Repository: elimu-ai/launcher
Pull request #96: Convert HomeScreensActivity to Kotlin
Author: login: tuancoltech
Created: 2025-04-02T23:47:41Z | Merged: 2025-04-03T08:03:13Z

- Convert HomeScreensActivity to Kotlin
- Use `viewBinding` in HomeScreenActivity
- Remove redundant SAM constructors

## Before
<img width="347" alt="Screenshot 2025-04-02 at 23 00 23" src="https://github.com/user-attachments/assets/31e66cd9-1010-42d2-b496-b2c21cfd143a" />

## After
<img width="337" alt="Screenshot 2025-04-03 at 07 00 42" src="https://github.com/user-attachments/assets/7dc46a40-7556-4856-b2d1-93d83bd51afb" />


<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit

## Summary by CodeRabbit

- **New Features**
  - Introduced a new home screen interface with swipe-based navigation across educational content sections.
  - Enhanced visual engagement through parallax background effects and intuitive dot navigation indicators.
  - Improved user feedback with clear prompts when certain applications are unavailable, ensuring a seamless and interactive experience.
  - Enabled view binding for more efficient interaction with layout views.
  - Added a new dependency for enhanced utility functions. 

- **Bug Fixes**
  - Integrated error handling for content provider queries, providing user feedback when no applications are found.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->


Diff:
diff --git a/app/build.gradle b/app/build.gradle
index 61f6166..86d3e49 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -31,6 +31,7 @@ android {
 
     buildFeatures {
         buildConfig = true
+        viewBinding true
     }
 
     compileOptions {
@@ -47,6 +48,7 @@ dependencies {
     implementation fileTree(include: ['*.jar'], dir: 'libs')
 
     implementation(libs.elimu.model) // See https://jitpack.io/#elimu-ai/model
+    implementation libs.elimu.common.utils
 
     implementation(libs.timber)
     implementation(libs.androidx.appcompat)
diff --git a/app/src/main/java/ai/elimu/launcher/ui/HomeScreensActivity.java b/app/src/main/java/ai/elimu/launcher/ui/HomeScreensActivity.java
deleted file mode 100644
index 57468be..0000000
--- a/app/src/main/java/ai/elimu/launcher/ui/HomeScreensActivity.java
+++ /dev/null
@@ -1,509 +0,0 @@
-package ai.elimu.launcher.ui;
-
-import android.animation.ObjectAnimator;
-import android.animation.ValueAnimator;
-import android.annotation.SuppressLint;
-import android.content.Intent;
-import android.content.pm.ApplicationInfo;
-import android.content.pm.PackageInfo;
-import android.content.pm.PackageManager;
-import android.content.res.Resources;
-import android.database.Cursor;
-import android.graphics.Point;
-import android.graphics.drawable.Drawable;
-import android.net.Uri;
-import android.os.Bundle;
-import android.text.TextUtils;
-import android.util.DisplayMetrics;
-import android.view.LayoutInflater;
-import android.view.View;
-import android.view.ViewGroup;
-import android.widget.GridLayout;
-import android.widget.ImageView;
-import android.widget.Toast;
-
-import androidx.annotation.NonNull;
-import androidx.appcompat.app.AppCompatActivity;
-import androidx.constraintlayout.widget.ConstraintLayout;
-import androidx.fragment.app.Fragment;
-import androidx.viewpager2.adapter.FragmentStateAdapter;
-import androidx.viewpager2.widget.ViewPager2;
-
-import com.afollestad.materialdialogs.DialogAction;
-import com.afollestad.materialdialogs.GravityEnum;
-import com.afollestad.materialdialogs.MaterialDialog;
-import com.afollestad.materialdialogs.Theme;
-import com.tbuonomo.viewpagerdotsindicator.DotsIndicator;
-
-import java.util.ArrayList;
-import java.util.List;
-import java.util.Locale;
-
-import ai.elimu.launcher.BuildConfig;
-import ai.elimu.launcher.R;
-import ai.elimu.launcher.util.CursorToApplicationConverter;
-import ai.elimu.model.v2.enums.content.LiteracySkill;
-import ai.elimu.model.v2.enums.content.NumeracySkill;
-import ai.elimu.model.v2.gson.application.ApplicationGson;
-import timber.log.Timber;
-
-import static android.view.ViewGroup.LayoutParams.MATCH_PARENT;
-
-public class HomeScreensActivity extends AppCompatActivity {
-
-    private static final String APPSTORE_DOWNLOAD_URL = "https://github.com/elimu-ai/appstore/releases";
-
-    public static final double WIDTH_INCREMENT = 0.1;
-
-    private SectionsPagerAdapter mSectionsPagerAdapter;
-
-    private View background;
-
-    private ViewPager2 viewPager;
-
-    private DotsIndicator dotIndicator;
-
-    private static List<ApplicationGson> applications;
-
-    private boolean isRightToLeft;
-
-    @Override
-    protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        setContentView(R.layout.activity_home_screens);
-
-        getWindow().getDecorView().setSystemUiVisibility(
-                View.SYSTEM_UI_FLAG_LAYOUT_STABLE | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
-
-        // Check if the elimu.ai Appstore is already installed
-        checkIfAppstoreIsInstalled();
-
-        // Create the adapter that will return a fragment for each of the primary sections of the activity.
-        mSectionsPagerAdapter = new SectionsPagerAdapter(this);
-
-        // Set up the ViewPager with the sections adapter.
-        viewPager = findViewById(R.id.container);
-        viewPager.setAdapter(mSectionsPagerAdapter);
-
-        dotIndicator = findViewById(R.id.dotIndicator);
-
-        background = findViewById(R.id.background);
-
-        isRightToLeft = TextUtils.getLayoutDirectionFromLocale(Locale.getDefault()) == View.LAYOUT_DIRECTION_RTL;
-
-        //Increase the width of the background image to apply the parallax effect
-        updateBackgroundImageWidth();
-
-        final int pageTranslation = (int) (getDisplayWidth() * WIDTH_INCREMENT / (mSectionsPagerAdapter.getItemCount() -1));
-
-        viewPager.registerOnPageChangeCallback(new ViewPager2.OnPageChangeCallback() {
-            @Override
-            public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
-                Timber.i("onPageScrolled");
-
-                if (positionOffset >= -1 && positionOffset <= 1) {
-                    int translationX = - (int) ((position + positionOffset) * pageTranslation);
-
-                    if (isRightToLeft) {
-                        translationX = - (int) (translationX + getDisplayWidth() * WIDTH_INCREMENT);
-                    }
-
-                    background.setTranslationX(translationX);
-                }
-            }
-
-            @Override
-            public void onPageSelected(int position) {
-                Timber.i("onPageSelected");
-            }
-
-            @Override
-            public void onPageScrollStateChanged(int state) {
-                Timber.i("onPageScrollStateChanged");
-            }
-        });
-        dotIndicator.attachTo(viewPager);
-
-        // Fetch Applications from the Appstore's ContentProvider
-        applications = new ArrayList<>();
-        Uri uri = Uri.parse("content://" + BuildConfig.APPSTORE_APPLICATION_ID + ".provider.application_provider/applications");
-        Timber.i("uri: " + uri);
-        Cursor cursor = getContentResolver().query(uri, null, null, null, null);
-        if (cursor != null) {
-            Timber.i("cursor.getCount(): " + cursor.getCount());
-            if (cursor.getCount() > 0) {
-                boolean isLast = false;
-                while (!isLast) {
-                    cursor.moveToNext();
-
-                    // Convert from database row to Gson
-                    ApplicationGson application = CursorToApplicationConverter.getApplication(cursor);
-
-                    applications.add(application);
-
-                    isLast = cursor.isLast();
-                }
-                Timber.i("cursor.isClosed(): " + cursor.isClosed());
-                cursor.close();
-            } else {
-                Toast.makeText(getApplicationContext(), "cursor.getCount() == 0", Toast.LENGTH_LONG).show();
-            }
-        } else {
-            Toast.makeText(getApplicationContext(), "cursor == null", Toast.LENGTH_LONG).show();
-        }
-        Timber.i("applications.size(): " + applications.size());
-    }
-
-    private void checkIfAppstoreIsInstalled() {
-        try {
-            PackageInfo packageInfoAppstore = getPackageManager().getPackageInfo(BuildConfig.APPSTORE_APPLICATION_ID, 0);
-            Timber.i("packageInfoAppstore.versionCode: " + packageInfoAppstore.versionCode);
-        } catch (PackageManager.NameNotFoundException e) {
-            Timber.w(null, e);
-            new MaterialDialog.Builder(this)
-                    .content(getResources().getString(R.string.appstore_needed) + BuildConfig.APPSTORE_APPLICATION_ID)
-                    .positiveText(getResources().getString(R.string.download))
-                    .onPositive(new MaterialDialog.SingleButtonCallback() {
-                        @Override
-                        public void onClick(@NonNull MaterialDialog dialog, @NonNull DialogAction which) {
-                            Intent intent = new Intent(Intent.ACTION_VIEW, Uri.parse(APPSTORE_DOWNLOAD_URL));
-                            startActivity(intent);
-                        }
-                    })
-                    .show();
-        }
-    }
-
-    private void updateBackgroundImageWidth() {
-        int backgroundWidth = (int) (getDisplayWidth() * (1 + WIDTH_INCREMENT));
-        ConstraintLayout.LayoutParams layoutParams = new ConstraintLayout.LayoutParams(backgroundWidth, MATCH_PARENT);
-        background.setLayoutParams(layoutParams);
-        if (isRightToLeft) {
-            background.setTranslationX(-(float) (getDisplayWidth() * WIDTH_INCREMENT));
-        }
-    }
-
-    private int getDisplayWidth() {
-        Point displaySize = new Point();
-        getWindowManager().getDefaultDisplay().getSize(displaySize);
-        return displaySize.x;
-    }
-
-    public static class PlaceholderFragment extends Fragment {
-
-        private static final String ARG_SECTION_NUMBER = "section_number";
-
-
-        // Skill: Tablet navigation
-
-        private ConstraintLayout tabletNavigationContainer;
-        private ImageView tabletNavigationImageView;
-
-
-        // Skills: EGRA
-
-        private ConstraintLayout egraOralVocabularyContainer;
-        private ImageView egraOralVocabularyImageView;
-
-        private ConstraintLayout egraPhonemicAwarenessContainer;
-        private ImageView egraPhonemicAwarenessImageView;
-
-        private ConstraintLayout egraLetterIdentificationContainer;
-        private ImageView egraLetterIdentificationImageView;
-
-        private ConstraintLayout egraSyllableNamingContainer;
-        private ImageView egraSyllableNamingImageView;
-
-
-        // Skills: EGMA
-
-        private ConstraintLayout egmaOralCountingContainer;
-        private ImageView egmaOralCountingImageView;
-
-        private ConstraintLayout egmaNumberIdentificationContainer;
-        private ImageView egmaNumberIdentificationImageView;
-
-        private ConstraintLayout egmaMissingNumberContainer;
-        private ImageView egmaMissingNumberImageView;
-
-
-        public PlaceholderFragment() {
-        }
-
-        public static PlaceholderFragment newInstance(int sectionNumber) {
-            PlaceholderFragment fragment = new PlaceholderFragment();
-            Bundle args = new Bundle();
-            args.putInt(ARG_SECTION_NUMBER, sectionNumber);
-            fragment.setArguments(args);
-            return fragment;
-        }
-
-        @Override
-        public View onCreateView(LayoutInflater inflater, ViewGroup container,
-                                 Bundle savedInstanceState) {
-            Timber.i("onCreateView");
-
-            int sectionNumber = getArguments().getInt(ARG_SECTION_NUMBER);
-            Timber.i("sectionNumber: " + sectionNumber);
-
-            int layoutIdentifier = getResources().getIdentifier("fragment_home_screen" + String.valueOf(sectionNumber), "layout", getActivity().getPackageName());
-            View rootView = inflater.inflate(layoutIdentifier, container, false);
-
-            if (sectionNumber == 1) {
-                // 1. Tablet navigation
-
-                tabletNavigationContainer = rootView.findViewById(R.id.tabletNavigationContainer);
-                tabletNavigationImageView = rootView.findViewById(R.id.tabletNavigationImageView);
-                tabletNavigationImageView.setOnClickListener(new View.OnClickListener() {
-                    @Override
-                    public void onClick(View v) {
-                        Timber.i("tabletNavigationImageView onClick");
-
-                        // Tablet Navigation
-//                        initializeDialog(null, null);
-                        initializeDialog(null, NumeracySkill.SHAPE_IDENTIFICATION);
-                    }
-                });
-
-
-                // 2. EGRA skills
-
-                egraOralVocabularyContainer = rootView.findViewById(R.id.egraOralVocabularyContainer);
-                egraOralVocabularyImageView = rootView.findViewById(R.id.egraOralVocabularyImageView);
-                egraOralVocabularyImageView.setOnClickListener(new View.OnClickListener() {
-                    @Override
-                    public void onClick(View v) {
-                        Timber.i("egraOralVocabularyImageView onClick");
-
-                        // Oral Vocabulary and Listening Comprehension
-                        // TODO: include LiteracySkill.LISTENING_COMPREHENSION
-                        initializeDialog(LiteracySkill.ORAL_VOCABULARY, null);
-                    }
-                });
-
-                egraPhonemicAwarenessContainer = rootView.findViewById(R.id.egraPhonemicAwarenessContainer);
-                egraPhonemicAwarenessImageView = rootView.findViewById(R.id.egraPhonemicAwarenessImageView);
-                egraPhonemicAwarenessImageView.setOnClickListener(new View.OnClickListener() {
-                    @Override
-                    public void onClick(View v) {
-                        Timber.i("egraPhonemicAwarenessImageView onClick");
-
-                        // Phonemic Awareness
-                        initializeDialog(LiteracySkill.PHONEMIC_AWARENESS, null);
-                    }
-                });
-
-                egraLetterIdentificationContainer = rootView.findViewById(R.id.egraLetterIdentificationContainer);
-                egraLetterIdentificationImageView = rootView.findViewById(R.id.egraLetterIdentificationImageView);
-                egraLetterIdentificationImageView.setOnClickListener(new View.OnClickListener() {
-                    @Override
-                    public void onClick(View v) {
-                        Timber.i("egraLetterIdentificationImageView onClick");
-
-                        // Letter Identification
-                        initializeDialog(LiteracySkill.LETTER_IDENTIFICATION, null);
-                    }
-                });
-
-
-                // 3. EGMA skills
-
-                egmaOralCountingContainer = rootView.findViewById(R.id.egmaOralCountingContainer);
-                egmaOralCountingImageView = rootView.findViewById(R.id.egmaOralCountingImageView);
-                egmaOralCountingImageView.setOnClickListener(new View.OnClickListener() {
-                    @Override
-                    public void onClick(View v) {
-                        Timber.i("egmaOralCountingImageView onClick");
-
-                        // Oral Counting
-                        initializeDialog(null, NumeracySkill.ORAL_COUNTING);
-                    }
-                });
-
-                egmaNumberIdentificationContainer = rootView.findViewById(R.id.egmaNumberIdentificationContainer);
-                egmaNumberIdentificationImageView = rootView.findViewById(R.id.egmaNumberIdentificationImageView);
-                egmaNumberIdentificationImageView.setOnClickListener(new View.OnClickListener() {
-                    @Override
-                    public void onClick(View v) {
-                        Timber.i("egmaNumberIdentificationImageView onClick");
-
-                        // Number Identification
-                        initializeDialog(null, NumeracySkill.NUMBER_IDENTIFICATION);
-                    }
-                });
-
-                egmaMissingNumberContainer = rootView.findViewById(R.id.egmaMissingNumberContainer);
-                egmaMissingNumberImageView = rootView.findViewById(R.id.egmaMissingNumberImageView);
-                egmaMissingNumberImageView.setOnClickListener(new View.OnClickListener() {
-                    @Override
-                    public void onClick(View v) {
-                        Timber.i("egmaMissingNumberImageView onClick");
-
-                        // Missing Number and Quantity Discrimination
-                        initializeDialog(null, NumeracySkill.MISSING_NUMBER);
-                    }
-                });
-            } else if (sectionNumber == 2) {
-                // 1. EGRA skills
-
-                egraSyllableNamingContainer = rootView.findViewById(R.id.egraSyllableNamingContainer);
-                egraSyllableNamingImageView = rootView.findViewById(R.id.egraSyllableNamingImageView);
-                egraSyllableNamingImageView.setOnClickListener(new View.OnClickListener() {
-                    @Override
-                    public void onClick(View v) {
-                        Timber.i("egraSyllableNamingImageView onClick");
-
-                        // Syllable Naming and Familiar Word Reading
-                        initializeDialog(LiteracySkill.FAMILIAR_WORD_READING, null);
-                    }
-                });
-
-
-                // 2. EGMA skills
-
-                // TODO
-            } else if (sectionNumber == 3) {
-                // TODO
-            }  else if (sectionNumber == 4) {
-                // TODO
-            }
-
-            return rootView;
-        }
-
-        private void initializeDialog(LiteracySkill literacySkill, NumeracySkill numeracySkill) {
-            Timber.i("initializeDialog");
-
-            String dialogTitle = null;
-            if (false) { // TODO
-                dialogTitle = "TABLET_NAVIGATION"; // TODO
-            } else if (literacySkill != null) {
-                dialogTitle = literacySkill.toString();
-            } else if (numeracySkill != null) {
-                dialogTitle = numeracySkill.toString();
-            }
-
-            MaterialDialog materialDialog = new MaterialDialog.Builder(getContext())
-                    .customView(R.layout.dialog_apps, true)
-                    .theme(Theme.DARK)
-                    .title(dialogTitle)
-                    .titleGravity(GravityEnum.CENTER)
-                    .show();
-
-            View customView = materialDialog.getCustomView();
-            GridLayout appGridLayout = customView.findViewById(R.id.appGridLayout);
-
-            for (final ApplicationGson application : applications) {
-                Timber.i("application.getPackageName(): " + application.getPackageName());
-                boolean isTabletNavigationSkill = false; // TODO
-                Timber.i("isTabletNavigationSkill: " + isTabletNavigationSkill);
-                boolean isLiteracySkill = application.getLiteracySkills().contains(literacySkill);
-                Timber.i("isLiteracySkill: " + isLiteracySkill);
-                boolean isNumeracySkill = application.getNumeracySkills().contains(numeracySkill);
-                Timber.i("isNumeracySkill: " + isNumeracySkill);
-                if (isTabletNavigationSkill || isLiteracySkill || isNumeracySkill) {
-                    // Add Application to dialog
-
-                    // Check if the Application is already installed. If not, skip it.
-                    try {
-                        PackageInfo packageInfoAppstore = getContext().getPackageManager().getPackageInfo(application.getPackageName(), 0);
-                        Timber.i( "packageInfoAppstore.versionCode: " + packageInfoAppstore.versionCode);
-                    } catch (PackageManager.NameNotFoundException e) {
-                        Timber.i(e, "The Application has not been installed: " + application.getPackageName());
-                        continue;
-                    }
-
-                    View appView = LayoutInflater.from(getActivity()).inflate(R.layout.dialog_apps_app_view, appGridLayout, false);
-
-                    // Set app icon
-                    ImageView appIconImageView = appView.findViewById(R.id.appIconImageView);
-                    final PackageManager packageManager = getActivity().getPackageManager();
-                    try {
-                        ApplicationInfo applicationInfo = packageManager.getApplicationInfo(application.getPackageName(), PackageManager.GET_META_DATA);
-                        Resources resources = packageManager.getResourcesForApplication(application.getPackageName());
-                        Drawable icon = resources.getDrawableForDensity(applicationInfo.icon, DisplayMetrics.DENSITY_XXHIGH, null);
-                        appIconImageView.setImageDrawable(icon);
-                    } catch (PackageManager.NameNotFoundException e) {
-                        Timber.e(e);
-                    }
-
-                    // Open Application when pressing app icon
-                    appIconImageView.setOnClickListener(new View.OnClickListener() {
-                        @Override
-                        public void onClick(View v) {
-                            Timber.i("appIconImageView onClick");
-
-                            Intent intent = packageManager.getLaunchIntentForPackage(application.getPackageName());
-                            intent.addCategory(Intent.CATEGORY_LAUNCHER);
-                            intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED);
-                            startActivity(intent);
-
-//                            EventTracker.reportApplicationOpenedEvent(getContext(), activityInfo.packageName);
-                        }
-                    });
-
-                    appGridLayout.addView(appView);
-                }
-            }
-        }
-
-        @Override
-        public void onStart() {
-            Timber.i("onCreateView");
-            super.onStart();
-        }
-
-        @Override
-        public void onResume() {
-            Timber.i("onResume");
-            super.onResume();
-
-            // Add subtle movements to the space ships
-
-            ObjectAnimator objectAnimatorEGRA = ObjectAnimator.ofFloat(egraOralVocabularyContainer, "rotation", 2 + ((int) Math.random() * 3));
-            objectAnimatorEGRA.setDuration(1000 + ((int) Math.random() * 1000));
-            objectAnimatorEGRA.setRepeatCount(ValueAnimator.INFINITE);
-            objectAnimatorEGRA.setRepeatMode(ValueAnimator.REVERSE);
-            objectAnimatorEGRA.start();
-
-            ObjectAnimator objectAnimatorEgmaPhonemicAwareness = ObjectAnimator.ofFloat(egraPhonemicAwarenessContainer, "rotation", 2 + ((int) Math.random() * 3));
-            objectAnimatorEgmaPhonemicAwareness.setDuration(1000 + ((int) Math.random() * 1000));
-            objectAnimatorEgmaPhonemicAwareness.setRepeatCount(ValueAnimator.INFINITE);
-            objectAnimatorEgmaPhonemicAwareness.setRepeatMode(ValueAnimator.REVERSE);
-            objectAnimatorEgmaPhonemicAwareness.start();
-
-            ObjectAnimator objectAnimatorEGMA = ObjectAnimator.ofFloat(egmaOralCountingContainer, "rotation", 2 + ((int) Math.random() * 3));
-            objectAnimatorEGMA.setDuration(1000 + ((int) Math.random() * 1000));
-            objectAnimatorEGMA.setRepeatCount(ValueAnimator.INFINITE);
-            objectAnimatorEGMA.setRepeatMode(ValueAnimator.REVERSE);
-            objectAnimatorEGMA.start();
-        }
-    }
-
-    public static class SectionsPagerAdapter extends FragmentStateAdapter {
-
-        public SectionsPagerAdapter(AppCompatActivity activity) {
-            super(activity);
-        }
-
-        @NonNull
-        @Override
-        public Fragment createFragment(int position) {
-            return PlaceholderFragment.newInstance(position + 1);
-        }
-
-        @Override
-        public int getItemCount() {
-            return 4;
-        }
-    }
-
-
-    @SuppressLint("MissingSuperCall")
-    @Override
-    public void onBackPressed() {
-        Timber.i("onBackPressed");
-
-        // Do nothing
-    }
-}
diff --git a/app/src/main/java/ai/elimu/launcher/ui/HomeScreensActivity.kt b/app/src/main/java/ai/elimu/launcher/ui/HomeScreensActivity.kt
new file mode 100644
index 0000000..ac80310
--- /dev/null
+++ b/app/src/main/java/ai/elimu/launcher/ui/HomeScreensActivity.kt
@@ -0,0 +1,496 @@
+package ai.elimu.launcher.ui
+
+import ai.elimu.common.utils.ui.setLightStatusBar
+import ai.elimu.common.utils.ui.setStatusBarColorCompat
+import ai.elimu.launcher.BuildConfig
+import ai.elimu.launcher.R
+import ai.elimu.launcher.databinding.ActivityHomeScreensBinding
+import ai.elimu.launcher.util.CursorToApplicationConverter
+import ai.elimu.model.v2.enums.content.LiteracySkill
+import ai.elimu.model.v2.enums.content.NumeracySkill
+import ai.elimu.model.v2.gson.application.ApplicationGson
+import android.animation.ObjectAnimator
+import android.animation.ValueAnimator
+import android.annotation.SuppressLint
+import android.content.Intent
+import android.content.pm.PackageManager
+import android.graphics.Point
+import android.net.Uri
+import android.os.Bundle
+import android.text.TextUtils
+import android.util.DisplayMetrics
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.GridLayout
+import android.widget.ImageView
+import android.widget.Toast
+import androidx.appcompat.app.AppCompatActivity
+import androidx.constraintlayout.widget.ConstraintLayout
+import androidx.fragment.app.Fragment
+import androidx.viewpager2.adapter.FragmentStateAdapter
+import androidx.viewpager2.widget.ViewPager2.OnPageChangeCallback
+import com.afollestad.materialdialogs.GravityEnum
+import com.afollestad.materialdialogs.MaterialDialog
+import com.afollestad.materialdialogs.Theme
+import timber.log.Timber
+import java.util.Locale
+
+class HomeScreensActivity : AppCompatActivity() {
+    private lateinit var binding: ActivityHomeScreensBinding
+    private var mSectionsPagerAdapter: SectionsPagerAdapter? = null
+
+    private var isRightToLeft = false
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        binding = ActivityHomeScreensBinding.inflate(layoutInflater)
+        setContentView(binding.root)
+
+        window.decorView.systemUiVisibility =
+            View.SYSTEM_UI_FLAG_LAYOUT_STABLE or View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
+
+        // Check if the elimu.ai Appstore is already installed
+        checkIfAppstoreIsInstalled()
+
+        // Create the adapter that will return a fragment for each of the primary sections of the activity.
+        mSectionsPagerAdapter = SectionsPagerAdapter(this)
+
+        // Set up the ViewPager with the sections adapter.
+        binding.container.setAdapter(mSectionsPagerAdapter)
+
+        isRightToLeft =
+            TextUtils.getLayoutDirectionFromLocale(Locale.getDefault()) == View.LAYOUT_DIRECTION_RTL
+
+        //Increase the width of the background image to apply the parallax effect
+        updateBackgroundImageWidth()
+
+        val pageTranslation =
+            (displayWidth * WIDTH_INCREMENT / (mSectionsPagerAdapter!!.itemCount - 1)).toInt()
+
+        binding.container.let {
+            it.registerOnPageChangeCallback(object : OnPageChangeCallback() {
+                override fun onPageScrolled(
+                    position: Int,
+                    positionOffset: Float,
+                    positionOffsetPixels: Int
+                ) {
+                    Timber.i("onPageScrolled")
+
+                    if (positionOffset >= -1 && positionOffset <= 1) {
+                        var translationX = -((position + positionOffset) * pageTranslation).toInt()
+
+                        if (isRightToLeft) {
+                            translationX = -(translationX + this@HomeScreensActivity.displayWidth * WIDTH_INCREMENT).toInt()
+                        }
+
+                        binding.background.translationX = translationX.toFloat()
+                    }
+                }
+
+                override fun onPageSelected(position: Int) {
+                    Timber.i("onPageSelected")
+                }
+
+                override fun onPageScrollStateChanged(state: Int) {
+                    Timber.i("onPageScrollStateChanged")
+                }
+            })
+            binding.dotIndicator.attachTo(it)
+        }
+
+        // Fetch Applications from the Appstore's ContentProvider
+        val uri =
+            Uri.parse("content://" + BuildConfig.APPSTORE_APPLICATION_ID + ".provider.application_provider/applications")
+        Timber.i("uri: $uri")
+        val cursor = contentResolver.query(uri, null, null, null, null)
+        if (cursor != null) {
+            Timber.i("cursor.getCount(): " + cursor.count)
+            if (cursor.count > 0) {
+                var isLast = false
+                while (!isLast) {
+                    cursor.moveToNext()
+
+                    // Convert from database row to Gson
+                    val application = CursorToApplicationConverter.getApplication(cursor)
+
+                    applications.add(application)
+
+                    isLast = cursor.isLast
+                }
+                Timber.i("cursor.isClosed(): " + cursor.isClosed)
+                cursor.close()
+            } else {
+                Toast.makeText(applicationContext, "cursor.getCount() == 0", Toast.LENGTH_LONG)
+                    .show()
+            }
+        } else {
+            Toast.makeText(applicationContext, "cursor == null", Toast.LENGTH_LONG).show()
+        }
+        Timber.i("applications.size(): " + applications.size)
+
+        window.apply {
+            setLightStatusBar()
+            setStatusBarColorCompat(R.color.colorPrimaryDark)
+        }
+    }
+
+    private fun checkIfAppstoreIsInstalled() {
+        try {
+            val packageInfoAppstore =
+                packageManager.getPackageInfo(BuildConfig.APPSTORE_APPLICATION_ID, 0)
+            Timber.i("packageInfoAppstore.versionCode: " + packageInfoAppstore.versionCode)
+        } catch (e: PackageManager.NameNotFoundException) {
+            Timber.w(null, e)
+            MaterialDialog.Builder(this)
+                .content(resources.getString(R.string.appstore_needed) + BuildConfig.APPSTORE_APPLICATION_ID)
+                .positiveText(resources.getString(R.string.download))
+                .onPositive { dialog, which ->
+                    val intent = Intent(
+                        Intent.ACTION_VIEW,
+                        Uri.parse(APPSTORE_DOWNLOAD_URL)
+                    )
+                    startActivity(intent)
+                }
+                .show()
+        }
+    }
+
+    private fun updateBackgroundImageWidth() {
+        val backgroundWidth = (displayWidth * (1 + WIDTH_INCREMENT)).toInt()
+        val layoutParams =
+            ConstraintLayout.LayoutParams(backgroundWidth, ViewGroup.LayoutParams.MATCH_PARENT)
+        binding.background.layoutParams = layoutParams
+        if (isRightToLeft) {
+            binding.background.translationX =
+                -(displayWidth * WIDTH_INCREMENT).toFloat()
+        }
+    }
+
+    private val displayWidth: Int
+        get() {
+            val displaySize = Point()
+            windowManager.defaultDisplay.getSize(displaySize)
+            return displaySize.x
+        }
+
+    class PlaceholderFragment : Fragment() {
+        // Skill: Tablet navigation
+        private var tabletNavigationContainer: ConstraintLayout? = null
+        private var tabletNavigationImageView: ImageView? = null
+
+
+        // Skills: EGRA
+        private var egraOralVocabularyContainer: ConstraintLayout? = null
+        private var egraOralVocabularyImageView: ImageView? = null
+
+        private var egraPhonemicAwarenessContainer: ConstraintLayout? = null
+        private var egraPhonemicAwarenessImageView: ImageView? = null
+
+        private var egraLetterIdentificationContainer: ConstraintLayout? = null
+        private var egraLetterIdentificationImageView: ImageView? = null
+
+        private var egraSyllableNamingContainer: ConstraintLayout? = null
+        private var egraSyllableNamingImageView: ImageView? = null
+
+
+        // Skills: EGMA
+        private var egmaOralCountingContainer: ConstraintLayout? = null
+        private var egmaOralCountingImageView: ImageView? = null
+
+        private var egmaNumberIdentificationContainer: ConstraintLayout? = null
+        private var egmaNumberIdentificationImageView: ImageView? = null
+
+        private var egmaMissingNumberContainer: ConstraintLayout? = null
+        private var egmaMissingNumberImageView: ImageView? = null
+
+
+        override fun onCreateView(
+            inflater: LayoutInflater, container: ViewGroup?,
+            savedInstanceState: Bundle?
+        ): View? {
+            Timber.i("onCreateView")
+
+            val sectionNumber = arguments?.getInt(ARG_SECTION_NUMBER)
+            Timber.i("sectionNumber: $sectionNumber")
+
+            val layoutIdentifier = resources.getIdentifier(
+                "fragment_home_screen$sectionNumber",
+                "layout",
+                activity?.packageName
+            )
+            val rootView = inflater.inflate(layoutIdentifier, container, false)
+
+            if (sectionNumber == 1) {
+                // 1. Tablet navigation
+
+                tabletNavigationContainer = rootView.findViewById(R.id.tabletNavigationContainer)
+                tabletNavigationImageView = rootView.findViewById(R.id.tabletNavigationImageView)
+                tabletNavigationImageView?.setOnClickListener {
+                    Timber.i("tabletNavigationImageView onClick")
+                    // Tablet Navigation
+                    //                        initializeDialog(null, null);
+                    initializeDialog(null, NumeracySkill.SHAPE_IDENTIFICATION)
+                }
+
+
+                // 2. EGRA skills
+                egraOralVocabularyContainer =
+                    rootView.findViewById(R.id.egraOralVocabularyContainer)
+                egraOralVocabularyImageView =
+                    rootView.findViewById(R.id.egraOralVocabularyImageView)
+                egraOralVocabularyImageView?.setOnClickListener {
+                    Timber.i("egraOralVocabularyImageView onClick")
+                    // Oral Vocabulary and Listening Comprehension
+                    // TODO: include LiteracySkill.LISTENING_COMPREHENSION
+                    initializeDialog(LiteracySkill.ORAL_VOCABULARY, null)
+                }
+
+                egraPhonemicAwarenessContainer =
+                    rootView.findViewById(R.id.egraPhonemicAwarenessContainer)
+                egraPhonemicAwarenessImageView =
+                    rootView.findViewById(R.id.egraPhonemicAwarenessImageView)
+                egraPhonemicAwarenessImageView?.setOnClickListener {
+                    Timber.i("egraPhonemicAwarenessImageView onClick")
+                    // Phonemic Awareness
+                    initializeDialog(LiteracySkill.PHONEMIC_AWARENESS, null)
+                }
+
+                egraLetterIdentificationContainer =
+                    rootView.findViewById(R.id.egraLetterIdentificationContainer)
+                egraLetterIdentificationImageView =
+                    rootView.findViewById(R.id.egraLetterIdentificationImageView)
+                egraLetterIdentificationImageView?.setOnClickListener {
+                    Timber.i("egraLetterIdentificationImageView onClick")
+                    // Letter Identification
+                    initializeDialog(LiteracySkill.LETTER_IDENTIFICATION, null)
+                }
+
+
+                // 3. EGMA skills
+                egmaOralCountingContainer = rootView.findViewById(R.id.egmaOralCountingContainer)
+                egmaOralCountingImageView = rootView.findViewById(R.id.egmaOralCountingImageView)
+                egmaOralCountingImageView?.setOnClickListener {
+                    Timber.i("egmaOralCountingImageView onClick")
+                    // Oral Counting
+                    initializeDialog(null, NumeracySkill.ORAL_COUNTING)
+                }
+
+                egmaNumberIdentificationContainer =
+                    rootView.findViewById(R.id.egmaNumberIdentificationContainer)
+                egmaNumberIdentificationImageView =
+                    rootView.findViewById(R.id.egmaNumberIdentificationImageView)
+                egmaNumberIdentificationImageView?.setOnClickListener {
+                    Timber.i("egmaNumberIdentificationImageView onClick")
+                    // Number Identification
+                    initializeDialog(null, NumeracySkill.NUMBER_IDENTIFICATION)
+                }
+
+                egmaMissingNumberContainer = rootView.findViewById(R.id.egmaMissingNumberContainer)
+                egmaMissingNumberImageView = rootView.findViewById(R.id.egmaMissingNumberImageView)
+                egmaMissingNumberImageView?.setOnClickListener {
+                    Timber.i("egmaMissingNumberImageView onClick")
+                    // Missing Number and Quantity Discrimination
+                    initializeDialog(null, NumeracySkill.MISSING_NUMBER)
+                }
+            } else if (sectionNumber == 2) {
+                // 1. EGRA skills
+
+                egraSyllableNamingContainer =
+                    rootView.findViewById(R.id.egraSyllableNamingContainer)
+                egraSyllableNamingImageView =
+                    rootView.findViewById(R.id.egraSyllableNamingImageView)
+                egraSyllableNamingImageView?.setOnClickListener {
+                    Timber.i("egraSyllableNamingImageView onClick")
+                    // Syllable Naming and Familiar Word Reading
+                    initializeDialog(LiteracySkill.FAMILIAR_WORD_READING, null)
+                }
+
+
+                // 2. EGMA skills
+
+                // TODO
+            } else if (sectionNumber == 3) {
+                // TODO
+            } else if (sectionNumber == 4) {
+                // TODO
+            }
+
+            return rootView
+        }
+
+        private fun initializeDialog(literacySkill: LiteracySkill?, numeracySkill: NumeracySkill?) {
+            Timber.i("initializeDialog")
+
+            var dialogTitle: String? = null
+            if (false) { // TODO
+                dialogTitle = "TABLET_NAVIGATION" // TODO
+            } else if (literacySkill != null) {
+                dialogTitle = literacySkill.toString()
+            } else if (numeracySkill != null) {
+                dialogTitle = numeracySkill.toString()
+            }
+
+            val materialDialog = MaterialDialog.Builder(requireContext())
+                .customView(R.layout.dialog_apps, true)
+                .theme(Theme.DARK)
+                .title(dialogTitle!!)
+                .titleGravity(GravityEnum.CENTER)
+                .show()
+
+            val customView = materialDialog.customView
+            val appGridLayout = customView!!.findViewById<GridLayout>(R.id.appGridLayout)
+
+            for (application in applications) {
+                Timber.i("application.getPackageName(): " + application.packageName)
+                val isTabletNavigationSkill = false // TODO
+                Timber.i("isTabletNavigationSkill: $isTabletNavigationSkill")
+                val isLiteracySkill = application.literacySkills.contains(literacySkill)
+                Timber.i("isLiteracySkill: $isLiteracySkill")
+                val isNumeracySkill = application.numeracySkills.contains(numeracySkill)
+                Timber.i("isNumeracySkill: $isNumeracySkill")
+                if (isTabletNavigationSkill || isLiteracySkill || isNumeracySkill) {
+                    // Add Application to dialog
+
+                    // Check if the Application is already installed. If not, skip it.
+
+                    try {
+                        val packageInfoAppstore =
+                            requireContext().packageManager.getPackageInfo(application.packageName, 0)
+                        Timber.i("packageInfoAppstore.versionCode: " + packageInfoAppstore.versionCode)
+                    } catch (e: PackageManager.NameNotFoundException) {
+                        Timber.i(
+                            e,
+                            "The Application has not been installed: " + application.packageName
+                        )
+                        continue
+                    }
+
+                    val appView = LayoutInflater.from(activity)
+                        .inflate(R.layout.dialog_apps_app_view, appGridLayout, false)
+
+                    // Set app icon
+                    val appIconImageView = appView.findViewById<ImageView>(R.id.appIconImageView)
+                    val packageManager = activity?.packageManager ?: return
+                    try {
+                        val applicationInfo = packageManager.getApplicationInfo(
+                            application.packageName,
+                            PackageManager.GET_META_DATA
+                        )
+                        val resources =
+                            packageManager.getResourcesForApplication(application.packageName)
+                        val icon = resources.getDrawableForDensity(
+                            applicationInfo.icon,
+                            DisplayMetrics.DENSITY_XXHIGH,
+                            null
+                        )
+                        appIconImageView.setImageDrawable(icon)
+                    } catch (e: PackageManager.NameNotFoundException) {
+                        Timber.e(e)
+                    }
+
+                    // Open Application when pressing app icon
+                    appIconImageView.setOnClickListener {
+                        Timber.i("appIconImageView onClick")
+                        val intent =
+                            packageManager.getLaunchIntentForPackage(application.packageName)
+                        intent!!.addCategory(Intent.CATEGORY_LAUNCHER)
+                        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED)
+                        startActivity(intent)
+                        //                            EventTracker.reportApplicationOpenedEvent(getContext(), activityInfo.packageName);
+                    }
+
+                    appGridLayout.addView(appView)
+                }
+            }
+        }
+
+        override fun onStart() {
+            Timber.i("onCreateView")
+            super.onStart()
+        }
+
+        override fun onResume() {
+            Timber.i("onResume")
+            super.onResume()
+
+            egraOralVocabularyContainer?.let { container ->
+                // Add subtle movements to the space ships
+                val objectAnimatorEGRA = ObjectAnimator.ofFloat(
+                    container,
+                    "rotation",
+                    (2 + (Math.random().toInt() * 3)).toFloat()
+                )
+                objectAnimatorEGRA.setDuration((1000 + (Math.random().toInt() * 1000)).toLong())
+                objectAnimatorEGRA.repeatCount = ValueAnimator.INFINITE
+                objectAnimatorEGRA.repeatMode = ValueAnimator.REVERSE
+                objectAnimatorEGRA.start()
+            }
+
+            egraPhonemicAwarenessContainer?.let { container ->
+                val objectAnimatorEgmaPhonemicAwareness = ObjectAnimator.ofFloat(
+                    container,
+                    "rotation",
+                    (2 + (Math.random().toInt() * 3)).toFloat()
+                )
+                objectAnimatorEgmaPhonemicAwareness.setDuration(
+                    (1000 + (Math.random().toInt() * 1000)).toLong()
+                )
+                objectAnimatorEgmaPhonemicAwareness.repeatCount = ValueAnimator.INFINITE
+                objectAnimatorEgmaPhonemicAwareness.repeatMode = ValueAnimator.REVERSE
+                objectAnimatorEgmaPhonemicAwareness.start()
+            }
+
+            egmaOralCountingContainer?.let { container ->
+                val objectAnimatorEGMA = ObjectAnimator.ofFloat(
+                    container,
+                    "rotation",
+                    (2 + (Math.random().toInt() * 3)).toFloat()
+                )
+                objectAnimatorEGMA.setDuration((1000 + (Math.random().toInt() * 1000)).toLong())
+                objectAnimatorEGMA.repeatCount = ValueAnimator.INFINITE
+                objectAnimatorEGMA.repeatMode = ValueAnimator.REVERSE
+                objectAnimatorEGMA.start()
+            }
+        }
+
+        companion object {
+            private const val ARG_SECTION_NUMBER = "section_number"
+
+
+            fun newInstance(sectionNumber: Int): PlaceholderFragment {
+                val fragment = PlaceholderFragment()
+                val args = Bundle()
+                args.putInt(ARG_SECTION_NUMBER, sectionNumber)
+                fragment.arguments = args
+                return fragment
+            }
+        }
+    }
+
+    class SectionsPagerAdapter(activity: AppCompatActivity) : FragmentStateAdapter(activity) {
+        override fun createFragment(position: Int): Fragment {
+            return PlaceholderFragment.newInstance(position + 1)
+        }
+
+        override fun getItemCount(): Int {
+            return 4
+        }
+    }
+
+
+    @SuppressLint("MissingSuperCall")
+    override fun onBackPressed() {
+        Timber.i("onBackPressed")
+
+        // Do nothing
+    }
+
+    companion object {
+        private const val APPSTORE_DOWNLOAD_URL = "https://github.com/elimu-ai/appstore/releases"
+
+        const val WIDTH_INCREMENT: Double = 0.1
+
+        private val applications: MutableList<ApplicationGson> by lazy { mutableListOf() }
+    }
+}
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index f5e5b46..f50b6fb 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -1,5 +1,6 @@
 [versions]
 elimuModel = "model-2.0.83"
+elimuCommonUtils = "1.0.5"
 timber = "5.0.1"
 viewpager2 = "1.1.0"
 dotsIndicator = "5.1.0"
@@ -13,6 +14,7 @@ testEspresso = "3.0.2"
 
 [libraries]
 elimu-model = { group = "com.github.elimu-ai", name = "model", version.ref = "elimuModel" }
+elimu-common-utils = { group = "com.github.elimu-ai", name = "common-utils", version.ref = "elimuCommonUtils" }
 timber = { group = "com.jakewharton.timber", name = "timber", version.ref = "timber" }
 dots-indicator = { group = "com.tbuonomo", name = "dotsindicator", version.ref = "dotsIndicator" }
 material-dialog = { group = "com.afollestad.material-dialogs", name = "core", version.ref = "materialDialog" }


Reviews:
user: login: coderabbitai[bot]
body: **Actionable comments posted: 2**

<details>
<summary>🧹 Nitpick comments (5)</summary><blockquote>

<details>
<summary>app/src/main/java/ai/elimu/launcher/ui/HomeScreensActivity.kt (5)</summary><blockquote>

`53-55`: **Consider using newer fullscreen APIs.**  
`View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN` and `systemUiVisibility` are superseded with more modern APIs (e.g., `WindowCompat.setDecorFitsSystemWindows`). This might help avoid potential deprecation issues on newer Android versions.  

```diff
-    window.decorView.systemUiVisibility =
-        View.SYSTEM_UI_FLAG_LAYOUT_STABLE or View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
+    WindowCompat.setDecorFitsSystemWindows(window, false)
```

---

`141-160`: **Usage of `versionCode` is deprecated.**  
When checking if the Appstore is installed, the `versionCode` field has been deprecated in newer API levels. Prefer using `versionName` or the new API `getLongVersionCode()` from `PackageInfo`.  

```diff
-    Timber.i("packageInfoAppstore.versionCode: " + packageInfoAppstore.versionCode)
+    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) {
+        Timber.i("packageInfoAppstore.getLongVersionCode(): " + packageInfoAppstore.longVersionCode)
+    } else {
+        @Suppress("DEPRECATION")
+        Timber.i("packageInfoAppstore.versionCode: " + packageInfoAppstore.versionCode)
+    }
```

---

`249-249`: **Follow through on the TODO.**  
Line 249 references an unimplemented feature for `LISTENING_COMPREHENSION`. It would be good to handle or clarify this functionality to ensure coverage of all EGRA skills.  

Would you like help implementing the `LISTENING_COMPREHENSION` logic here?

---

`329-330`: **Remove or replace the hard-coded `if (false)`.**  
This block permanently skips the `TABLET_NAVIGATION` path. If the code is no longer needed, remove it; otherwise, replace the condition and implement the logic.  

```diff
-            if (false) { // TODO
+            if (someCondition) { // or remove the entire block if it's not needed
```

---

`480-484`: **Avoid suppressing the super call on `onBackPressed`.**  
While this is a launcher-style activity, consider explaining or clarifying the decision. A future contributor may be confused by the missing super call if the default back navigation is intentionally disabled.  

```diff
@SuppressLint("MissingSuperCall")
override fun onBackPressed() {
    Timber.i("onBackPressed")
-    // Do nothing
+    // Intentionally disabling back navigation for a launcher activity
}
```

</blockquote></details>

</blockquote></details>

<details>
<summary>📜 Review details</summary>

**Configuration used: CodeRabbit UI**
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<details>
<summary>📥 Commits</summary>

Reviewing files that changed from the base of the PR and between c02f38af124082b90d8c4755996f087b19e70326 and 3fb2f06f57d983258982a6e8f08de841967ff181.

</details>

<details>
<summary>📒 Files selected for processing (2)</summary>

* `app/src/main/java/ai/elimu/launcher/ui/HomeScreensActivity.java` (0 hunks)
* `app/src/main/java/ai/elimu/launcher/ui/HomeScreensActivity.kt` (1 hunks)

</details>

<details>
<summary>💤 Files with no reviewable changes (1)</summary>

* app/src/main/java/ai/elimu/launcher/ui/HomeScreensActivity.java

</details>

<details>
<summary>⏰ Context from checks skipped due to timeout of 90000ms (4)</summary>

* GitHub Check: build (windows-latest, 21)
* GitHub Check: build (windows-latest, 17)
* GitHub Check: build (ubuntu-latest, 17)
* GitHub Check: build (ubuntu-latest, 21)

</details>

</details>

<!-- This is an auto-generated comment by CodeRabbit for review status -->
state: CHANGES_REQUESTED
author_association: NONE
submitted_at: 2025-04-02T23:50:43Z
user: login: coderabbitai[bot]
body: **Actionable comments posted: 0**

<details>
<summary>🧹 Nitpick comments (4)</summary><blockquote>

<details>
<summary>app/src/main/java/ai/elimu/launcher/ui/HomeScreensActivity.kt (4)</summary><blockquote>

`100-119`: **Consider simplifying the cursor iteration.**  
You can iterate with `while (cursor.moveToNext()) { ... }` instead of manually tracking `isLast`. This would reduce complexity and potential off-by-one errors.


```diff
- var isLast = false
- while (!isLast) {
-     cursor.moveToNext()
-     ...
-     isLast = cursor.isLast
- }
+ while (cursor.moveToNext()) {
+     ...
+ }
```

---

`131-135`: **Use newer APIs for retrieving PackageInfo.**  
`versionCode` is deprecated in newer Android SDK versions (Android 10+). Consider using `versionName` or the newer `getLongVersionCode()` for a more future-proof approach.

---

`315-399`: **Extract repeated setup logic to reduce duplication.**  
Multiple lines in `initializeDialog` handle repeated tasks (resolving icons, loading installed apps, etc.). Moving this into helper methods or a dedicated class can aid readability.

---

`423-425`: **Rename objectAnimator for clarity.**  
`objectAnimatorEgmaPhonemicAwareness` references the EGRA container. Rename to avoid confusion.  

```diff
- val objectAnimatorEgmaPhonemicAwareness = ObjectAnimator.ofFloat(
-     egraPhonemicAwarenessContainer,
-     "rotation",
-     ...
- )
+ val objectAnimatorEgraPhonemicAwareness = ObjectAnimator.ofFloat(
+     egraPhonemicAwarenessContainer,
+     "rotation",
+     ...
+ )
```

</blockquote></details>

</blockquote></details>

<details>
<summary>📜 Review details</summary>

**Configuration used: CodeRabbit UI**
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<details>
<summary>📥 Commits</summary>

Reviewing files that changed from the base of the PR and between 3fb2f06f57d983258982a6e8f08de841967ff181 and b636c7d2887cd7f1104167e126bc4d63caa28e99.

</details>

<details>
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* `app/build.gradle` (1 hunks)
* `app/src/main/java/ai/elimu/launcher/ui/HomeScreensActivity.kt` (1 hunks)

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<details>
<summary>⏰ Context from checks skipped due to timeout of 90000ms (4)</summary>

* GitHub Check: build (windows-latest, 17)
* GitHub Check: build (windows-latest, 21)
* GitHub Check: build (ubuntu-latest, 17)
* GitHub Check: build (ubuntu-latest, 21)

</details>

<details>
<summary>🔇 Additional comments (5)</summary><blockquote>

<details>
<summary>app/build.gradle (1)</summary>

`34-34`: **Looks good to enable viewBinding.**  
This feature will facilitate safer references to views and reduce boilerplate in your Kotlin code.

</details>
<details>
<summary>app/src/main/java/ai/elimu/launcher/ui/HomeScreensActivity.kt (4)</summary>

`163-169`: **Check for deprecation in display metrics retrieval.**  
`defaultDisplay` is deprecated in the latest Android versions (API 30+). Consider migrating to `WindowManager#getCurrentWindowMetrics()` to achieve forward compatibility.

---

`414-414`: **Math.random().toInt() will always be 0.**  
This is a repeated issue noted in a prior review. Use a dedicated random integer generation, e.g., `(2..4).random().toFloat()`.

---

`471-474`: **Back button override confirmed.**  
Preventing back navigation is common in launcher apps. Implementation here successfully disables the back button.

---

`481-481`: **Avoid storing state in the companion object.**  
This echoes a previous review comment: persisting `applications` at the companion-object level can lead to stale data or memory leaks. Consider storing it as a property on the activity instance or a ViewModel.

</details>

</blockquote></details>

</details>

<!-- This is an auto-generated comment by CodeRabbit for review status -->
state: COMMENTED
author_association: NONE
submitted_at: 2025-04-02T23:59:04Z
user: login: coderabbitai[bot]
state: APPROVED
author_association: NONE
submitted_at: 2025-04-02T23:59:07Z
user: login: coderabbitai[bot]
body: **Actionable comments posted: 2**

<details>
<summary>♻️ Duplicate comments (1)</summary><blockquote>

<details>
<summary>app/src/main/java/ai/elimu/launcher/ui/HomeScreensActivity.kt (1)</summary><blockquote>

`417-449`: _⚠️ Potential issue_

** Randomly rotating views won't actually rotate.**

As mentioned in a prior review comment, `Math.random().toInt()` returns 0 for values in [0,1). Multiplying by 3 yields 0, so each animation always rotates by “2” degrees. Use Kotlin’s `Random`, for example:
```diff
- (2 + (Math.random().toInt() * 3)).toFloat()
+ (2..5).random().toFloat()
```
This ensures genuine variation in rotation.

</blockquote></details>

</blockquote></details>

<details>
<summary>🧹 Nitpick comments (5)</summary><blockquote>

<details>
<summary>app/src/main/java/ai/elimu/launcher/ui/HomeScreensActivity.kt (5)</summary><blockquote>

`41-41`: **Kotlin naming convention note.**

`private var mSectionsPagerAdapter: SectionsPagerAdapter?` is valid but unusual in Kotlin, where the `m` prefix is generally avoided. Consider renaming it to `sectionsPagerAdapter` for consistency with typical Kotlin style guidelines.

```diff
- private var mSectionsPagerAdapter: SectionsPagerAdapter? = null
+ private var sectionsPagerAdapter: SectionsPagerAdapter? = null
```

---

`50-52`: **Deprecation concern with `systemUiVisibility`.**

`systemUiVisibility` is deprecated in the newer Android APIs. The recommended alternative is to use window insets or the newer `WindowCompat` APIs. This may not be urgent, but consider updating to the modern approach for full-screen layouts.

---

`102-131`: **Cursor handling improvement.**

The current code manually iterates using `while (!isLast) { moveToNext() }`. Kotlin provides a `use` block to close the cursor automatically and can reduce manual cursor handling logic. For example:
```kotlin
cursor.use {
    while (moveToNext()) {
        val app = CursorToApplicationConverter.getApplication(it)
        applications.add(app)
    }
}
```
This ensures safety around closing the cursor and simplifies the approach.

---

`139-157`: **Recovery plan for missing app store.**

The fallback logic is good, prompting a download link. Just ensure you handle any scenario where the user dismisses the dialog or lacks connectivity. You might want to provide an alternative dialog button or re-invocation path to encourage the Appstore installation again later.

---

`217-221`: **Reflections on `resources.getIdentifier`.**

Using `getIdentifier` is convenient but can be error-prone if layout resource names change. Ensure test coverage or strong naming conventions so that changes to `fragment_home_screenX` resource IDs don’t break. Alternatively, referencing layout IDs directly (e.g., `R.layout.fragment_home_screen_1`) might be safer if the screen set is not highly dynamic.

</blockquote></details>

</blockquote></details>

<details>
<summary>📜 Review details</summary>

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<details>
<summary>📥 Commits</summary>

Reviewing files that changed from the base of the PR and between b636c7d2887cd7f1104167e126bc4d63caa28e99 and d4a5ddd8e78773a54e968d35ee97132f9855e864.

</details>

<details>
<summary>📒 Files selected for processing (3)</summary>

* `app/build.gradle` (2 hunks)
* `app/src/main/java/ai/elimu/launcher/ui/HomeScreensActivity.kt` (1 hunks)
* `gradle/libs.versions.toml` (2 hunks)

</details>

<details>
<summary>🚧 Files skipped from review as they are similar to previous changes (1)</summary>

* app/build.gradle

</details>

<details>
<summary>⏰ Context from checks skipped due to timeout of 90000ms (4)</summary>

* GitHub Check: build (windows-latest, 17)
* GitHub Check: build (windows-latest, 21)
* GitHub Check: build (ubuntu-latest, 17)
* GitHub Check: build (ubuntu-latest, 21)

</details>

<details>
<summary>🔇 Additional comments (3)</summary><blockquote>

<details>
<summary>gradle/libs.versions.toml (2)</summary>

`3-3`: **Library version addition looks good.**

You’ve introduced the `elimuCommonUtils` version reference (`1.0.5`). This appears to be a standalone addition and should not introduce conflicts. Ensure that this version is in sync with other related dependencies if any.

---

`17-17`: <details>
<summary>❓ Verification inconclusive</summary>

**Integration of the new `common-utils` library is consistent.**

By referencing the newly declared version for `elimu-common-utils`, you maintain a clean separation of concerns in the TOML configuration. Make sure the library is actually used in the code (e.g., classes or extension methods from it) so it doesn't become an unused dependency.

Please verify references to `elimu-common-utils` in the codebase:

---

🏁 Script executed:

```shell
#!/bin/bash
# Searching for potential references to elimu.common.utils classes or packages
rg 'com\.github\.elimu-ai\.common-utils' -A 5
```

Length of output: 47

---



</details>

Below is a new verification script to broaden our search for any usage of the new dependency. In the previous search the pattern for the fully qualified string returned no output, which may be because actual code references use different naming or import styles. Please run the following shell script to check for alternative identifiers (the alias and version reference defined in the TOML, as well as potential package or import patterns):

```shell
#!/bin/bash
echo "Searching for alias 'elimu-common-utils' in the repository..."
rg 'elimu-common-utils' -A 5

echo "Searching for version reference 'elimuCommonUtils' in the repository..."
rg 'elimuCommonUtils' -A 5

echo "Searching for potential package or import usage 'commonutils' in Java/Kotlin files..."
rg -tjava -tkt 'commonutils' -A 5
```

If these extended searches still return no results, please verify manually that classes or extension methods from the `common-utils` library are indeed used somewhere in the code. If the dependency isn’t referenced outside of the Gradle TOML, confirm whether it is intended for a future use, or consider removing it to avoid an unused dependency.

**Action Required: Verify Usage of `elimu-common-utils` Dependency**  
- The gradle/libs.versions.toml integration appears correct.  
- However, automated searches (using the original and extended search patterns) did not yield any references in the codebase.  
- Please manually inspect source files (including any Java/Kotlin files and build configurations) to ensure that the library is actually used.

</details>
<details>
<summary>app/src/main/java/ai/elimu/launcher/ui/HomeScreensActivity.kt (1)</summary>

`62-70`: **Potential confusion in right-to-left offset calculation.**

The `isRightToLeft` logic and width increment usage works, but you might want to verify on devices with RTL locales to confirm the background parallax aligns seamlessly. Minor boundary conditions (e.g., only 1 page) can behave unexpectedly if not tested.

</details>

</blockquote></details>

</details>

<!-- This is an auto-generated comment by CodeRabbit for review status -->
state: CHANGES_REQUESTED
author_association: NONE
submitted_at: 2025-04-03T00:16:18Z
user: login: jo-elimu
state: APPROVED
author_association: MEMBER
submitted_at: 2025-04-03T01:40:36Z
user: login: jo-elimu
body: @tuancoltech There is a lint error: https://github.com/elimu-ai/launcher/actions/runs/14231946273/job/39884224259?pr=96

```
  Lint found 3 errors, 155 warnings. First failure:

  C:\Users\Nya\GitHub\elimu-ai\launcher\app\src\main\java\ai\elimu\launcher\ui\HomeScreensActivity.kt:420: Error: Could not find property setter method setRotation on java.lang.Void [ObjectAnimatorBinding]
                  "rotation",
                  ~~~~~~~~~~
```
state: CHANGES_REQUESTED
author_association: MEMBER
submitted_at: 2025-04-03T01:46:39Z
user: login: coderabbitai[bot]
body: **Actionable comments posted: 0**

<details>
<summary>♻️ Duplicate comments (3)</summary><blockquote>

<details>
<summary>app/src/main/java/ai/elimu/launcher/ui/HomeScreensActivity.kt (3)</summary><blockquote>

`322-339`: _⚠️ Potential issue_

**Avoid potential crash by removing `!!` usage for `dialogTitle`.**
If both `literacySkill` and `numeracySkill` are null, `dialogTitle` remains `null` and calling `title(dialogTitle!!)` can crash. This issue mirrors a previous concern.



Consider providing a fallback. For example:

```diff
- .title(dialogTitle!!)
+ .title(dialogTitle ?: getString(R.string.default_title))
```

---

`419-428`: _⚠️ Potential issue_

**Use a proper random integer generator instead of `Math.random().toInt()`.**
As noted in a prior review, `(Math.random().toInt() * 3)` will always be 0, causing no rotation. This persists in all instances where a subtle animation is intended.



Here’s a suggested fix using the Kotlin range-based random:

```diff
-(2 + (Math.random().toInt() * 3)).toFloat()
+((2..4).random()).toFloat()
```


Also applies to: 430-442, 444-454

---

`494-495`: _🛠️ Refactor suggestion_

**Avoid storing mutable data in a `companion object` to prevent potential leaks or stale data.**
Placing `applications` in a static context can cause memory leaks if these references persist beyond the activity lifecycle, especially if they hold onto contexts or resources. This duplicates a past suggestion.



A recommended approach is to store `applications` in an Android ViewModel or a non-static field of the `Activity`.
```diff
- private val applications: MutableList<ApplicationGson> by lazy { mutableListOf() }
+ // Example: Move to an instance-level field or a ViewModel
```

</blockquote></details>

</blockquote></details>

<details>
<summary>🧹 Nitpick comments (3)</summary><blockquote>

<details>
<summary>app/src/main/java/ai/elimu/launcher/ui/HomeScreensActivity.kt (3)</summary><blockquote>

`107-129`: **Consider offloading the ContentProvider query to a background thread and externalizing user-facing strings.**
Fetching and processing large datasets from the ContentProvider on the main/UI thread can block the UI if the query takes a long time. Likewise, the hard-coded Toast messages ("cursor.getCount() == 0", "cursor == null") are not localized. Consider performing this query asynchronously (e.g., using coroutines or another asynchronous mechanism) and moving user-facing strings into string resources for localization.

---

`245-245`: **Address or remove TODOs.**
Multiple TODOs in the code indicate incomplete functionality or placeholders:
- Line 245: `// TODO: include LiteracySkill.LISTENING_COMPREHENSION`
- Lines 296-297: `// TODO for EGMA skills`
- Line 312: `// TODO`
- Line 314: `// TODO`
- Line 316: `// TODO`

Removing or resolving these TODOs will help maintain clarity about the intended functionality. 

Would you like assistance implementing any of these items or tracking them as future tasks?


Also applies to: 296-297, 312-312, 314-314, 316-316

---

`346-347`: **Remove or wire up `isTabletNavigationSkill` to avoid dead code.**
The placeholder boolean `isTabletNavigationSkill` is hard-coded to `false`, so its references have no effect. This might confuse future maintainers or indicate unfinished functionality.

</blockquote></details>

</blockquote></details>

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</details>

<details>
<summary>📒 Files selected for processing (1)</summary>

* `app/src/main/java/ai/elimu/launcher/ui/HomeScreensActivity.kt` (1 hunks)

</details>

<details>
<summary>⏰ Context from checks skipped due to timeout of 90000ms (4)</summary>

* GitHub Check: build (windows-latest, 21)
* GitHub Check: build (windows-latest, 17)
* GitHub Check: build (ubuntu-latest, 21)
* GitHub Check: build (ubuntu-latest, 17)

</details>

<details>
<summary>🔇 Additional comments (1)</summary><blockquote>

<details>
<summary>app/src/main/java/ai/elimu/launcher/ui/HomeScreensActivity.kt (1)</summary>

`482-488`: **Back press override is acceptable for a launcher.**
Overriding `onBackPressed` with an empty method is a common strategy in launcher apps to prevent navigation away from the activity. This implementation looks intentional and aligns with typical launcher requirements.

</details>

</blockquote></details>

</details>

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submitted_at: 2025-04-03T07:51:38Z

Review comments:
diff_hunk: @@ -0,0 +1,493 @@
+package ai.elimu.launcher.ui
+
+import ai.elimu.launcher.BuildConfig
+import ai.elimu.launcher.R
+import ai.elimu.launcher.util.CursorToApplicationConverter
+import ai.elimu.model.v2.enums.content.LiteracySkill
+import ai.elimu.model.v2.enums.content.NumeracySkill
+import ai.elimu.model.v2.gson.application.ApplicationGson
+import android.animation.ObjectAnimator
+import android.animation.ValueAnimator
+import android.annotation.SuppressLint
+import android.content.Intent
+import android.content.pm.PackageManager
+import android.graphics.Point
+import android.net.Uri
+import android.os.Bundle
+import android.text.TextUtils
+import android.util.DisplayMetrics
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.GridLayout
+import android.widget.ImageView
+import android.widget.Toast
+import androidx.appcompat.app.AppCompatActivity
+import androidx.constraintlayout.widget.ConstraintLayout
+import androidx.fragment.app.Fragment
+import androidx.viewpager2.adapter.FragmentStateAdapter
+import androidx.viewpager2.widget.ViewPager2
+import androidx.viewpager2.widget.ViewPager2.OnPageChangeCallback
+import com.afollestad.materialdialogs.GravityEnum
+import com.afollestad.materialdialogs.MaterialDialog
+import com.afollestad.materialdialogs.Theme
+import com.tbuonomo.viewpagerdotsindicator.DotsIndicator
+import timber.log.Timber
+import java.util.Locale
+
+class HomeScreensActivity : AppCompatActivity() {
+    private var mSectionsPagerAdapter: SectionsPagerAdapter? = null
+
+    private var background: View? = null
+
+    private var viewPager: ViewPager2? = null
+
+    private var dotIndicator: DotsIndicator? = null
+
+    private var isRightToLeft = false
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_home_screens)
+
+        window.decorView.systemUiVisibility =
+            View.SYSTEM_UI_FLAG_LAYOUT_STABLE or View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
+
+        // Check if the elimu.ai Appstore is already installed
+        checkIfAppstoreIsInstalled()
+
+        // Create the adapter that will return a fragment for each of the primary sections of the activity.
+        mSectionsPagerAdapter = SectionsPagerAdapter(this)
+
+        // Set up the ViewPager with the sections adapter.
+        viewPager = findViewById(R.id.container)
+        viewPager?.setAdapter(mSectionsPagerAdapter)
+
+        dotIndicator = findViewById(R.id.dotIndicator)
+
+        background = findViewById(R.id.background)
+
+        isRightToLeft =
+            TextUtils.getLayoutDirectionFromLocale(Locale.getDefault()) == View.LAYOUT_DIRECTION_RTL
+
+        //Increase the width of the background image to apply the parallax effect
+        updateBackgroundImageWidth()
+
+        val pageTranslation =
+            (displayWidth * WIDTH_INCREMENT / (mSectionsPagerAdapter!!.itemCount - 1)).toInt()
+
+        viewPager?.let {
+            it.registerOnPageChangeCallback(object : OnPageChangeCallback() {
+                override fun onPageScrolled(
+                    position: Int,
+                    positionOffset: Float,
+                    positionOffsetPixels: Int
+                ) {
+                    Timber.i("onPageScrolled")
+
+                    if (positionOffset >= -1 && positionOffset <= 1) {
+                        var translationX = -((position + positionOffset) * pageTranslation).toInt()
+
+                        if (isRightToLeft) {
+                            translationX = -(translationX + this@HomeScreensActivity.displayWidth * WIDTH_INCREMENT).toInt()
+                        }
+
+                        background?.setTranslationX(translationX.toFloat())
+                    }
+                }
+
+                override fun onPageSelected(position: Int) {
+                    Timber.i("onPageSelected")
+                }
+
+                override fun onPageScrollStateChanged(state: Int) {
+                    Timber.i("onPageScrollStateChanged")
+                }
+            })
+            dotIndicator?.attachTo(it)
+        }
+
+        // Fetch Applications from the Appstore's ContentProvider
+        val uri =
+            Uri.parse("content://" + BuildConfig.APPSTORE_APPLICATION_ID + ".provider.application_provider/applications")
+        Timber.i("uri: $uri")
+        val cursor = contentResolver.query(uri, null, null, null, null)
+        if (cursor != null) {
+            Timber.i("cursor.getCount(): " + cursor.count)
+            if (cursor.count > 0) {
+                var isLast = false
+                while (!isLast) {
+                    cursor.moveToNext()
+
+                    // Convert from database row to Gson
+                    val application = CursorToApplicationConverter.getApplication(cursor)
+
+                    applications.add(application)
+
+                    isLast = cursor.isLast
+                }
+                Timber.i("cursor.isClosed(): " + cursor.isClosed)
+                cursor.close()
+            } else {
+                Toast.makeText(applicationContext, "cursor.getCount() == 0", Toast.LENGTH_LONG)
+                    .show()
+            }
+        } else {
+            Toast.makeText(applicationContext, "cursor == null", Toast.LENGTH_LONG).show()
+        }
+        Timber.i("applications.size(): " + applications.size)
+    }
+
+    private fun checkIfAppstoreIsInstalled() {
+        try {
+            val packageInfoAppstore =
+                packageManager.getPackageInfo(BuildConfig.APPSTORE_APPLICATION_ID, 0)
+            Timber.i("packageInfoAppstore.versionCode: " + packageInfoAppstore.versionCode)
+        } catch (e: PackageManager.NameNotFoundException) {
+            Timber.w(null, e)
+            MaterialDialog.Builder(this)
+                .content(resources.getString(R.string.appstore_needed) + BuildConfig.APPSTORE_APPLICATION_ID)
+                .positiveText(resources.getString(R.string.download))
+                .onPositive { dialog, which ->
+                    val intent = Intent(
+                        Intent.ACTION_VIEW,
+                        Uri.parse(APPSTORE_DOWNLOAD_URL)
+                    )
+                    startActivity(intent)
+                }
+                .show()
+        }
+    }
+
+    private fun updateBackgroundImageWidth() {
+        val backgroundWidth = (displayWidth * (1 + WIDTH_INCREMENT)).toInt()
+        val layoutParams =
+            ConstraintLayout.LayoutParams(backgroundWidth, ViewGroup.LayoutParams.MATCH_PARENT)
+        background!!.layoutParams = layoutParams
+        if (isRightToLeft) {
+            background!!.translationX =
+                -(displayWidth * WIDTH_INCREMENT).toFloat()
+        }
+    }
+
+    private val displayWidth: Int
+        get() {
+            val displaySize = Point()
+            windowManager.defaultDisplay.getSize(displaySize)
+            return displaySize.x
+        }
+
+    class PlaceholderFragment : Fragment() {
+        // Skill: Tablet navigation
+        private var tabletNavigationContainer: ConstraintLayout? = null
+        private var tabletNavigationImageView: ImageView? = null
+
+
+        // Skills: EGRA
+        private var egraOralVocabularyContainer: ConstraintLayout? = null
+        private var egraOralVocabularyImageView: ImageView? = null
+
+        private var egraPhonemicAwarenessContainer: ConstraintLayout? = null
+        private var egraPhonemicAwarenessImageView: ImageView? = null
+
+        private var egraLetterIdentificationContainer: ConstraintLayout? = null
+        private var egraLetterIdentificationImageView: ImageView? = null
+
+        private var egraSyllableNamingContainer: ConstraintLayout? = null
+        private var egraSyllableNamingImageView: ImageView? = null
+
+
+        // Skills: EGMA
+        private var egmaOralCountingContainer: ConstraintLayout? = null
+        private var egmaOralCountingImageView: ImageView? = null
+
+        private var egmaNumberIdentificationContainer: ConstraintLayout? = null
+        private var egmaNumberIdentificationImageView: ImageView? = null
+
+        private var egmaMissingNumberContainer: ConstraintLayout? = null
+        private var egmaMissingNumberImageView: ImageView? = null
+
+
+        override fun onCreateView(
+            inflater: LayoutInflater, container: ViewGroup?,
+            savedInstanceState: Bundle?
+        ): View? {
+            Timber.i("onCreateView")
+
+            val sectionNumber = arguments?.getInt(ARG_SECTION_NUMBER)
+            Timber.i("sectionNumber: $sectionNumber")
+
+            val layoutIdentifier = resources.getIdentifier(
+                "fragment_home_screen$sectionNumber",
+                "layout",
+                activity?.packageName
+            )
+            val rootView = inflater.inflate(layoutIdentifier, container, false)
+
+            if (sectionNumber == 1) {
+                // 1. Tablet navigation
+
+                tabletNavigationContainer = rootView.findViewById(R.id.tabletNavigationContainer)
+                tabletNavigationImageView = rootView.findViewById(R.id.tabletNavigationImageView)
+                tabletNavigationImageView?.setOnClickListener(View.OnClickListener {
+                    Timber.i("tabletNavigationImageView onClick")
+                    // Tablet Navigation
+                    //                        initializeDialog(null, null);
+                    initializeDialog(null, NumeracySkill.SHAPE_IDENTIFICATION)
+                })
+
+
+                // 2. EGRA skills
+                egraOralVocabularyContainer =
+                    rootView.findViewById(R.id.egraOralVocabularyContainer)
+                egraOralVocabularyImageView =
+                    rootView.findViewById(R.id.egraOralVocabularyImageView)
+                egraOralVocabularyImageView?.setOnClickListener(View.OnClickListener {
+                    Timber.i("egraOralVocabularyImageView onClick")
+                    // Oral Vocabulary and Listening Comprehension
+                    // TODO: include LiteracySkill.LISTENING_COMPREHENSION
+                    initializeDialog(LiteracySkill.ORAL_VOCABULARY, null)
+                })
+
+                egraPhonemicAwarenessContainer =
+                    rootView.findViewById(R.id.egraPhonemicAwarenessContainer)
+                egraPhonemicAwarenessImageView =
+                    rootView.findViewById(R.id.egraPhonemicAwarenessImageView)
+                egraPhonemicAwarenessImageView?.setOnClickListener(View.OnClickListener {
+                    Timber.i("egraPhonemicAwarenessImageView onClick")
+                    // Phonemic Awareness
+                    initializeDialog(LiteracySkill.PHONEMIC_AWARENESS, null)
+                })
+
+                egraLetterIdentificationContainer =
+                    rootView.findViewById(R.id.egraLetterIdentificationContainer)
+                egraLetterIdentificationImageView =
+                    rootView.findViewById(R.id.egraLetterIdentificationImageView)
+                egraLetterIdentificationImageView?.setOnClickListener(View.OnClickListener {
+                    Timber.i("egraLetterIdentificationImageView onClick")
+                    // Letter Identification
+                    initializeDialog(LiteracySkill.LETTER_IDENTIFICATION, null)
+                })
+
+
+                // 3. EGMA skills
+                egmaOralCountingContainer = rootView.findViewById(R.id.egmaOralCountingContainer)
+                egmaOralCountingImageView = rootView.findViewById(R.id.egmaOralCountingImageView)
+                egmaOralCountingImageView?.setOnClickListener(View.OnClickListener {
+                    Timber.i("egmaOralCountingImageView onClick")
+                    // Oral Counting
+                    initializeDialog(null, NumeracySkill.ORAL_COUNTING)
+                })
+
+                egmaNumberIdentificationContainer =
+                    rootView.findViewById(R.id.egmaNumberIdentificationContainer)
+                egmaNumberIdentificationImageView =
+                    rootView.findViewById(R.id.egmaNumberIdentificationImageView)
+                egmaNumberIdentificationImageView?.setOnClickListener(View.OnClickListener {
+                    Timber.i("egmaNumberIdentificationImageView onClick")
+                    // Number Identification
+                    initializeDialog(null, NumeracySkill.NUMBER_IDENTIFICATION)
+                })
+
+                egmaMissingNumberContainer = rootView.findViewById(R.id.egmaMissingNumberContainer)
+                egmaMissingNumberImageView = rootView.findViewById(R.id.egmaMissingNumberImageView)
+                egmaMissingNumberImageView?.setOnClickListener(View.OnClickListener {
+                    Timber.i("egmaMissingNumberImageView onClick")
+                    // Missing Number and Quantity Discrimination
+                    initializeDialog(null, NumeracySkill.MISSING_NUMBER)
+                })
+            } else if (sectionNumber == 2) {
+                // 1. EGRA skills
+
+                egraSyllableNamingContainer =
+                    rootView.findViewById(R.id.egraSyllableNamingContainer)
+                egraSyllableNamingImageView =
+                    rootView.findViewById(R.id.egraSyllableNamingImageView)
+                egraSyllableNamingImageView?.setOnClickListener(View.OnClickListener {
+                    Timber.i("egraSyllableNamingImageView onClick")
+                    // Syllable Naming and Familiar Word Reading
+                    initializeDialog(LiteracySkill.FAMILIAR_WORD_READING, null)
+                })
+
+
+                // 2. EGMA skills
+
+                // TODO
+            } else if (sectionNumber == 3) {
+                // TODO
+            } else if (sectionNumber == 4) {
+                // TODO
+            }
+
+            return rootView
+        }
+
+        private fun initializeDialog(literacySkill: LiteracySkill?, numeracySkill: NumeracySkill?) {
+            Timber.i("initializeDialog")
+
+            var dialogTitle: String? = null
+            if (false) { // TODO
+                dialogTitle = "TABLET_NAVIGATION" // TODO
+            } else if (literacySkill != null) {
+                dialogTitle = literacySkill.toString()
+            } else if (numeracySkill != null) {
+                dialogTitle = numeracySkill.toString()
+            }
+
+            val materialDialog = MaterialDialog.Builder(requireContext())
+                .customView(R.layout.dialog_apps, true)
+                .theme(Theme.DARK)
+                .title(dialogTitle!!)
+                .titleGravity(GravityEnum.CENTER)
+                .show()
+
+            val customView = materialDialog.customView
+            val appGridLayout = customView!!.findViewById<GridLayout>(R.id.appGridLayout)
+
+            for (application in applications!!) {
+                Timber.i("application.getPackageName(): " + application.packageName)
+                val isTabletNavigationSkill = false // TODO
+                Timber.i("isTabletNavigationSkill: $isTabletNavigationSkill")
+                val isLiteracySkill = application.literacySkills.contains(literacySkill)
+                Timber.i("isLiteracySkill: $isLiteracySkill")
+                val isNumeracySkill = application.numeracySkills.contains(numeracySkill)
+                Timber.i("isNumeracySkill: $isNumeracySkill")
+                if (isTabletNavigationSkill || isLiteracySkill || isNumeracySkill) {
+                    // Add Application to dialog
+
+                    // Check if the Application is already installed. If not, skip it.
+
+                    try {
+                        val packageInfoAppstore =
+                            requireContext().packageManager.getPackageInfo(application.packageName, 0)
+                        Timber.i("packageInfoAppstore.versionCode: " + packageInfoAppstore.versionCode)
+                    } catch (e: PackageManager.NameNotFoundException) {
+                        Timber.i(
+                            e,
+                            "The Application has not been installed: " + application.packageName
+                        )
+                        continue
+                    }
+
+                    val appView = LayoutInflater.from(activity)
+                        .inflate(R.layout.dialog_apps_app_view, appGridLayout, false)
+
+                    // Set app icon
+                    val appIconImageView = appView.findViewById<ImageView>(R.id.appIconImageView)
+                    val packageManager = activity?.packageManager ?: return
+                    try {
+                        val applicationInfo = packageManager.getApplicationInfo(
+                            application.packageName,
+                            PackageManager.GET_META_DATA
+                        )
+                        val resources =
+                            packageManager.getResourcesForApplication(application.packageName)
+                        val icon = resources.getDrawableForDensity(
+                            applicationInfo.icon,
+                            DisplayMetrics.DENSITY_XXHIGH,
+                            null
+                        )
+                        appIconImageView.setImageDrawable(icon)
+                    } catch (e: PackageManager.NameNotFoundException) {
+                        Timber.e(e)
+                    }
+
+                    // Open Application when pressing app icon
+                    appIconImageView.setOnClickListener {
+                        Timber.i("appIconImageView onClick")
+                        val intent =
+                            packageManager.getLaunchIntentForPackage(application.packageName)
+                        intent!!.addCategory(Intent.CATEGORY_LAUNCHER)
+                        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED)
+                        startActivity(intent)
+                        //                            EventTracker.reportApplicationOpenedEvent(getContext(), activityInfo.packageName);
+                    }
+
+                    appGridLayout.addView(appView)
+                }
+            }
+        }
+
+        override fun onStart() {
+            Timber.i("onCreateView")
+            super.onStart()
+        }
+
+        override fun onResume() {
+            Timber.i("onResume")
+            super.onResume()
+
+            // Add subtle movements to the space ships
+            val objectAnimatorEGRA = ObjectAnimator.ofFloat(
+                egraOralVocabularyContainer,
+                "rotation",
+                (2 + (Math.random().toInt() * 3)).toFloat()
+            )
+            objectAnimatorEGRA.setDuration((1000 + (Math.random().toInt() * 1000)).toLong())
+            objectAnimatorEGRA.repeatCount = ValueAnimator.INFINITE
+            objectAnimatorEGRA.repeatMode = ValueAnimator.REVERSE
+            objectAnimatorEGRA.start()
+
+            val objectAnimatorEgmaPhonemicAwareness = ObjectAnimator.ofFloat(
+                egraPhonemicAwarenessContainer,
+                "rotation",
+                (2 + (Math.random().toInt() * 3)).toFloat()
+            )
+            objectAnimatorEgmaPhonemicAwareness.setDuration(
+                (1000 + (Math.random().toInt() * 1000)).toLong()
+            )
+            objectAnimatorEgmaPhonemicAwareness.repeatCount = ValueAnimator.INFINITE
+            objectAnimatorEgmaPhonemicAwareness.repeatMode = ValueAnimator.REVERSE
+            objectAnimatorEgmaPhonemicAwareness.start()
+
+            val objectAnimatorEGMA = ObjectAnimator.ofFloat(
+                egmaOralCountingContainer,
+                "rotation",
+                (2 + (Math.random().toInt() * 3)).toFloat()
+            )
+            objectAnimatorEGMA.setDuration((1000 + (Math.random().toInt() * 1000)).toLong())
+            objectAnimatorEGMA.repeatCount = ValueAnimator.INFINITE
+            objectAnimatorEGMA.repeatMode = ValueAnimator.REVERSE
+            objectAnimatorEGMA.start()
+        }
path: app/src/main/java/ai/elimu/launcher/ui/HomeScreensActivity.kt
user: login: coderabbitai[bot]
body: _⚠️ Potential issue_

**`Math.random().toInt()` will always be 0.**  
Because `Math.random()` returns a Double between 0.0 and 1.0, converting to `Int` yields 0, negating the random effect. Consider using a random integer approach.  

```diff
- val objectAnimatorEGRA = ObjectAnimator.ofFloat(
-     egraOralVocabularyContainer,
-     "rotation",
-     (2 + (Math.random().toInt() * 3)).toFloat()
- )
+ val randomValue = (2..5).random().toFloat() // e.g. 2 through 5
+ val objectAnimatorEGRA = ObjectAnimator.ofFloat(
+     egraOralVocabularyContainer,
+     "rotation",
+     randomValue
+ )
```


<!-- suggestion_start -->

<details>
<summary>📝 Committable suggestion</summary>

> ‼️ **IMPORTANT**
> Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

`````suggestion
            // Add subtle movements to the space ships
            val randomValue = (2..5).random().toFloat() // e.g. 2 through 5
            val objectAnimatorEGRA = ObjectAnimator.ofFloat(
                egraOralVocabularyContainer,
                "rotation",
                randomValue
            )
            objectAnimatorEGRA.setDuration((1000 + (Math.random().toInt() * 1000)).toLong())
            objectAnimatorEGRA.repeatCount = ValueAnimator.INFINITE
            objectAnimatorEGRA.repeatMode = ValueAnimator.REVERSE
            objectAnimatorEGRA.start()

            val objectAnimatorEgmaPhonemicAwareness = ObjectAnimator.ofFloat(
                egraPhonemicAwarenessContainer,
                "rotation",
                (2 + (Math.random().toInt() * 3)).toFloat()
            )
            objectAnimatorEgmaPhonemicAwareness.setDuration(
                (1000 + (Math.random().toInt() * 1000)).toLong()
            )
            objectAnimatorEgmaPhonemicAwareness.repeatCount = ValueAnimator.INFINITE
            objectAnimatorEgmaPhonemicAwareness.repeatMode = ValueAnimator.REVERSE
            objectAnimatorEgmaPhonemicAwareness.start()

            val objectAnimatorEGMA = ObjectAnimator.ofFloat(
                egmaOralCountingContainer,
                "rotation",
                (2 + (Math.random().toInt() * 3)).toFloat()
            )
            objectAnimatorEGMA.setDuration((1000 + (Math.random().toInt() * 1000)).toLong())
            objectAnimatorEGMA.repeatCount = ValueAnimator.INFINITE
            objectAnimatorEGMA.repeatMode = ValueAnimator.REVERSE
            objectAnimatorEGMA.start()
`````

</details>

<!-- suggestion_end -->

<!-- This is an auto-generated comment by CodeRabbit -->

✅ Addressed in commit b636c7d
created_at: 2025-04-02T23:50:42Z
author_association: NONE
diff_hunk: @@ -0,0 +1,493 @@
+package ai.elimu.launcher.ui
+
+import ai.elimu.launcher.BuildConfig
+import ai.elimu.launcher.R
+import ai.elimu.launcher.util.CursorToApplicationConverter
+import ai.elimu.model.v2.enums.content.LiteracySkill
+import ai.elimu.model.v2.enums.content.NumeracySkill
+import ai.elimu.model.v2.gson.application.ApplicationGson
+import android.animation.ObjectAnimator
+import android.animation.ValueAnimator
+import android.annotation.SuppressLint
+import android.content.Intent
+import android.content.pm.PackageManager
+import android.graphics.Point
+import android.net.Uri
+import android.os.Bundle
+import android.text.TextUtils
+import android.util.DisplayMetrics
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.GridLayout
+import android.widget.ImageView
+import android.widget.Toast
+import androidx.appcompat.app.AppCompatActivity
+import androidx.constraintlayout.widget.ConstraintLayout
+import androidx.fragment.app.Fragment
+import androidx.viewpager2.adapter.FragmentStateAdapter
+import androidx.viewpager2.widget.ViewPager2
+import androidx.viewpager2.widget.ViewPager2.OnPageChangeCallback
+import com.afollestad.materialdialogs.GravityEnum
+import com.afollestad.materialdialogs.MaterialDialog
+import com.afollestad.materialdialogs.Theme
+import com.tbuonomo.viewpagerdotsindicator.DotsIndicator
+import timber.log.Timber
+import java.util.Locale
+
+class HomeScreensActivity : AppCompatActivity() {
+    private var mSectionsPagerAdapter: SectionsPagerAdapter? = null
+
+    private var background: View? = null
+
+    private var viewPager: ViewPager2? = null
+
+    private var dotIndicator: DotsIndicator? = null
+
+    private var isRightToLeft = false
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContentView(R.layout.activity_home_screens)
+
+        window.decorView.systemUiVisibility =
+            View.SYSTEM_UI_FLAG_LAYOUT_STABLE or View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
+
+        // Check if the elimu.ai Appstore is already installed
+        checkIfAppstoreIsInstalled()
+
+        // Create the adapter that will return a fragment for each of the primary sections of the activity.
+        mSectionsPagerAdapter = SectionsPagerAdapter(this)
+
+        // Set up the ViewPager with the sections adapter.
+        viewPager = findViewById(R.id.container)
+        viewPager?.setAdapter(mSectionsPagerAdapter)
+
+        dotIndicator = findViewById(R.id.dotIndicator)
+
+        background = findViewById(R.id.background)
+
+        isRightToLeft =
+            TextUtils.getLayoutDirectionFromLocale(Locale.getDefault()) == View.LAYOUT_DIRECTION_RTL
+
+        //Increase the width of the background image to apply the parallax effect
+        updateBackgroundImageWidth()
+
+        val pageTranslation =
+            (displayWidth * WIDTH_INCREMENT / (mSectionsPagerAdapter!!.itemCount - 1)).toInt()
+
+        viewPager?.let {
+            it.registerOnPageChangeCallback(object : OnPageChangeCallback() {
+                override fun onPageScrolled(
+                    position: Int,
+                    positionOffset: Float,
+                    positionOffsetPixels: Int
+                ) {
+                    Timber.i("onPageScrolled")
+
+                    if (positionOffset >= -1 && positionOffset <= 1) {
+                        var translationX = -((position + positionOffset) * pageTranslation).toInt()
+
+                        if (isRightToLeft) {
+                            translationX = -(translationX + this@HomeScreensActivity.displayWidth * WIDTH_INCREMENT).toInt()
+                        }
+
+                        background?.setTranslationX(translationX.toFloat())
+                    }
+                }
+
+                override fun onPageSelected(position: Int) {
+                    Timber.i("onPageSelected")
+                }
+
+                override fun onPageScrollStateChanged(state: Int) {
+                    Timber.i("onPageScrollStateChanged")
+                }
+            })
+            dotIndicator?.attachTo(it)
+        }
+
+        // Fetch Applications from the Appstore's ContentProvider
+        val uri =
+            Uri.parse("content://" + BuildConfig.APPSTORE_APPLICATION_ID + ".provider.application_provider/applications")
+        Timber.i("uri: $uri")
+        val cursor = contentResolver.query(uri, null, null, null, null)
+        if (cursor != null) {
+            Timber.i("cursor.getCount(): " + cursor.count)
+            if (cursor.count > 0) {
+                var isLast = false
+                while (!isLast) {
+                    cursor.moveToNext()
+
+                    // Convert from database row to Gson
+                    val application = CursorToApplicationConverter.getApplication(cursor)
+
+                    applications.add(application)
+
+                    isLast = cursor.isLast
+                }
+                Timber.i("cursor.isClosed(): " + cursor.isClosed)
+                cursor.close()
+            } else {
+                Toast.makeText(applicationContext, "cursor.getCount() == 0", Toast.LENGTH_LONG)
+                    .show()
+            }
+        } else {
+            Toast.makeText(applicationContext, "cursor == null", Toast.LENGTH_LONG).show()
+        }
+        Timber.i("applications.size(): " + applications.size)
+    }
+
+    private fun checkIfAppstoreIsInstalled() {
+        try {
+            val packageInfoAppstore =
+                packageManager.getPackageInfo(BuildConfig.APPSTORE_APPLICATION_ID, 0)
+            Timber.i("packageInfoAppstore.versionCode: " + packageInfoAppstore.versionCode)
+        } catch (e: PackageManager.NameNotFoundException) {
+            Timber.w(null, e)
+            MaterialDialog.Builder(this)
+                .content(resources.getString(R.string.appstore_needed) + BuildConfig.APPSTORE_APPLICATION_ID)
+                .positiveText(resources.getString(R.string.download))
+                .onPositive { dialog, which ->
+                    val intent = Intent(
+                        Intent.ACTION_VIEW,
+                        Uri.parse(APPSTORE_DOWNLOAD_URL)
+                    )
+                    startActivity(intent)
+                }
+                .show()
+        }
+    }
+
+    private fun updateBackgroundImageWidth() {
+        val backgroundWidth = (displayWidth * (1 + WIDTH_INCREMENT)).toInt()
+        val layoutParams =
+            ConstraintLayout.LayoutParams(backgroundWidth, ViewGroup.LayoutParams.MATCH_PARENT)
+        background!!.layoutParams = layoutParams
+        if (isRightToLeft) {
+            background!!.translationX =
+                -(displayWidth * WIDTH_INCREMENT).toFloat()
+        }
+    }
+
+    private val displayWidth: Int
+        get() {
+            val displaySize = Point()
+            windowManager.defaultDisplay.getSize(displaySize)
+            return displaySize.x
+        }
+
+    class PlaceholderFragment : Fragment() {
+        // Skill: Tablet navigation
+        private var tabletNavigationContainer: ConstraintLayout? = null
+        private var tabletNavigationImageView: ImageView? = null
+
+
+        // Skills: EGRA
+        private var egraOralVocabularyContainer: ConstraintLayout? = null
+        private var egraOralVocabularyImageView: ImageView? = null
+
+        private var egraPhonemicAwarenessContainer: ConstraintLayout? = null
+        private var egraPhonemicAwarenessImageView: ImageView? = null
+
+        private var egraLetterIdentificationContainer: ConstraintLayout? = null
+        private var egraLetterIdentificationImageView: ImageView? = null
+
+        private var egraSyllableNamingContainer: ConstraintLayout? = null
+        private var egraSyllableNamingImageView: ImageView? = null
+
+
+        // Skills: EGMA
+        private var egmaOralCountingContainer: ConstraintLayout? = null
+        private var egmaOralCountingImageView: ImageView? = null
+
+        private var egmaNumberIdentificationContainer: ConstraintLayout? = null
+        private var egmaNumberIdentificationImageView: ImageView? = null
+
+        private var egmaMissingNumberContainer: ConstraintLayout? = null
+        private var egmaMissingNumberImageView: ImageView? = null
+
+
+        override fun onCreateView(
+            inflater: LayoutInflater, container: ViewGroup?,
+            savedInstanceState: Bundle?
+        ): View? {
+            Timber.i("onCreateView")
+
+            val sectionNumber = arguments?.getInt(ARG_SECTION_NUMBER)
+            Timber.i("sectionNumber: $sectionNumber")
+
+            val layoutIdentifier = resources.getIdentifier(
+                "fragment_home_screen$sectionNumber",
+                "layout",
+                activity?.packageName
+            )
+            val rootView = inflater.inflate(layoutIdentifier, container, false)
+
+            if (sectionNumber == 1) {
+                // 1. Tablet navigation
+
+                tabletNavigationContainer = rootView.findViewById(R.id.tabletNavigationContainer)
+                tabletNavigationImageView = rootView.findViewById(R.id.tabletNavigationImageView)
+                tabletNavigationImageView?.setOnClickListener(View.OnClickListener {
+                    Timber.i("tabletNavigationImageView onClick")
+                    // Tablet Navigation
+                    //                        initializeDialog(null, null);
+                    initializeDialog(null, NumeracySkill.SHAPE_IDENTIFICATION)
+                })
+
+
+                // 2. EGRA skills
+                egraOralVocabularyContainer =
+                    rootView.findViewById(R.id.egraOralVocabularyContainer)
+                egraOralVocabularyImageView =
+                    rootView.findViewById(R.id.egraOralVocabularyImageView)
+                egraOralVocabularyImageView?.setOnClickListener(View.OnClickListener {
+                    Timber.i("egraOralVocabularyImageView onClick")
+                    // Oral Vocabulary and Listening Comprehension
+                    // TODO: include LiteracySkill.LISTENING_COMPREHENSION
+                    initializeDialog(LiteracySkill.ORAL_VOCABULARY, null)
+                })
+
+                egraPhonemicAwarenessContainer =
+                    rootView.findViewById(R.id.egraPhonemicAwarenessContainer)
+                egraPhonemicAwarenessImageView =
+                    rootView.findViewById(R.id.egraPhonemicAwarenessImageView)
+                egraPhonemicAwarenessImageView?.setOnClickListener(View.OnClickListener {
+                    Timber.i("egraPhonemicAwarenessImageView onClick")
+                    // Phonemic Awareness
+                    initializeDialog(LiteracySkill.PHONEMIC_AWARENESS, null)
+                })
+
+                egraLetterIdentificationContainer =
+                    rootView.findViewById(R.id.egraLetterIdentificationContainer)
+                egraLetterIdentificationImageView =
+                    rootView.findViewById(R.id.egraLetterIdentificationImageView)
+                egraLetterIdentificationImageView?.setOnClickListener(View.OnClickListener {
+                    Timber.i("egraLetterIdentificationImageView onClick")
+                    // Letter Identification
+                    initializeDialog(LiteracySkill.LETTER_IDENTIFICATION, null)
+                })
+
+
+                // 3. EGMA skills
+                egmaOralCountingContainer = rootView.findViewById(R.id.egmaOralCountingContainer)
+                egmaOralCountingImageView = rootView.findViewById(R.id.egmaOralCountingImageView)
+                egmaOralCountingImageView?.setOnClickListener(View.OnClickListener {
+                    Timber.i("egmaOralCountingImageView onClick")
+                    // Oral Counting
+                    initializeDialog(null, NumeracySkill.ORAL_COUNTING)
+                })
+
+                egmaNumberIdentificationContainer =
+                    rootView.findViewById(R.id.egmaNumberIdentificationContainer)
+                egmaNumberIdentificationImageView =
+                    rootView.findViewById(R.id.egmaNumberIdentificationImageView)
+                egmaNumberIdentificationImageView?.setOnClickListener(View.OnClickListener {
+                    Timber.i("egmaNumberIdentificationImageView onClick")
+                    // Number Identification
+                    initializeDialog(null, NumeracySkill.NUMBER_IDENTIFICATION)
+                })
+
+                egmaMissingNumberContainer = rootView.findViewById(R.id.egmaMissingNumberContainer)
+                egmaMissingNumberImageView = rootView.findViewById(R.id.egmaMissingNumberImageView)
+                egmaMissingNumberImageView?.setOnClickListener(View.OnClickListener {
+                    Timber.i("egmaMissingNumberImageView onClick")
+                    // Missing Number and Quantity Discrimination
+                    initializeDialog(null, NumeracySkill.MISSING_NUMBER)
+                })
+            } else if (sectionNumber == 2) {
+                // 1. EGRA skills
+
+                egraSyllableNamingContainer =
+                    rootView.findViewById(R.id.egraSyllableNamingContainer)
+                egraSyllableNamingImageView =
+                    rootView.findViewById(R.id.egraSyllableNamingImageView)
+                egraSyllableNamingImageView?.setOnClickListener(View.OnClickListener {
+                    Timber.i("egraSyllableNamingImageView onClick")
+                    // Syllable Naming and Familiar Word Reading
+                    initializeDialog(LiteracySkill.FAMILIAR_WORD_READING, null)
+                })
+
+
+                // 2. EGMA skills
+
+                // TODO
+            } else if (sectionNumber == 3) {
+                // TODO
+            } else if (sectionNumber == 4) {
+                // TODO
+            }
+
+            return rootView
+        }
+
+        private fun initializeDialog(literacySkill: LiteracySkill?, numeracySkill: NumeracySkill?) {
+            Timber.i("initializeDialog")
+
+            var dialogTitle: String? = null
+            if (false) { // TODO
+                dialogTitle = "TABLET_NAVIGATION" // TODO
+            } else if (literacySkill != null) {
+                dialogTitle = literacySkill.toString()
+            } else if (numeracySkill != null) {
+                dialogTitle = numeracySkill.toString()
+            }
+
+            val materialDialog = MaterialDialog.Builder(requireContext())
+                .customView(R.layout.dialog_apps, true)
+                .theme(Theme.DARK)
+                .title(dialogTitle!!)
+                .titleGravity(GravityEnum.CENTER)
+                .show()
+
+            val customView = materialDialog.customView
+            val appGridLayout = customView!!.findViewById<GridLayout>(R.id.appGridLayout)
+
+            for (application in applications!!) {
+                Timber.i("application.getPackageName(): " + application.packageName)
+                val isTabletNavigationSkill = false // TODO
+                Timber.i("isTabletNavigationSkill: $isTabletNavigationSkill")
+                val isLiteracySkill = application.literacySkills.contains(literacySkill)
+                Timber.i("isLiteracySkill: $isLiteracySkill")
+                val isNumeracySkill = application.numeracySkills.contains(numeracySkill)
+                Timber.i("isNumeracySkill: $isNumeracySkill")
+                if (isTabletNavigationSkill || isLiteracySkill || isNumeracySkill) {
+                    // Add Application to dialog
+
+                    // Check if the Application is already installed. If not, skip it.
+
+                    try {
+                        val packageInfoAppstore =
+                            requireContext().packageManager.getPackageInfo(application.packageName, 0)
+                        Timber.i("packageInfoAppstore.versionCode: " + packageInfoAppstore.versionCode)
+                    } catch (e: PackageManager.NameNotFoundException) {
+                        Timber.i(
+                            e,
+                            "The Application has not been installed: " + application.packageName
+                        )
+                        continue
+                    }
+
+                    val appView = LayoutInflater.from(activity)
+                        .inflate(R.layout.dialog_apps_app_view, appGridLayout, false)
+
+                    // Set app icon
+                    val appIconImageView = appView.findViewById<ImageView>(R.id.appIconImageView)
+                    val packageManager = activity?.packageManager ?: return
+                    try {
+                        val applicationInfo = packageManager.getApplicationInfo(
+                            application.packageName,
+                            PackageManager.GET_META_DATA
+                        )
+                        val resources =
+                            packageManager.getResourcesForApplication(application.packageName)
+                        val icon = resources.getDrawableForDensity(
+                            applicationInfo.icon,
+                            DisplayMetrics.DENSITY_XXHIGH,
+                            null
+                        )
+                        appIconImageView.setImageDrawable(icon)
+                    } catch (e: PackageManager.NameNotFoundException) {
+                        Timber.e(e)
+                    }
+
+                    // Open Application when pressing app icon
+                    appIconImageView.setOnClickListener {
+                        Timber.i("appIconImageView onClick")
+                        val intent =
+                            packageManager.getLaunchIntentForPackage(application.packageName)
+                        intent!!.addCategory(Intent.CATEGORY_LAUNCHER)
+                        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED)
+                        startActivity(intent)
+                        //                            EventTracker.reportApplicationOpenedEvent(getContext(), activityInfo.packageName);
+                    }
+
+                    appGridLayout.addView(appView)
+                }
+            }
+        }
+
+        override fun onStart() {
+            Timber.i("onCreateView")
+            super.onStart()
+        }
+
+        override fun onResume() {
+            Timber.i("onResume")
+            super.onResume()
+
+            // Add subtle movements to the space ships
+            val objectAnimatorEGRA = ObjectAnimator.ofFloat(
+                egraOralVocabularyContainer,
+                "rotation",
+                (2 + (Math.random().toInt() * 3)).toFloat()
+            )
+            objectAnimatorEGRA.setDuration((1000 + (Math.random().toInt() * 1000)).toLong())
+            objectAnimatorEGRA.repeatCount = ValueAnimator.INFINITE
+            objectAnimatorEGRA.repeatMode = ValueAnimator.REVERSE
+            objectAnimatorEGRA.start()
+
+            val objectAnimatorEgmaPhonemicAwareness = ObjectAnimator.ofFloat(
+                egraPhonemicAwarenessContainer,
+                "rotation",
+                (2 + (Math.random().toInt() * 3)).toFloat()
+            )
+            objectAnimatorEgmaPhonemicAwareness.setDuration(
+                (1000 + (Math.random().toInt() * 1000)).toLong()
+            )
+            objectAnimatorEgmaPhonemicAwareness.repeatCount = ValueAnimator.INFINITE
+            objectAnimatorEgmaPhonemicAwareness.repeatMode = ValueAnimator.REVERSE
+            objectAnimatorEgmaPhonemicAwareness.start()
+
+            val objectAnimatorEGMA = ObjectAnimator.ofFloat(
+                egmaOralCountingContainer,
+                "rotation",
+                (2 + (Math.random().toInt() * 3)).toFloat()
+            )
+            objectAnimatorEGMA.setDuration((1000 + (Math.random().toInt() * 1000)).toLong())
+            objectAnimatorEGMA.repeatCount = ValueAnimator.INFINITE
+            objectAnimatorEGMA.repeatMode = ValueAnimator.REVERSE
+            objectAnimatorEGMA.start()
+        }
+
+        companion object {
+            private const val ARG_SECTION_NUMBER = "section_number"
+
+
+            fun newInstance(sectionNumber: Int): PlaceholderFragment {
+                val fragment = PlaceholderFragment()
+                val args = Bundle()
+                args.putInt(ARG_SECTION_NUMBER, sectionNumber)
+                fragment.arguments = args
+                return fragment
+            }
+        }
+    }
+
+    class SectionsPagerAdapter(activity: AppCompatActivity) : FragmentStateAdapter(activity) {
+        override fun createFragment(position: Int): Fragment {
+            return PlaceholderFragment.newInstance(position + 1)
+        }
+
+        override fun getItemCount(): Int {
+            return 4
+        }
+    }
+
+
+    @SuppressLint("MissingSuperCall")
+    override fun onBackPressed() {
+        Timber.i("onBackPressed")
+
+        // Do nothing
+    }
+
+    companion object {
+        private const val APPSTORE_DOWNLOAD_URL = "https://github.com/elimu-ai/appstore/releases"
+
+        const val WIDTH_INCREMENT: Double = 0.1
+
+        private val applications: MutableList<ApplicationGson> by lazy { mutableListOf() }
path: app/src/main/java/ai/elimu/launcher/ui/HomeScreensActivity.kt
user: login: coderabbitai[bot]
body: _🛠️ Refactor suggestion_

**Consider scoping `applications` at the instance level, not globally.**  
`applications` is located in a `companion object` and can persist data between different instances of `HomeScreensActivity`. This can lead to stale or inconsistent data.  

```diff
- private val applications: MutableList<ApplicationGson> by lazy { mutableListOf() }
+ private val applications: MutableList<ApplicationGson> = mutableListOf()
  // Move this field out of companion object into the activity class if needed.
```


<!-- suggestion_start -->

<details>
<summary>📝 Committable suggestion</summary>

> ‼️ **IMPORTANT**
> Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

`````suggestion
        private val applications: MutableList<ApplicationGson> = mutableListOf()
        // Move this field out of companion object into the activity class if needed.
`````

</details>

<!-- suggestion_end -->

<!-- This is an auto-generated comment by CodeRabbit -->

✅ Addressed in commit b636c7d
created_at: 2025-04-02T23:50:42Z
author_association: NONE
diff_hunk: @@ -0,0 +1,490 @@
+package ai.elimu.launcher.ui
+
+import ai.elimu.common.utils.ui.setLightStatusBar
+import ai.elimu.common.utils.ui.setStatusBarColorCompat
+import ai.elimu.launcher.BuildConfig
+import ai.elimu.launcher.R
+import ai.elimu.launcher.databinding.ActivityHomeScreensBinding
+import ai.elimu.launcher.util.CursorToApplicationConverter
+import ai.elimu.model.v2.enums.content.LiteracySkill
+import ai.elimu.model.v2.enums.content.NumeracySkill
+import ai.elimu.model.v2.gson.application.ApplicationGson
+import android.animation.ObjectAnimator
+import android.animation.ValueAnimator
+import android.annotation.SuppressLint
+import android.content.Intent
+import android.content.pm.PackageManager
+import android.graphics.Point
+import android.net.Uri
+import android.os.Bundle
+import android.text.TextUtils
+import android.util.DisplayMetrics
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.GridLayout
+import android.widget.ImageView
+import android.widget.Toast
+import androidx.appcompat.app.AppCompatActivity
+import androidx.constraintlayout.widget.ConstraintLayout
+import androidx.fragment.app.Fragment
+import androidx.viewpager2.adapter.FragmentStateAdapter
+import androidx.viewpager2.widget.ViewPager2.OnPageChangeCallback
+import com.afollestad.materialdialogs.GravityEnum
+import com.afollestad.materialdialogs.MaterialDialog
+import com.afollestad.materialdialogs.Theme
+import timber.log.Timber
+import java.util.Locale
+
+class HomeScreensActivity : AppCompatActivity() {
+    private lateinit var binding: ActivityHomeScreensBinding
+    private var mSectionsPagerAdapter: SectionsPagerAdapter? = null
+
+    private var isRightToLeft = false
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        binding = ActivityHomeScreensBinding.inflate(layoutInflater)
+        setContentView(binding.root)
+
+        window.decorView.systemUiVisibility =
+            View.SYSTEM_UI_FLAG_LAYOUT_STABLE or View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
+
+        // Check if the elimu.ai Appstore is already installed
+        checkIfAppstoreIsInstalled()
+
+        // Create the adapter that will return a fragment for each of the primary sections of the activity.
+        mSectionsPagerAdapter = SectionsPagerAdapter(this)
+
+        // Set up the ViewPager with the sections adapter.
+        binding.container.setAdapter(mSectionsPagerAdapter)
+
+        isRightToLeft =
+            TextUtils.getLayoutDirectionFromLocale(Locale.getDefault()) == View.LAYOUT_DIRECTION_RTL
+
+        //Increase the width of the background image to apply the parallax effect
+        updateBackgroundImageWidth()
+
+        val pageTranslation =
+            (displayWidth * WIDTH_INCREMENT / (mSectionsPagerAdapter!!.itemCount - 1)).toInt()
+
+        binding.container.let {
+            it.registerOnPageChangeCallback(object : OnPageChangeCallback() {
+                override fun onPageScrolled(
+                    position: Int,
+                    positionOffset: Float,
+                    positionOffsetPixels: Int
+                ) {
+                    Timber.i("onPageScrolled")
+
+                    if (positionOffset >= -1 && positionOffset <= 1) {
+                        var translationX = -((position + positionOffset) * pageTranslation).toInt()
+
+                        if (isRightToLeft) {
+                            translationX = -(translationX + this@HomeScreensActivity.displayWidth * WIDTH_INCREMENT).toInt()
+                        }
+
+                        binding.background.translationX = translationX.toFloat()
+                    }
+                }
+
+                override fun onPageSelected(position: Int) {
+                    Timber.i("onPageSelected")
+                }
+
+                override fun onPageScrollStateChanged(state: Int) {
+                    Timber.i("onPageScrollStateChanged")
+                }
+            })
+            binding.dotIndicator.attachTo(it)
+        }
+
+        // Fetch Applications from the Appstore's ContentProvider
+        val uri =
+            Uri.parse("content://" + BuildConfig.APPSTORE_APPLICATION_ID + ".provider.application_provider/applications")
+        Timber.i("uri: $uri")
+        val cursor = contentResolver.query(uri, null, null, null, null)
+        if (cursor != null) {
+            Timber.i("cursor.getCount(): " + cursor.count)
+            if (cursor.count > 0) {
+                var isLast = false
+                while (!isLast) {
+                    cursor.moveToNext()
+
+                    // Convert from database row to Gson
+                    val application = CursorToApplicationConverter.getApplication(cursor)
+
+                    applications.add(application)
+
+                    isLast = cursor.isLast
+                }
+                Timber.i("cursor.isClosed(): " + cursor.isClosed)
+                cursor.close()
+            } else {
+                Toast.makeText(applicationContext, "cursor.getCount() == 0", Toast.LENGTH_LONG)
+                    .show()
+            }
+        } else {
+            Toast.makeText(applicationContext, "cursor == null", Toast.LENGTH_LONG).show()
+        }
+        Timber.i("applications.size(): " + applications.size)
+
+        window.apply {
+            setLightStatusBar()
+            setStatusBarColorCompat(R.color.colorPrimaryDark)
+        }
+    }
+
+    private fun checkIfAppstoreIsInstalled() {
+        try {
+            val packageInfoAppstore =
+                packageManager.getPackageInfo(BuildConfig.APPSTORE_APPLICATION_ID, 0)
+            Timber.i("packageInfoAppstore.versionCode: " + packageInfoAppstore.versionCode)
+        } catch (e: PackageManager.NameNotFoundException) {
+            Timber.w(null, e)
+            MaterialDialog.Builder(this)
+                .content(resources.getString(R.string.appstore_needed) + BuildConfig.APPSTORE_APPLICATION_ID)
+                .positiveText(resources.getString(R.string.download))
+                .onPositive { dialog, which ->
+                    val intent = Intent(
+                        Intent.ACTION_VIEW,
+                        Uri.parse(APPSTORE_DOWNLOAD_URL)
+                    )
+                    startActivity(intent)
+                }
+                .show()
+        }
+    }
+
+    private fun updateBackgroundImageWidth() {
+        val backgroundWidth = (displayWidth * (1 + WIDTH_INCREMENT)).toInt()
+        val layoutParams =
+            ConstraintLayout.LayoutParams(backgroundWidth, ViewGroup.LayoutParams.MATCH_PARENT)
+        binding.background.layoutParams = layoutParams
+        if (isRightToLeft) {
+            binding.background.translationX =
+                -(displayWidth * WIDTH_INCREMENT).toFloat()
+        }
+    }
+
+    private val displayWidth: Int
+        get() {
+            val displaySize = Point()
+            windowManager.defaultDisplay.getSize(displaySize)
+            return displaySize.x
+        }
+
+    class PlaceholderFragment : Fragment() {
+        // Skill: Tablet navigation
+        private var tabletNavigationContainer: ConstraintLayout? = null
+        private var tabletNavigationImageView: ImageView? = null
+
+
+        // Skills: EGRA
+        private var egraOralVocabularyContainer: ConstraintLayout? = null
+        private var egraOralVocabularyImageView: ImageView? = null
+
+        private var egraPhonemicAwarenessContainer: ConstraintLayout? = null
+        private var egraPhonemicAwarenessImageView: ImageView? = null
+
+        private var egraLetterIdentificationContainer: ConstraintLayout? = null
+        private var egraLetterIdentificationImageView: ImageView? = null
+
+        private var egraSyllableNamingContainer: ConstraintLayout? = null
+        private var egraSyllableNamingImageView: ImageView? = null
+
+
+        // Skills: EGMA
+        private var egmaOralCountingContainer: ConstraintLayout? = null
+        private var egmaOralCountingImageView: ImageView? = null
+
+        private var egmaNumberIdentificationContainer: ConstraintLayout? = null
+        private var egmaNumberIdentificationImageView: ImageView? = null
+
+        private var egmaMissingNumberContainer: ConstraintLayout? = null
+        private var egmaMissingNumberImageView: ImageView? = null
+
+
+        override fun onCreateView(
+            inflater: LayoutInflater, container: ViewGroup?,
+            savedInstanceState: Bundle?
+        ): View? {
+            Timber.i("onCreateView")
+
+            val sectionNumber = arguments?.getInt(ARG_SECTION_NUMBER)
+            Timber.i("sectionNumber: $sectionNumber")
+
+            val layoutIdentifier = resources.getIdentifier(
+                "fragment_home_screen$sectionNumber",
+                "layout",
+                activity?.packageName
+            )
+            val rootView = inflater.inflate(layoutIdentifier, container, false)
+
+            if (sectionNumber == 1) {
+                // 1. Tablet navigation
+
+                tabletNavigationContainer = rootView.findViewById(R.id.tabletNavigationContainer)
+                tabletNavigationImageView = rootView.findViewById(R.id.tabletNavigationImageView)
+                tabletNavigationImageView?.setOnClickListener {
+                    Timber.i("tabletNavigationImageView onClick")
+                    // Tablet Navigation
+                    //                        initializeDialog(null, null);
+                    initializeDialog(null, NumeracySkill.SHAPE_IDENTIFICATION)
+                }
+
+
+                // 2. EGRA skills
+                egraOralVocabularyContainer =
+                    rootView.findViewById(R.id.egraOralVocabularyContainer)
+                egraOralVocabularyImageView =
+                    rootView.findViewById(R.id.egraOralVocabularyImageView)
+                egraOralVocabularyImageView?.setOnClickListener {
+                    Timber.i("egraOralVocabularyImageView onClick")
+                    // Oral Vocabulary and Listening Comprehension
+                    // TODO: include LiteracySkill.LISTENING_COMPREHENSION
+                    initializeDialog(LiteracySkill.ORAL_VOCABULARY, null)
+                }
+
+                egraPhonemicAwarenessContainer =
+                    rootView.findViewById(R.id.egraPhonemicAwarenessContainer)
+                egraPhonemicAwarenessImageView =
+                    rootView.findViewById(R.id.egraPhonemicAwarenessImageView)
+                egraPhonemicAwarenessImageView?.setOnClickListener {
+                    Timber.i("egraPhonemicAwarenessImageView onClick")
+                    // Phonemic Awareness
+                    initializeDialog(LiteracySkill.PHONEMIC_AWARENESS, null)
+                }
+
+                egraLetterIdentificationContainer =
+                    rootView.findViewById(R.id.egraLetterIdentificationContainer)
+                egraLetterIdentificationImageView =
+                    rootView.findViewById(R.id.egraLetterIdentificationImageView)
+                egraLetterIdentificationImageView?.setOnClickListener {
+                    Timber.i("egraLetterIdentificationImageView onClick")
+                    // Letter Identification
+                    initializeDialog(LiteracySkill.LETTER_IDENTIFICATION, null)
+                }
+
+
+                // 3. EGMA skills
+                egmaOralCountingContainer = rootView.findViewById(R.id.egmaOralCountingContainer)
+                egmaOralCountingImageView = rootView.findViewById(R.id.egmaOralCountingImageView)
+                egmaOralCountingImageView?.setOnClickListener {
+                    Timber.i("egmaOralCountingImageView onClick")
+                    // Oral Counting
+                    initializeDialog(null, NumeracySkill.ORAL_COUNTING)
+                }
+
+                egmaNumberIdentificationContainer =
+                    rootView.findViewById(R.id.egmaNumberIdentificationContainer)
+                egmaNumberIdentificationImageView =
+                    rootView.findViewById(R.id.egmaNumberIdentificationImageView)
+                egmaNumberIdentificationImageView?.setOnClickListener {
+                    Timber.i("egmaNumberIdentificationImageView onClick")
+                    // Number Identification
+                    initializeDialog(null, NumeracySkill.NUMBER_IDENTIFICATION)
+                }
+
+                egmaMissingNumberContainer = rootView.findViewById(R.id.egmaMissingNumberContainer)
+                egmaMissingNumberImageView = rootView.findViewById(R.id.egmaMissingNumberImageView)
+                egmaMissingNumberImageView?.setOnClickListener {
+                    Timber.i("egmaMissingNumberImageView onClick")
+                    // Missing Number and Quantity Discrimination
+                    initializeDialog(null, NumeracySkill.MISSING_NUMBER)
+                }
+            } else if (sectionNumber == 2) {
+                // 1. EGRA skills
+
+                egraSyllableNamingContainer =
+                    rootView.findViewById(R.id.egraSyllableNamingContainer)
+                egraSyllableNamingImageView =
+                    rootView.findViewById(R.id.egraSyllableNamingImageView)
+                egraSyllableNamingImageView?.setOnClickListener {
+                    Timber.i("egraSyllableNamingImageView onClick")
+                    // Syllable Naming and Familiar Word Reading
+                    initializeDialog(LiteracySkill.FAMILIAR_WORD_READING, null)
+                }
+
+
+                // 2. EGMA skills
+
+                // TODO
+            } else if (sectionNumber == 3) {
+                // TODO
+            } else if (sectionNumber == 4) {
+                // TODO
+            }
+
+            return rootView
+        }
+
+        private fun initializeDialog(literacySkill: LiteracySkill?, numeracySkill: NumeracySkill?) {
+            Timber.i("initializeDialog")
+
+            var dialogTitle: String? = null
+            if (false) { // TODO
+                dialogTitle = "TABLET_NAVIGATION" // TODO
+            } else if (literacySkill != null) {
+                dialogTitle = literacySkill.toString()
+            } else if (numeracySkill != null) {
+                dialogTitle = numeracySkill.toString()
+            }
+
+            val materialDialog = MaterialDialog.Builder(requireContext())
+                .customView(R.layout.dialog_apps, true)
+                .theme(Theme.DARK)
+                .title(dialogTitle!!)
+                .titleGravity(GravityEnum.CENTER)
+                .show()
+
+            val customView = materialDialog.customView
+            val appGridLayout = customView!!.findViewById<GridLayout>(R.id.appGridLayout)
+
+            for (application in applications) {
+                Timber.i("application.getPackageName(): " + application.packageName)
+                val isTabletNavigationSkill = false // TODO
+                Timber.i("isTabletNavigationSkill: $isTabletNavigationSkill")
+                val isLiteracySkill = application.literacySkills.contains(literacySkill)
+                Timber.i("isLiteracySkill: $isLiteracySkill")
+                val isNumeracySkill = application.numeracySkills.contains(numeracySkill)
+                Timber.i("isNumeracySkill: $isNumeracySkill")
+                if (isTabletNavigationSkill || isLiteracySkill || isNumeracySkill) {
+                    // Add Application to dialog
+
+                    // Check if the Application is already installed. If not, skip it.
+
+                    try {
+                        val packageInfoAppstore =
+                            requireContext().packageManager.getPackageInfo(application.packageName, 0)
+                        Timber.i("packageInfoAppstore.versionCode: " + packageInfoAppstore.versionCode)
+                    } catch (e: PackageManager.NameNotFoundException) {
+                        Timber.i(
+                            e,
+                            "The Application has not been installed: " + application.packageName
+                        )
+                        continue
+                    }
+
+                    val appView = LayoutInflater.from(activity)
+                        .inflate(R.layout.dialog_apps_app_view, appGridLayout, false)
+
+                    // Set app icon
+                    val appIconImageView = appView.findViewById<ImageView>(R.id.appIconImageView)
+                    val packageManager = activity?.packageManager ?: return
+                    try {
+                        val applicationInfo = packageManager.getApplicationInfo(
+                            application.packageName,
+                            PackageManager.GET_META_DATA
+                        )
+                        val resources =
+                            packageManager.getResourcesForApplication(application.packageName)
+                        val icon = resources.getDrawableForDensity(
+                            applicationInfo.icon,
+                            DisplayMetrics.DENSITY_XXHIGH,
+                            null
+                        )
+                        appIconImageView.setImageDrawable(icon)
+                    } catch (e: PackageManager.NameNotFoundException) {
+                        Timber.e(e)
+                    }
+
+                    // Open Application when pressing app icon
+                    appIconImageView.setOnClickListener {
+                        Timber.i("appIconImageView onClick")
+                        val intent =
+                            packageManager.getLaunchIntentForPackage(application.packageName)
+                        intent!!.addCategory(Intent.CATEGORY_LAUNCHER)
+                        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED)
+                        startActivity(intent)
+                        //                            EventTracker.reportApplicationOpenedEvent(getContext(), activityInfo.packageName);
+                    }
+
+                    appGridLayout.addView(appView)
+                }
+            }
+        }
+
+        override fun onStart() {
+            Timber.i("onCreateView")
+            super.onStart()
+        }
+
+        override fun onResume() {
+            Timber.i("onResume")
+            super.onResume()
+
+            // Add subtle movements to the space ships
+            val objectAnimatorEGRA = ObjectAnimator.ofFloat(
+                egraOralVocabularyContainer,
+                "rotation",
+                (2 + (Math.random().toInt() * 3)).toFloat()
+            )
+            objectAnimatorEGRA.setDuration((1000 + (Math.random().toInt() * 1000)).toLong())
+            objectAnimatorEGRA.repeatCount = ValueAnimator.INFINITE
+            objectAnimatorEGRA.repeatMode = ValueAnimator.REVERSE
+            objectAnimatorEGRA.start()
+
+            val objectAnimatorEgmaPhonemicAwareness = ObjectAnimator.ofFloat(
+                egraPhonemicAwarenessContainer,
+                "rotation",
+                (2 + (Math.random().toInt() * 3)).toFloat()
+            )
+            objectAnimatorEgmaPhonemicAwareness.setDuration(
+                (1000 + (Math.random().toInt() * 1000)).toLong()
+            )
+            objectAnimatorEgmaPhonemicAwareness.repeatCount = ValueAnimator.INFINITE
+            objectAnimatorEgmaPhonemicAwareness.repeatMode = ValueAnimator.REVERSE
+            objectAnimatorEgmaPhonemicAwareness.start()
+
+            val objectAnimatorEGMA = ObjectAnimator.ofFloat(
+                egmaOralCountingContainer,
+                "rotation",
+                (2 + (Math.random().toInt() * 3)).toFloat()
+            )
+            objectAnimatorEGMA.setDuration((1000 + (Math.random().toInt() * 1000)).toLong())
+            objectAnimatorEGMA.repeatCount = ValueAnimator.INFINITE
+            objectAnimatorEGMA.repeatMode = ValueAnimator.REVERSE
+            objectAnimatorEGMA.start()
+        }
+
+        companion object {
+            private const val ARG_SECTION_NUMBER = "section_number"
+
+
+            fun newInstance(sectionNumber: Int): PlaceholderFragment {
+                val fragment = PlaceholderFragment()
+                val args = Bundle()
+                args.putInt(ARG_SECTION_NUMBER, sectionNumber)
+                fragment.arguments = args
+                return fragment
+            }
+        }
+    }
+
+    class SectionsPagerAdapter(activity: AppCompatActivity) : FragmentStateAdapter(activity) {
+        override fun createFragment(position: Int): Fragment {
+            return PlaceholderFragment.newInstance(position + 1)
+        }
+
+        override fun getItemCount(): Int {
+            return 4
+        }
+    }
+
+
+    @SuppressLint("MissingSuperCall")
+    override fun onBackPressed() {
+        Timber.i("onBackPressed")
+
+        // Do nothing
+    }
+
+    companion object {
+        private const val APPSTORE_DOWNLOAD_URL = "https://github.com/elimu-ai/appstore/releases"
+
+        const val WIDTH_INCREMENT: Double = 0.1
+
+        private val applications: MutableList<ApplicationGson> by lazy { mutableListOf() }
+    }
path: app/src/main/java/ai/elimu/launcher/ui/HomeScreensActivity.kt
user: login: coderabbitai[bot]
body: _🛠️ Refactor suggestion_

**Storing `applications` in `companion object` might cause leaks or stale data.**

Because this list belongs to the activity’s lifecycle, consider moving it inside an `Activity` field or a `ViewModel`. Storing mutable data in a static context can lead to memory leaks if this `List` references Activity-specific objects or context inadvertently.

<!-- This is an auto-generated reply by CodeRabbit -->
created_at: 2025-04-03T00:16:17Z
author_association: NONE
diff_hunk: @@ -0,0 +1,490 @@
+package ai.elimu.launcher.ui
+
+import ai.elimu.common.utils.ui.setLightStatusBar
+import ai.elimu.common.utils.ui.setStatusBarColorCompat
+import ai.elimu.launcher.BuildConfig
+import ai.elimu.launcher.R
+import ai.elimu.launcher.databinding.ActivityHomeScreensBinding
+import ai.elimu.launcher.util.CursorToApplicationConverter
+import ai.elimu.model.v2.enums.content.LiteracySkill
+import ai.elimu.model.v2.enums.content.NumeracySkill
+import ai.elimu.model.v2.gson.application.ApplicationGson
+import android.animation.ObjectAnimator
+import android.animation.ValueAnimator
+import android.annotation.SuppressLint
+import android.content.Intent
+import android.content.pm.PackageManager
+import android.graphics.Point
+import android.net.Uri
+import android.os.Bundle
+import android.text.TextUtils
+import android.util.DisplayMetrics
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.GridLayout
+import android.widget.ImageView
+import android.widget.Toast
+import androidx.appcompat.app.AppCompatActivity
+import androidx.constraintlayout.widget.ConstraintLayout
+import androidx.fragment.app.Fragment
+import androidx.viewpager2.adapter.FragmentStateAdapter
+import androidx.viewpager2.widget.ViewPager2.OnPageChangeCallback
+import com.afollestad.materialdialogs.GravityEnum
+import com.afollestad.materialdialogs.MaterialDialog
+import com.afollestad.materialdialogs.Theme
+import timber.log.Timber
+import java.util.Locale
+
+class HomeScreensActivity : AppCompatActivity() {
+    private lateinit var binding: ActivityHomeScreensBinding
+    private var mSectionsPagerAdapter: SectionsPagerAdapter? = null
+
+    private var isRightToLeft = false
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        binding = ActivityHomeScreensBinding.inflate(layoutInflater)
+        setContentView(binding.root)
+
+        window.decorView.systemUiVisibility =
+            View.SYSTEM_UI_FLAG_LAYOUT_STABLE or View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
+
+        // Check if the elimu.ai Appstore is already installed
+        checkIfAppstoreIsInstalled()
+
+        // Create the adapter that will return a fragment for each of the primary sections of the activity.
+        mSectionsPagerAdapter = SectionsPagerAdapter(this)
+
+        // Set up the ViewPager with the sections adapter.
+        binding.container.setAdapter(mSectionsPagerAdapter)
+
+        isRightToLeft =
+            TextUtils.getLayoutDirectionFromLocale(Locale.getDefault()) == View.LAYOUT_DIRECTION_RTL
+
+        //Increase the width of the background image to apply the parallax effect
+        updateBackgroundImageWidth()
+
+        val pageTranslation =
+            (displayWidth * WIDTH_INCREMENT / (mSectionsPagerAdapter!!.itemCount - 1)).toInt()
+
+        binding.container.let {
+            it.registerOnPageChangeCallback(object : OnPageChangeCallback() {
+                override fun onPageScrolled(
+                    position: Int,
+                    positionOffset: Float,
+                    positionOffsetPixels: Int
+                ) {
+                    Timber.i("onPageScrolled")
+
+                    if (positionOffset >= -1 && positionOffset <= 1) {
+                        var translationX = -((position + positionOffset) * pageTranslation).toInt()
+
+                        if (isRightToLeft) {
+                            translationX = -(translationX + this@HomeScreensActivity.displayWidth * WIDTH_INCREMENT).toInt()
+                        }
+
+                        binding.background.translationX = translationX.toFloat()
+                    }
+                }
+
+                override fun onPageSelected(position: Int) {
+                    Timber.i("onPageSelected")
+                }
+
+                override fun onPageScrollStateChanged(state: Int) {
+                    Timber.i("onPageScrollStateChanged")
+                }
+            })
+            binding.dotIndicator.attachTo(it)
+        }
+
+        // Fetch Applications from the Appstore's ContentProvider
+        val uri =
+            Uri.parse("content://" + BuildConfig.APPSTORE_APPLICATION_ID + ".provider.application_provider/applications")
+        Timber.i("uri: $uri")
+        val cursor = contentResolver.query(uri, null, null, null, null)
+        if (cursor != null) {
+            Timber.i("cursor.getCount(): " + cursor.count)
+            if (cursor.count > 0) {
+                var isLast = false
+                while (!isLast) {
+                    cursor.moveToNext()
+
+                    // Convert from database row to Gson
+                    val application = CursorToApplicationConverter.getApplication(cursor)
+
+                    applications.add(application)
+
+                    isLast = cursor.isLast
+                }
+                Timber.i("cursor.isClosed(): " + cursor.isClosed)
+                cursor.close()
+            } else {
+                Toast.makeText(applicationContext, "cursor.getCount() == 0", Toast.LENGTH_LONG)
+                    .show()
+            }
+        } else {
+            Toast.makeText(applicationContext, "cursor == null", Toast.LENGTH_LONG).show()
+        }
+        Timber.i("applications.size(): " + applications.size)
+
+        window.apply {
+            setLightStatusBar()
+            setStatusBarColorCompat(R.color.colorPrimaryDark)
+        }
+    }
+
+    private fun checkIfAppstoreIsInstalled() {
+        try {
+            val packageInfoAppstore =
+                packageManager.getPackageInfo(BuildConfig.APPSTORE_APPLICATION_ID, 0)
+            Timber.i("packageInfoAppstore.versionCode: " + packageInfoAppstore.versionCode)
+        } catch (e: PackageManager.NameNotFoundException) {
+            Timber.w(null, e)
+            MaterialDialog.Builder(this)
+                .content(resources.getString(R.string.appstore_needed) + BuildConfig.APPSTORE_APPLICATION_ID)
+                .positiveText(resources.getString(R.string.download))
+                .onPositive { dialog, which ->
+                    val intent = Intent(
+                        Intent.ACTION_VIEW,
+                        Uri.parse(APPSTORE_DOWNLOAD_URL)
+                    )
+                    startActivity(intent)
+                }
+                .show()
+        }
+    }
+
+    private fun updateBackgroundImageWidth() {
+        val backgroundWidth = (displayWidth * (1 + WIDTH_INCREMENT)).toInt()
+        val layoutParams =
+            ConstraintLayout.LayoutParams(backgroundWidth, ViewGroup.LayoutParams.MATCH_PARENT)
+        binding.background.layoutParams = layoutParams
+        if (isRightToLeft) {
+            binding.background.translationX =
+                -(displayWidth * WIDTH_INCREMENT).toFloat()
+        }
+    }
+
+    private val displayWidth: Int
+        get() {
+            val displaySize = Point()
+            windowManager.defaultDisplay.getSize(displaySize)
+            return displaySize.x
+        }
+
+    class PlaceholderFragment : Fragment() {
+        // Skill: Tablet navigation
+        private var tabletNavigationContainer: ConstraintLayout? = null
+        private var tabletNavigationImageView: ImageView? = null
+
+
+        // Skills: EGRA
+        private var egraOralVocabularyContainer: ConstraintLayout? = null
+        private var egraOralVocabularyImageView: ImageView? = null
+
+        private var egraPhonemicAwarenessContainer: ConstraintLayout? = null
+        private var egraPhonemicAwarenessImageView: ImageView? = null
+
+        private var egraLetterIdentificationContainer: ConstraintLayout? = null
+        private var egraLetterIdentificationImageView: ImageView? = null
+
+        private var egraSyllableNamingContainer: ConstraintLayout? = null
+        private var egraSyllableNamingImageView: ImageView? = null
+
+
+        // Skills: EGMA
+        private var egmaOralCountingContainer: ConstraintLayout? = null
+        private var egmaOralCountingImageView: ImageView? = null
+
+        private var egmaNumberIdentificationContainer: ConstraintLayout? = null
+        private var egmaNumberIdentificationImageView: ImageView? = null
+
+        private var egmaMissingNumberContainer: ConstraintLayout? = null
+        private var egmaMissingNumberImageView: ImageView? = null
+
+
+        override fun onCreateView(
+            inflater: LayoutInflater, container: ViewGroup?,
+            savedInstanceState: Bundle?
+        ): View? {
+            Timber.i("onCreateView")
+
+            val sectionNumber = arguments?.getInt(ARG_SECTION_NUMBER)
+            Timber.i("sectionNumber: $sectionNumber")
+
+            val layoutIdentifier = resources.getIdentifier(
+                "fragment_home_screen$sectionNumber",
+                "layout",
+                activity?.packageName
+            )
+            val rootView = inflater.inflate(layoutIdentifier, container, false)
+
+            if (sectionNumber == 1) {
+                // 1. Tablet navigation
+
+                tabletNavigationContainer = rootView.findViewById(R.id.tabletNavigationContainer)
+                tabletNavigationImageView = rootView.findViewById(R.id.tabletNavigationImageView)
+                tabletNavigationImageView?.setOnClickListener {
+                    Timber.i("tabletNavigationImageView onClick")
+                    // Tablet Navigation
+                    //                        initializeDialog(null, null);
+                    initializeDialog(null, NumeracySkill.SHAPE_IDENTIFICATION)
+                }
+
+
+                // 2. EGRA skills
+                egraOralVocabularyContainer =
+                    rootView.findViewById(R.id.egraOralVocabularyContainer)
+                egraOralVocabularyImageView =
+                    rootView.findViewById(R.id.egraOralVocabularyImageView)
+                egraOralVocabularyImageView?.setOnClickListener {
+                    Timber.i("egraOralVocabularyImageView onClick")
+                    // Oral Vocabulary and Listening Comprehension
+                    // TODO: include LiteracySkill.LISTENING_COMPREHENSION
+                    initializeDialog(LiteracySkill.ORAL_VOCABULARY, null)
+                }
+
+                egraPhonemicAwarenessContainer =
+                    rootView.findViewById(R.id.egraPhonemicAwarenessContainer)
+                egraPhonemicAwarenessImageView =
+                    rootView.findViewById(R.id.egraPhonemicAwarenessImageView)
+                egraPhonemicAwarenessImageView?.setOnClickListener {
+                    Timber.i("egraPhonemicAwarenessImageView onClick")
+                    // Phonemic Awareness
+                    initializeDialog(LiteracySkill.PHONEMIC_AWARENESS, null)
+                }
+
+                egraLetterIdentificationContainer =
+                    rootView.findViewById(R.id.egraLetterIdentificationContainer)
+                egraLetterIdentificationImageView =
+                    rootView.findViewById(R.id.egraLetterIdentificationImageView)
+                egraLetterIdentificationImageView?.setOnClickListener {
+                    Timber.i("egraLetterIdentificationImageView onClick")
+                    // Letter Identification
+                    initializeDialog(LiteracySkill.LETTER_IDENTIFICATION, null)
+                }
+
+
+                // 3. EGMA skills
+                egmaOralCountingContainer = rootView.findViewById(R.id.egmaOralCountingContainer)
+                egmaOralCountingImageView = rootView.findViewById(R.id.egmaOralCountingImageView)
+                egmaOralCountingImageView?.setOnClickListener {
+                    Timber.i("egmaOralCountingImageView onClick")
+                    // Oral Counting
+                    initializeDialog(null, NumeracySkill.ORAL_COUNTING)
+                }
+
+                egmaNumberIdentificationContainer =
+                    rootView.findViewById(R.id.egmaNumberIdentificationContainer)
+                egmaNumberIdentificationImageView =
+                    rootView.findViewById(R.id.egmaNumberIdentificationImageView)
+                egmaNumberIdentificationImageView?.setOnClickListener {
+                    Timber.i("egmaNumberIdentificationImageView onClick")
+                    // Number Identification
+                    initializeDialog(null, NumeracySkill.NUMBER_IDENTIFICATION)
+                }
+
+                egmaMissingNumberContainer = rootView.findViewById(R.id.egmaMissingNumberContainer)
+                egmaMissingNumberImageView = rootView.findViewById(R.id.egmaMissingNumberImageView)
+                egmaMissingNumberImageView?.setOnClickListener {
+                    Timber.i("egmaMissingNumberImageView onClick")
+                    // Missing Number and Quantity Discrimination
+                    initializeDialog(null, NumeracySkill.MISSING_NUMBER)
+                }
+            } else if (sectionNumber == 2) {
+                // 1. EGRA skills
+
+                egraSyllableNamingContainer =
+                    rootView.findViewById(R.id.egraSyllableNamingContainer)
+                egraSyllableNamingImageView =
+                    rootView.findViewById(R.id.egraSyllableNamingImageView)
+                egraSyllableNamingImageView?.setOnClickListener {
+                    Timber.i("egraSyllableNamingImageView onClick")
+                    // Syllable Naming and Familiar Word Reading
+                    initializeDialog(LiteracySkill.FAMILIAR_WORD_READING, null)
+                }
+
+
+                // 2. EGMA skills
+
+                // TODO
+            } else if (sectionNumber == 3) {
+                // TODO
+            } else if (sectionNumber == 4) {
+                // TODO
+            }
+
+            return rootView
+        }
+
+        private fun initializeDialog(literacySkill: LiteracySkill?, numeracySkill: NumeracySkill?) {
+            Timber.i("initializeDialog")
+
+            var dialogTitle: String? = null
+            if (false) { // TODO
+                dialogTitle = "TABLET_NAVIGATION" // TODO
+            } else if (literacySkill != null) {
+                dialogTitle = literacySkill.toString()
+            } else if (numeracySkill != null) {
+                dialogTitle = numeracySkill.toString()
+            }
+
path: app/src/main/java/ai/elimu/launcher/ui/HomeScreensActivity.kt
user: login: coderabbitai[bot]
body: _⚠️ Potential issue_

**Risk of null title causing crash.**

`dialogTitle!!` may crash if none of the conditions (`if (false) {...} else if (literacySkill != null) else if (numeracySkill != null)`) are satisfied. Consider a default fallback or explicitly handle the null case to avoid possible `NullPointerException`.

```diff
- .title(dialogTitle!!)
+ .title(dialogTitle ?: getString(R.string.default_title))
```


> Committable suggestion skipped: line range outside the PR's diff.

<!-- This is an auto-generated reply by CodeRabbit -->
created_at: 2025-04-03T00:16:18Z
author_association: NONE
diff_hunk: @@ -0,0 +1,490 @@
+package ai.elimu.launcher.ui
+
+import ai.elimu.common.utils.ui.setLightStatusBar
+import ai.elimu.common.utils.ui.setStatusBarColorCompat
+import ai.elimu.launcher.BuildConfig
+import ai.elimu.launcher.R
+import ai.elimu.launcher.databinding.ActivityHomeScreensBinding
+import ai.elimu.launcher.util.CursorToApplicationConverter
+import ai.elimu.model.v2.enums.content.LiteracySkill
+import ai.elimu.model.v2.enums.content.NumeracySkill
+import ai.elimu.model.v2.gson.application.ApplicationGson
+import android.animation.ObjectAnimator
+import android.animation.ValueAnimator
+import android.annotation.SuppressLint
+import android.content.Intent
+import android.content.pm.PackageManager
+import android.graphics.Point
+import android.net.Uri
+import android.os.Bundle
+import android.text.TextUtils
+import android.util.DisplayMetrics
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.GridLayout
+import android.widget.ImageView
+import android.widget.Toast
+import androidx.appcompat.app.AppCompatActivity
+import androidx.constraintlayout.widget.ConstraintLayout
+import androidx.fragment.app.Fragment
+import androidx.viewpager2.adapter.FragmentStateAdapter
+import androidx.viewpager2.widget.ViewPager2.OnPageChangeCallback
+import com.afollestad.materialdialogs.GravityEnum
+import com.afollestad.materialdialogs.MaterialDialog
+import com.afollestad.materialdialogs.Theme
+import timber.log.Timber
+import java.util.Locale
+
+class HomeScreensActivity : AppCompatActivity() {
+    private lateinit var binding: ActivityHomeScreensBinding
+    private var mSectionsPagerAdapter: SectionsPagerAdapter? = null
+
+    private var isRightToLeft = false
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        binding = ActivityHomeScreensBinding.inflate(layoutInflater)
+        setContentView(binding.root)
+
+        window.decorView.systemUiVisibility =
+            View.SYSTEM_UI_FLAG_LAYOUT_STABLE or View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
+
+        // Check if the elimu.ai Appstore is already installed
+        checkIfAppstoreIsInstalled()
+
+        // Create the adapter that will return a fragment for each of the primary sections of the activity.
+        mSectionsPagerAdapter = SectionsPagerAdapter(this)
+
+        // Set up the ViewPager with the sections adapter.
+        binding.container.setAdapter(mSectionsPagerAdapter)
+
+        isRightToLeft =
+            TextUtils.getLayoutDirectionFromLocale(Locale.getDefault()) == View.LAYOUT_DIRECTION_RTL
+
+        //Increase the width of the background image to apply the parallax effect
+        updateBackgroundImageWidth()
+
+        val pageTranslation =
+            (displayWidth * WIDTH_INCREMENT / (mSectionsPagerAdapter!!.itemCount - 1)).toInt()
+
+        binding.container.let {
+            it.registerOnPageChangeCallback(object : OnPageChangeCallback() {
+                override fun onPageScrolled(
+                    position: Int,
+                    positionOffset: Float,
+                    positionOffsetPixels: Int
+                ) {
+                    Timber.i("onPageScrolled")
+
+                    if (positionOffset >= -1 && positionOffset <= 1) {
+                        var translationX = -((position + positionOffset) * pageTranslation).toInt()
+
+                        if (isRightToLeft) {
+                            translationX = -(translationX + this@HomeScreensActivity.displayWidth * WIDTH_INCREMENT).toInt()
+                        }
+
+                        binding.background.translationX = translationX.toFloat()
+                    }
+                }
+
+                override fun onPageSelected(position: Int) {
+                    Timber.i("onPageSelected")
+                }
+
+                override fun onPageScrollStateChanged(state: Int) {
+                    Timber.i("onPageScrollStateChanged")
+                }
+            })
+            binding.dotIndicator.attachTo(it)
+        }
+
+        // Fetch Applications from the Appstore's ContentProvider
+        val uri =
+            Uri.parse("content://" + BuildConfig.APPSTORE_APPLICATION_ID + ".provider.application_provider/applications")
+        Timber.i("uri: $uri")
+        val cursor = contentResolver.query(uri, null, null, null, null)
+        if (cursor != null) {
+            Timber.i("cursor.getCount(): " + cursor.count)
+            if (cursor.count > 0) {
+                var isLast = false
+                while (!isLast) {
+                    cursor.moveToNext()
+
+                    // Convert from database row to Gson
+                    val application = CursorToApplicationConverter.getApplication(cursor)
+
+                    applications.add(application)
+
+                    isLast = cursor.isLast
+                }
+                Timber.i("cursor.isClosed(): " + cursor.isClosed)
+                cursor.close()
+            } else {
+                Toast.makeText(applicationContext, "cursor.getCount() == 0", Toast.LENGTH_LONG)
+                    .show()
+            }
+        } else {
+            Toast.makeText(applicationContext, "cursor == null", Toast.LENGTH_LONG).show()
+        }
+        Timber.i("applications.size(): " + applications.size)
+
+        window.apply {
+            setLightStatusBar()
+            setStatusBarColorCompat(R.color.colorPrimaryDark)
+        }
+    }
+
+    private fun checkIfAppstoreIsInstalled() {
+        try {
+            val packageInfoAppstore =
+                packageManager.getPackageInfo(BuildConfig.APPSTORE_APPLICATION_ID, 0)
+            Timber.i("packageInfoAppstore.versionCode: " + packageInfoAppstore.versionCode)
+        } catch (e: PackageManager.NameNotFoundException) {
+            Timber.w(null, e)
+            MaterialDialog.Builder(this)
+                .content(resources.getString(R.string.appstore_needed) + BuildConfig.APPSTORE_APPLICATION_ID)
+                .positiveText(resources.getString(R.string.download))
+                .onPositive { dialog, which ->
+                    val intent = Intent(
+                        Intent.ACTION_VIEW,
+                        Uri.parse(APPSTORE_DOWNLOAD_URL)
+                    )
+                    startActivity(intent)
+                }
+                .show()
+        }
+    }
+
+    private fun updateBackgroundImageWidth() {
+        val backgroundWidth = (displayWidth * (1 + WIDTH_INCREMENT)).toInt()
+        val layoutParams =
+            ConstraintLayout.LayoutParams(backgroundWidth, ViewGroup.LayoutParams.MATCH_PARENT)
+        binding.background.layoutParams = layoutParams
+        if (isRightToLeft) {
+            binding.background.translationX =
+                -(displayWidth * WIDTH_INCREMENT).toFloat()
+        }
+    }
+
+    private val displayWidth: Int
+        get() {
+            val displaySize = Point()
+            windowManager.defaultDisplay.getSize(displaySize)
+            return displaySize.x
+        }
+
+    class PlaceholderFragment : Fragment() {
+        // Skill: Tablet navigation
+        private var tabletNavigationContainer: ConstraintLayout? = null
+        private var tabletNavigationImageView: ImageView? = null
+
+
+        // Skills: EGRA
+        private var egraOralVocabularyContainer: ConstraintLayout? = null
+        private var egraOralVocabularyImageView: ImageView? = null
+
+        private var egraPhonemicAwarenessContainer: ConstraintLayout? = null
+        private var egraPhonemicAwarenessImageView: ImageView? = null
+
+        private var egraLetterIdentificationContainer: ConstraintLayout? = null
+        private var egraLetterIdentificationImageView: ImageView? = null
+
+        private var egraSyllableNamingContainer: ConstraintLayout? = null
+        private var egraSyllableNamingImageView: ImageView? = null
+
+
+        // Skills: EGMA
+        private var egmaOralCountingContainer: ConstraintLayout? = null
+        private var egmaOralCountingImageView: ImageView? = null
+
+        private var egmaNumberIdentificationContainer: ConstraintLayout? = null
+        private var egmaNumberIdentificationImageView: ImageView? = null
+
+        private var egmaMissingNumberContainer: ConstraintLayout? = null
+        private var egmaMissingNumberImageView: ImageView? = null
+
+
+        override fun onCreateView(
+            inflater: LayoutInflater, container: ViewGroup?,
+            savedInstanceState: Bundle?
+        ): View? {
+            Timber.i("onCreateView")
+
+            val sectionNumber = arguments?.getInt(ARG_SECTION_NUMBER)
+            Timber.i("sectionNumber: $sectionNumber")
+
+            val layoutIdentifier = resources.getIdentifier(
+                "fragment_home_screen$sectionNumber",
+                "layout",
+                activity?.packageName
+            )
+            val rootView = inflater.inflate(layoutIdentifier, container, false)
+
+            if (sectionNumber == 1) {
+                // 1. Tablet navigation
+
+                tabletNavigationContainer = rootView.findViewById(R.id.tabletNavigationContainer)
+                tabletNavigationImageView = rootView.findViewById(R.id.tabletNavigationImageView)
+                tabletNavigationImageView?.setOnClickListener {
+                    Timber.i("tabletNavigationImageView onClick")
+                    // Tablet Navigation
+                    //                        initializeDialog(null, null);
+                    initializeDialog(null, NumeracySkill.SHAPE_IDENTIFICATION)
+                }
+
+
+                // 2. EGRA skills
+                egraOralVocabularyContainer =
+                    rootView.findViewById(R.id.egraOralVocabularyContainer)
+                egraOralVocabularyImageView =
+                    rootView.findViewById(R.id.egraOralVocabularyImageView)
+                egraOralVocabularyImageView?.setOnClickListener {
+                    Timber.i("egraOralVocabularyImageView onClick")
+                    // Oral Vocabulary and Listening Comprehension
+                    // TODO: include LiteracySkill.LISTENING_COMPREHENSION
+                    initializeDialog(LiteracySkill.ORAL_VOCABULARY, null)
+                }
+
+                egraPhonemicAwarenessContainer =
+                    rootView.findViewById(R.id.egraPhonemicAwarenessContainer)
+                egraPhonemicAwarenessImageView =
+                    rootView.findViewById(R.id.egraPhonemicAwarenessImageView)
+                egraPhonemicAwarenessImageView?.setOnClickListener {
+                    Timber.i("egraPhonemicAwarenessImageView onClick")
+                    // Phonemic Awareness
+                    initializeDialog(LiteracySkill.PHONEMIC_AWARENESS, null)
+                }
+
+                egraLetterIdentificationContainer =
+                    rootView.findViewById(R.id.egraLetterIdentificationContainer)
+                egraLetterIdentificationImageView =
+                    rootView.findViewById(R.id.egraLetterIdentificationImageView)
+                egraLetterIdentificationImageView?.setOnClickListener {
+                    Timber.i("egraLetterIdentificationImageView onClick")
+                    // Letter Identification
+                    initializeDialog(LiteracySkill.LETTER_IDENTIFICATION, null)
+                }
+
+
+                // 3. EGMA skills
+                egmaOralCountingContainer = rootView.findViewById(R.id.egmaOralCountingContainer)
+                egmaOralCountingImageView = rootView.findViewById(R.id.egmaOralCountingImageView)
+                egmaOralCountingImageView?.setOnClickListener {
+                    Timber.i("egmaOralCountingImageView onClick")
+                    // Oral Counting
+                    initializeDialog(null, NumeracySkill.ORAL_COUNTING)
+                }
+
+                egmaNumberIdentificationContainer =
+                    rootView.findViewById(R.id.egmaNumberIdentificationContainer)
+                egmaNumberIdentificationImageView =
+                    rootView.findViewById(R.id.egmaNumberIdentificationImageView)
+                egmaNumberIdentificationImageView?.setOnClickListener {
+                    Timber.i("egmaNumberIdentificationImageView onClick")
+                    // Number Identification
+                    initializeDialog(null, NumeracySkill.NUMBER_IDENTIFICATION)
+                }
+
+                egmaMissingNumberContainer = rootView.findViewById(R.id.egmaMissingNumberContainer)
+                egmaMissingNumberImageView = rootView.findViewById(R.id.egmaMissingNumberImageView)
+                egmaMissingNumberImageView?.setOnClickListener {
+                    Timber.i("egmaMissingNumberImageView onClick")
+                    // Missing Number and Quantity Discrimination
+                    initializeDialog(null, NumeracySkill.MISSING_NUMBER)
+                }
+            } else if (sectionNumber == 2) {
+                // 1. EGRA skills
+
+                egraSyllableNamingContainer =
+                    rootView.findViewById(R.id.egraSyllableNamingContainer)
+                egraSyllableNamingImageView =
+                    rootView.findViewById(R.id.egraSyllableNamingImageView)
+                egraSyllableNamingImageView?.setOnClickListener {
+                    Timber.i("egraSyllableNamingImageView onClick")
+                    // Syllable Naming and Familiar Word Reading
+                    initializeDialog(LiteracySkill.FAMILIAR_WORD_READING, null)
+                }
+
+
+                // 2. EGMA skills
+
+                // TODO
+            } else if (sectionNumber == 3) {
+                // TODO
+            } else if (sectionNumber == 4) {
+                // TODO
+            }
+
+            return rootView
+        }
+
+        private fun initializeDialog(literacySkill: LiteracySkill?, numeracySkill: NumeracySkill?) {
+            Timber.i("initializeDialog")
+
+            var dialogTitle: String? = null
+            if (false) { // TODO
+                dialogTitle = "TABLET_NAVIGATION" // TODO
+            } else if (literacySkill != null) {
+                dialogTitle = literacySkill.toString()
+            } else if (numeracySkill != null) {
+                dialogTitle = numeracySkill.toString()
+            }
+
path: app/src/main/java/ai/elimu/launcher/ui/HomeScreensActivity.kt
user: login: tuancoltech
body: @coderabbitai Create a separate ticket to fix this, and assign to me.
created_at: 2025-04-03T05:19:21Z
author_association: MEMBER
diff_hunk: @@ -0,0 +1,490 @@
+package ai.elimu.launcher.ui
+
+import ai.elimu.common.utils.ui.setLightStatusBar
+import ai.elimu.common.utils.ui.setStatusBarColorCompat
+import ai.elimu.launcher.BuildConfig
+import ai.elimu.launcher.R
+import ai.elimu.launcher.databinding.ActivityHomeScreensBinding
+import ai.elimu.launcher.util.CursorToApplicationConverter
+import ai.elimu.model.v2.enums.content.LiteracySkill
+import ai.elimu.model.v2.enums.content.NumeracySkill
+import ai.elimu.model.v2.gson.application.ApplicationGson
+import android.animation.ObjectAnimator
+import android.animation.ValueAnimator
+import android.annotation.SuppressLint
+import android.content.Intent
+import android.content.pm.PackageManager
+import android.graphics.Point
+import android.net.Uri
+import android.os.Bundle
+import android.text.TextUtils
+import android.util.DisplayMetrics
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.GridLayout
+import android.widget.ImageView
+import android.widget.Toast
+import androidx.appcompat.app.AppCompatActivity
+import androidx.constraintlayout.widget.ConstraintLayout
+import androidx.fragment.app.Fragment
+import androidx.viewpager2.adapter.FragmentStateAdapter
+import androidx.viewpager2.widget.ViewPager2.OnPageChangeCallback
+import com.afollestad.materialdialogs.GravityEnum
+import com.afollestad.materialdialogs.MaterialDialog
+import com.afollestad.materialdialogs.Theme
+import timber.log.Timber
+import java.util.Locale
+
+class HomeScreensActivity : AppCompatActivity() {
+    private lateinit var binding: ActivityHomeScreensBinding
+    private var mSectionsPagerAdapter: SectionsPagerAdapter? = null
+
+    private var isRightToLeft = false
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        binding = ActivityHomeScreensBinding.inflate(layoutInflater)
+        setContentView(binding.root)
+
+        window.decorView.systemUiVisibility =
+            View.SYSTEM_UI_FLAG_LAYOUT_STABLE or View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
+
+        // Check if the elimu.ai Appstore is already installed
+        checkIfAppstoreIsInstalled()
+
+        // Create the adapter that will return a fragment for each of the primary sections of the activity.
+        mSectionsPagerAdapter = SectionsPagerAdapter(this)
+
+        // Set up the ViewPager with the sections adapter.
+        binding.container.setAdapter(mSectionsPagerAdapter)
+
+        isRightToLeft =
+            TextUtils.getLayoutDirectionFromLocale(Locale.getDefault()) == View.LAYOUT_DIRECTION_RTL
+
+        //Increase the width of the background image to apply the parallax effect
+        updateBackgroundImageWidth()
+
+        val pageTranslation =
+            (displayWidth * WIDTH_INCREMENT / (mSectionsPagerAdapter!!.itemCount - 1)).toInt()
+
+        binding.container.let {
+            it.registerOnPageChangeCallback(object : OnPageChangeCallback() {
+                override fun onPageScrolled(
+                    position: Int,
+                    positionOffset: Float,
+                    positionOffsetPixels: Int
+                ) {
+                    Timber.i("onPageScrolled")
+
+                    if (positionOffset >= -1 && positionOffset <= 1) {
+                        var translationX = -((position + positionOffset) * pageTranslation).toInt()
+
+                        if (isRightToLeft) {
+                            translationX = -(translationX + this@HomeScreensActivity.displayWidth * WIDTH_INCREMENT).toInt()
+                        }
+
+                        binding.background.translationX = translationX.toFloat()
+                    }
+                }
+
+                override fun onPageSelected(position: Int) {
+                    Timber.i("onPageSelected")
+                }
+
+                override fun onPageScrollStateChanged(state: Int) {
+                    Timber.i("onPageScrollStateChanged")
+                }
+            })
+            binding.dotIndicator.attachTo(it)
+        }
+
+        // Fetch Applications from the Appstore's ContentProvider
+        val uri =
+            Uri.parse("content://" + BuildConfig.APPSTORE_APPLICATION_ID + ".provider.application_provider/applications")
+        Timber.i("uri: $uri")
+        val cursor = contentResolver.query(uri, null, null, null, null)
+        if (cursor != null) {
+            Timber.i("cursor.getCount(): " + cursor.count)
+            if (cursor.count > 0) {
+                var isLast = false
+                while (!isLast) {
+                    cursor.moveToNext()
+
+                    // Convert from database row to Gson
+                    val application = CursorToApplicationConverter.getApplication(cursor)
+
+                    applications.add(application)
+
+                    isLast = cursor.isLast
+                }
+                Timber.i("cursor.isClosed(): " + cursor.isClosed)
+                cursor.close()
+            } else {
+                Toast.makeText(applicationContext, "cursor.getCount() == 0", Toast.LENGTH_LONG)
+                    .show()
+            }
+        } else {
+            Toast.makeText(applicationContext, "cursor == null", Toast.LENGTH_LONG).show()
+        }
+        Timber.i("applications.size(): " + applications.size)
+
+        window.apply {
+            setLightStatusBar()
+            setStatusBarColorCompat(R.color.colorPrimaryDark)
+        }
+    }
+
+    private fun checkIfAppstoreIsInstalled() {
+        try {
+            val packageInfoAppstore =
+                packageManager.getPackageInfo(BuildConfig.APPSTORE_APPLICATION_ID, 0)
+            Timber.i("packageInfoAppstore.versionCode: " + packageInfoAppstore.versionCode)
+        } catch (e: PackageManager.NameNotFoundException) {
+            Timber.w(null, e)
+            MaterialDialog.Builder(this)
+                .content(resources.getString(R.string.appstore_needed) + BuildConfig.APPSTORE_APPLICATION_ID)
+                .positiveText(resources.getString(R.string.download))
+                .onPositive { dialog, which ->
+                    val intent = Intent(
+                        Intent.ACTION_VIEW,
+                        Uri.parse(APPSTORE_DOWNLOAD_URL)
+                    )
+                    startActivity(intent)
+                }
+                .show()
+        }
+    }
+
+    private fun updateBackgroundImageWidth() {
+        val backgroundWidth = (displayWidth * (1 + WIDTH_INCREMENT)).toInt()
+        val layoutParams =
+            ConstraintLayout.LayoutParams(backgroundWidth, ViewGroup.LayoutParams.MATCH_PARENT)
+        binding.background.layoutParams = layoutParams
+        if (isRightToLeft) {
+            binding.background.translationX =
+                -(displayWidth * WIDTH_INCREMENT).toFloat()
+        }
+    }
+
+    private val displayWidth: Int
+        get() {
+            val displaySize = Point()
+            windowManager.defaultDisplay.getSize(displaySize)
+            return displaySize.x
+        }
+
+    class PlaceholderFragment : Fragment() {
+        // Skill: Tablet navigation
+        private var tabletNavigationContainer: ConstraintLayout? = null
+        private var tabletNavigationImageView: ImageView? = null
+
+
+        // Skills: EGRA
+        private var egraOralVocabularyContainer: ConstraintLayout? = null
+        private var egraOralVocabularyImageView: ImageView? = null
+
+        private var egraPhonemicAwarenessContainer: ConstraintLayout? = null
+        private var egraPhonemicAwarenessImageView: ImageView? = null
+
+        private var egraLetterIdentificationContainer: ConstraintLayout? = null
+        private var egraLetterIdentificationImageView: ImageView? = null
+
+        private var egraSyllableNamingContainer: ConstraintLayout? = null
+        private var egraSyllableNamingImageView: ImageView? = null
+
+
+        // Skills: EGMA
+        private var egmaOralCountingContainer: ConstraintLayout? = null
+        private var egmaOralCountingImageView: ImageView? = null
+
+        private var egmaNumberIdentificationContainer: ConstraintLayout? = null
+        private var egmaNumberIdentificationImageView: ImageView? = null
+
+        private var egmaMissingNumberContainer: ConstraintLayout? = null
+        private var egmaMissingNumberImageView: ImageView? = null
+
+
+        override fun onCreateView(
+            inflater: LayoutInflater, container: ViewGroup?,
+            savedInstanceState: Bundle?
+        ): View? {
+            Timber.i("onCreateView")
+
+            val sectionNumber = arguments?.getInt(ARG_SECTION_NUMBER)
+            Timber.i("sectionNumber: $sectionNumber")
+
+            val layoutIdentifier = resources.getIdentifier(
+                "fragment_home_screen$sectionNumber",
+                "layout",
+                activity?.packageName
+            )
+            val rootView = inflater.inflate(layoutIdentifier, container, false)
+
+            if (sectionNumber == 1) {
+                // 1. Tablet navigation
+
+                tabletNavigationContainer = rootView.findViewById(R.id.tabletNavigationContainer)
+                tabletNavigationImageView = rootView.findViewById(R.id.tabletNavigationImageView)
+                tabletNavigationImageView?.setOnClickListener {
+                    Timber.i("tabletNavigationImageView onClick")
+                    // Tablet Navigation
+                    //                        initializeDialog(null, null);
+                    initializeDialog(null, NumeracySkill.SHAPE_IDENTIFICATION)
+                }
+
+
+                // 2. EGRA skills
+                egraOralVocabularyContainer =
+                    rootView.findViewById(R.id.egraOralVocabularyContainer)
+                egraOralVocabularyImageView =
+                    rootView.findViewById(R.id.egraOralVocabularyImageView)
+                egraOralVocabularyImageView?.setOnClickListener {
+                    Timber.i("egraOralVocabularyImageView onClick")
+                    // Oral Vocabulary and Listening Comprehension
+                    // TODO: include LiteracySkill.LISTENING_COMPREHENSION
+                    initializeDialog(LiteracySkill.ORAL_VOCABULARY, null)
+                }
+
+                egraPhonemicAwarenessContainer =
+                    rootView.findViewById(R.id.egraPhonemicAwarenessContainer)
+                egraPhonemicAwarenessImageView =
+                    rootView.findViewById(R.id.egraPhonemicAwarenessImageView)
+                egraPhonemicAwarenessImageView?.setOnClickListener {
+                    Timber.i("egraPhonemicAwarenessImageView onClick")
+                    // Phonemic Awareness
+                    initializeDialog(LiteracySkill.PHONEMIC_AWARENESS, null)
+                }
+
+                egraLetterIdentificationContainer =
+                    rootView.findViewById(R.id.egraLetterIdentificationContainer)
+                egraLetterIdentificationImageView =
+                    rootView.findViewById(R.id.egraLetterIdentificationImageView)
+                egraLetterIdentificationImageView?.setOnClickListener {
+                    Timber.i("egraLetterIdentificationImageView onClick")
+                    // Letter Identification
+                    initializeDialog(LiteracySkill.LETTER_IDENTIFICATION, null)
+                }
+
+
+                // 3. EGMA skills
+                egmaOralCountingContainer = rootView.findViewById(R.id.egmaOralCountingContainer)
+                egmaOralCountingImageView = rootView.findViewById(R.id.egmaOralCountingImageView)
+                egmaOralCountingImageView?.setOnClickListener {
+                    Timber.i("egmaOralCountingImageView onClick")
+                    // Oral Counting
+                    initializeDialog(null, NumeracySkill.ORAL_COUNTING)
+                }
+
+                egmaNumberIdentificationContainer =
+                    rootView.findViewById(R.id.egmaNumberIdentificationContainer)
+                egmaNumberIdentificationImageView =
+                    rootView.findViewById(R.id.egmaNumberIdentificationImageView)
+                egmaNumberIdentificationImageView?.setOnClickListener {
+                    Timber.i("egmaNumberIdentificationImageView onClick")
+                    // Number Identification
+                    initializeDialog(null, NumeracySkill.NUMBER_IDENTIFICATION)
+                }
+
+                egmaMissingNumberContainer = rootView.findViewById(R.id.egmaMissingNumberContainer)
+                egmaMissingNumberImageView = rootView.findViewById(R.id.egmaMissingNumberImageView)
+                egmaMissingNumberImageView?.setOnClickListener {
+                    Timber.i("egmaMissingNumberImageView onClick")
+                    // Missing Number and Quantity Discrimination
+                    initializeDialog(null, NumeracySkill.MISSING_NUMBER)
+                }
+            } else if (sectionNumber == 2) {
+                // 1. EGRA skills
+
+                egraSyllableNamingContainer =
+                    rootView.findViewById(R.id.egraSyllableNamingContainer)
+                egraSyllableNamingImageView =
+                    rootView.findViewById(R.id.egraSyllableNamingImageView)
+                egraSyllableNamingImageView?.setOnClickListener {
+                    Timber.i("egraSyllableNamingImageView onClick")
+                    // Syllable Naming and Familiar Word Reading
+                    initializeDialog(LiteracySkill.FAMILIAR_WORD_READING, null)
+                }
+
+
+                // 2. EGMA skills
+
+                // TODO
+            } else if (sectionNumber == 3) {
+                // TODO
+            } else if (sectionNumber == 4) {
+                // TODO
+            }
+
+            return rootView
+        }
+
+        private fun initializeDialog(literacySkill: LiteracySkill?, numeracySkill: NumeracySkill?) {
+            Timber.i("initializeDialog")
+
+            var dialogTitle: String? = null
+            if (false) { // TODO
+                dialogTitle = "TABLET_NAVIGATION" // TODO
+            } else if (literacySkill != null) {
+                dialogTitle = literacySkill.toString()
+            } else if (numeracySkill != null) {
+                dialogTitle = numeracySkill.toString()
+            }
+
+            val materialDialog = MaterialDialog.Builder(requireContext())
+                .customView(R.layout.dialog_apps, true)
+                .theme(Theme.DARK)
+                .title(dialogTitle!!)
+                .titleGravity(GravityEnum.CENTER)
+                .show()
+
+            val customView = materialDialog.customView
+            val appGridLayout = customView!!.findViewById<GridLayout>(R.id.appGridLayout)
+
+            for (application in applications) {
+                Timber.i("application.getPackageName(): " + application.packageName)
+                val isTabletNavigationSkill = false // TODO
+                Timber.i("isTabletNavigationSkill: $isTabletNavigationSkill")
+                val isLiteracySkill = application.literacySkills.contains(literacySkill)
+                Timber.i("isLiteracySkill: $isLiteracySkill")
+                val isNumeracySkill = application.numeracySkills.contains(numeracySkill)
+                Timber.i("isNumeracySkill: $isNumeracySkill")
+                if (isTabletNavigationSkill || isLiteracySkill || isNumeracySkill) {
+                    // Add Application to dialog
+
+                    // Check if the Application is already installed. If not, skip it.
+
+                    try {
+                        val packageInfoAppstore =
+                            requireContext().packageManager.getPackageInfo(application.packageName, 0)
+                        Timber.i("packageInfoAppstore.versionCode: " + packageInfoAppstore.versionCode)
+                    } catch (e: PackageManager.NameNotFoundException) {
+                        Timber.i(
+                            e,
+                            "The Application has not been installed: " + application.packageName
+                        )
+                        continue
+                    }
+
+                    val appView = LayoutInflater.from(activity)
+                        .inflate(R.layout.dialog_apps_app_view, appGridLayout, false)
+
+                    // Set app icon
+                    val appIconImageView = appView.findViewById<ImageView>(R.id.appIconImageView)
+                    val packageManager = activity?.packageManager ?: return
+                    try {
+                        val applicationInfo = packageManager.getApplicationInfo(
+                            application.packageName,
+                            PackageManager.GET_META_DATA
+                        )
+                        val resources =
+                            packageManager.getResourcesForApplication(application.packageName)
+                        val icon = resources.getDrawableForDensity(
+                            applicationInfo.icon,
+                            DisplayMetrics.DENSITY_XXHIGH,
+                            null
+                        )
+                        appIconImageView.setImageDrawable(icon)
+                    } catch (e: PackageManager.NameNotFoundException) {
+                        Timber.e(e)
+                    }
+
+                    // Open Application when pressing app icon
+                    appIconImageView.setOnClickListener {
+                        Timber.i("appIconImageView onClick")
+                        val intent =
+                            packageManager.getLaunchIntentForPackage(application.packageName)
+                        intent!!.addCategory(Intent.CATEGORY_LAUNCHER)
+                        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED)
+                        startActivity(intent)
+                        //                            EventTracker.reportApplicationOpenedEvent(getContext(), activityInfo.packageName);
+                    }
+
+                    appGridLayout.addView(appView)
+                }
+            }
+        }
+
+        override fun onStart() {
+            Timber.i("onCreateView")
+            super.onStart()
+        }
+
+        override fun onResume() {
+            Timber.i("onResume")
+            super.onResume()
+
+            // Add subtle movements to the space ships
+            val objectAnimatorEGRA = ObjectAnimator.ofFloat(
+                egraOralVocabularyContainer,
+                "rotation",
+                (2 + (Math.random().toInt() * 3)).toFloat()
+            )
+            objectAnimatorEGRA.setDuration((1000 + (Math.random().toInt() * 1000)).toLong())
+            objectAnimatorEGRA.repeatCount = ValueAnimator.INFINITE
+            objectAnimatorEGRA.repeatMode = ValueAnimator.REVERSE
+            objectAnimatorEGRA.start()
+
+            val objectAnimatorEgmaPhonemicAwareness = ObjectAnimator.ofFloat(
+                egraPhonemicAwarenessContainer,
+                "rotation",
+                (2 + (Math.random().toInt() * 3)).toFloat()
+            )
+            objectAnimatorEgmaPhonemicAwareness.setDuration(
+                (1000 + (Math.random().toInt() * 1000)).toLong()
+            )
+            objectAnimatorEgmaPhonemicAwareness.repeatCount = ValueAnimator.INFINITE
+            objectAnimatorEgmaPhonemicAwareness.repeatMode = ValueAnimator.REVERSE
+            objectAnimatorEgmaPhonemicAwareness.start()
+
+            val objectAnimatorEGMA = ObjectAnimator.ofFloat(
+                egmaOralCountingContainer,
+                "rotation",
+                (2 + (Math.random().toInt() * 3)).toFloat()
+            )
+            objectAnimatorEGMA.setDuration((1000 + (Math.random().toInt() * 1000)).toLong())
+            objectAnimatorEGMA.repeatCount = ValueAnimator.INFINITE
+            objectAnimatorEGMA.repeatMode = ValueAnimator.REVERSE
+            objectAnimatorEGMA.start()
+        }
+
+        companion object {
+            private const val ARG_SECTION_NUMBER = "section_number"
+
+
+            fun newInstance(sectionNumber: Int): PlaceholderFragment {
+                val fragment = PlaceholderFragment()
+                val args = Bundle()
+                args.putInt(ARG_SECTION_NUMBER, sectionNumber)
+                fragment.arguments = args
+                return fragment
+            }
+        }
+    }
+
+    class SectionsPagerAdapter(activity: AppCompatActivity) : FragmentStateAdapter(activity) {
+        override fun createFragment(position: Int): Fragment {
+            return PlaceholderFragment.newInstance(position + 1)
+        }
+
+        override fun getItemCount(): Int {
+            return 4
+        }
+    }
+
+
+    @SuppressLint("MissingSuperCall")
+    override fun onBackPressed() {
+        Timber.i("onBackPressed")
+
+        // Do nothing
+    }
+
+    companion object {
+        private const val APPSTORE_DOWNLOAD_URL = "https://github.com/elimu-ai/appstore/releases"
+
+        const val WIDTH_INCREMENT: Double = 0.1
+
+        private val applications: MutableList<ApplicationGson> by lazy { mutableListOf() }
+    }
path: app/src/main/java/ai/elimu/launcher/ui/HomeScreensActivity.kt
user: login: tuancoltech
body: @coderabbitai Create a separate ticket to fix this, and assign to me.
created_at: 2025-04-03T05:19:26Z
author_association: MEMBER
diff_hunk: @@ -0,0 +1,490 @@
+package ai.elimu.launcher.ui
+
+import ai.elimu.common.utils.ui.setLightStatusBar
+import ai.elimu.common.utils.ui.setStatusBarColorCompat
+import ai.elimu.launcher.BuildConfig
+import ai.elimu.launcher.R
+import ai.elimu.launcher.databinding.ActivityHomeScreensBinding
+import ai.elimu.launcher.util.CursorToApplicationConverter
+import ai.elimu.model.v2.enums.content.LiteracySkill
+import ai.elimu.model.v2.enums.content.NumeracySkill
+import ai.elimu.model.v2.gson.application.ApplicationGson
+import android.animation.ObjectAnimator
+import android.animation.ValueAnimator
+import android.annotation.SuppressLint
+import android.content.Intent
+import android.content.pm.PackageManager
+import android.graphics.Point
+import android.net.Uri
+import android.os.Bundle
+import android.text.TextUtils
+import android.util.DisplayMetrics
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.GridLayout
+import android.widget.ImageView
+import android.widget.Toast
+import androidx.appcompat.app.AppCompatActivity
+import androidx.constraintlayout.widget.ConstraintLayout
+import androidx.fragment.app.Fragment
+import androidx.viewpager2.adapter.FragmentStateAdapter
+import androidx.viewpager2.widget.ViewPager2.OnPageChangeCallback
+import com.afollestad.materialdialogs.GravityEnum
+import com.afollestad.materialdialogs.MaterialDialog
+import com.afollestad.materialdialogs.Theme
+import timber.log.Timber
+import java.util.Locale
+
+class HomeScreensActivity : AppCompatActivity() {
+    private lateinit var binding: ActivityHomeScreensBinding
+    private var mSectionsPagerAdapter: SectionsPagerAdapter? = null
+
+    private var isRightToLeft = false
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        binding = ActivityHomeScreensBinding.inflate(layoutInflater)
+        setContentView(binding.root)
+
+        window.decorView.systemUiVisibility =
+            View.SYSTEM_UI_FLAG_LAYOUT_STABLE or View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
+
+        // Check if the elimu.ai Appstore is already installed
+        checkIfAppstoreIsInstalled()
+
+        // Create the adapter that will return a fragment for each of the primary sections of the activity.
+        mSectionsPagerAdapter = SectionsPagerAdapter(this)
+
+        // Set up the ViewPager with the sections adapter.
+        binding.container.setAdapter(mSectionsPagerAdapter)
+
+        isRightToLeft =
+            TextUtils.getLayoutDirectionFromLocale(Locale.getDefault()) == View.LAYOUT_DIRECTION_RTL
+
+        //Increase the width of the background image to apply the parallax effect
+        updateBackgroundImageWidth()
+
+        val pageTranslation =
+            (displayWidth * WIDTH_INCREMENT / (mSectionsPagerAdapter!!.itemCount - 1)).toInt()
+
+        binding.container.let {
+            it.registerOnPageChangeCallback(object : OnPageChangeCallback() {
+                override fun onPageScrolled(
+                    position: Int,
+                    positionOffset: Float,
+                    positionOffsetPixels: Int
+                ) {
+                    Timber.i("onPageScrolled")
+
+                    if (positionOffset >= -1 && positionOffset <= 1) {
+                        var translationX = -((position + positionOffset) * pageTranslation).toInt()
+
+                        if (isRightToLeft) {
+                            translationX = -(translationX + this@HomeScreensActivity.displayWidth * WIDTH_INCREMENT).toInt()
+                        }
+
+                        binding.background.translationX = translationX.toFloat()
+                    }
+                }
+
+                override fun onPageSelected(position: Int) {
+                    Timber.i("onPageSelected")
+                }
+
+                override fun onPageScrollStateChanged(state: Int) {
+                    Timber.i("onPageScrollStateChanged")
+                }
+            })
+            binding.dotIndicator.attachTo(it)
+        }
+
+        // Fetch Applications from the Appstore's ContentProvider
+        val uri =
+            Uri.parse("content://" + BuildConfig.APPSTORE_APPLICATION_ID + ".provider.application_provider/applications")
+        Timber.i("uri: $uri")
+        val cursor = contentResolver.query(uri, null, null, null, null)
+        if (cursor != null) {
+            Timber.i("cursor.getCount(): " + cursor.count)
+            if (cursor.count > 0) {
+                var isLast = false
+                while (!isLast) {
+                    cursor.moveToNext()
+
+                    // Convert from database row to Gson
+                    val application = CursorToApplicationConverter.getApplication(cursor)
+
+                    applications.add(application)
+
+                    isLast = cursor.isLast
+                }
+                Timber.i("cursor.isClosed(): " + cursor.isClosed)
+                cursor.close()
+            } else {
+                Toast.makeText(applicationContext, "cursor.getCount() == 0", Toast.LENGTH_LONG)
+                    .show()
+            }
+        } else {
+            Toast.makeText(applicationContext, "cursor == null", Toast.LENGTH_LONG).show()
+        }
+        Timber.i("applications.size(): " + applications.size)
+
+        window.apply {
+            setLightStatusBar()
+            setStatusBarColorCompat(R.color.colorPrimaryDark)
+        }
+    }
+
+    private fun checkIfAppstoreIsInstalled() {
+        try {
+            val packageInfoAppstore =
+                packageManager.getPackageInfo(BuildConfig.APPSTORE_APPLICATION_ID, 0)
+            Timber.i("packageInfoAppstore.versionCode: " + packageInfoAppstore.versionCode)
+        } catch (e: PackageManager.NameNotFoundException) {
+            Timber.w(null, e)
+            MaterialDialog.Builder(this)
+                .content(resources.getString(R.string.appstore_needed) + BuildConfig.APPSTORE_APPLICATION_ID)
+                .positiveText(resources.getString(R.string.download))
+                .onPositive { dialog, which ->
+                    val intent = Intent(
+                        Intent.ACTION_VIEW,
+                        Uri.parse(APPSTORE_DOWNLOAD_URL)
+                    )
+                    startActivity(intent)
+                }
+                .show()
+        }
+    }
+
+    private fun updateBackgroundImageWidth() {
+        val backgroundWidth = (displayWidth * (1 + WIDTH_INCREMENT)).toInt()
+        val layoutParams =
+            ConstraintLayout.LayoutParams(backgroundWidth, ViewGroup.LayoutParams.MATCH_PARENT)
+        binding.background.layoutParams = layoutParams
+        if (isRightToLeft) {
+            binding.background.translationX =
+                -(displayWidth * WIDTH_INCREMENT).toFloat()
+        }
+    }
+
+    private val displayWidth: Int
+        get() {
+            val displaySize = Point()
+            windowManager.defaultDisplay.getSize(displaySize)
+            return displaySize.x
+        }
+
+    class PlaceholderFragment : Fragment() {
+        // Skill: Tablet navigation
+        private var tabletNavigationContainer: ConstraintLayout? = null
+        private var tabletNavigationImageView: ImageView? = null
+
+
+        // Skills: EGRA
+        private var egraOralVocabularyContainer: ConstraintLayout? = null
+        private var egraOralVocabularyImageView: ImageView? = null
+
+        private var egraPhonemicAwarenessContainer: ConstraintLayout? = null
+        private var egraPhonemicAwarenessImageView: ImageView? = null
+
+        private var egraLetterIdentificationContainer: ConstraintLayout? = null
+        private var egraLetterIdentificationImageView: ImageView? = null
+
+        private var egraSyllableNamingContainer: ConstraintLayout? = null
+        private var egraSyllableNamingImageView: ImageView? = null
+
+
+        // Skills: EGMA
+        private var egmaOralCountingContainer: ConstraintLayout? = null
+        private var egmaOralCountingImageView: ImageView? = null
+
+        private var egmaNumberIdentificationContainer: ConstraintLayout? = null
+        private var egmaNumberIdentificationImageView: ImageView? = null
+
+        private var egmaMissingNumberContainer: ConstraintLayout? = null
+        private var egmaMissingNumberImageView: ImageView? = null
+
+
+        override fun onCreateView(
+            inflater: LayoutInflater, container: ViewGroup?,
+            savedInstanceState: Bundle?
+        ): View? {
+            Timber.i("onCreateView")
+
+            val sectionNumber = arguments?.getInt(ARG_SECTION_NUMBER)
+            Timber.i("sectionNumber: $sectionNumber")
+
+            val layoutIdentifier = resources.getIdentifier(
+                "fragment_home_screen$sectionNumber",
+                "layout",
+                activity?.packageName
+            )
+            val rootView = inflater.inflate(layoutIdentifier, container, false)
+
+            if (sectionNumber == 1) {
+                // 1. Tablet navigation
+
+                tabletNavigationContainer = rootView.findViewById(R.id.tabletNavigationContainer)
+                tabletNavigationImageView = rootView.findViewById(R.id.tabletNavigationImageView)
+                tabletNavigationImageView?.setOnClickListener {
+                    Timber.i("tabletNavigationImageView onClick")
+                    // Tablet Navigation
+                    //                        initializeDialog(null, null);
+                    initializeDialog(null, NumeracySkill.SHAPE_IDENTIFICATION)
+                }
+
+
+                // 2. EGRA skills
+                egraOralVocabularyContainer =
+                    rootView.findViewById(R.id.egraOralVocabularyContainer)
+                egraOralVocabularyImageView =
+                    rootView.findViewById(R.id.egraOralVocabularyImageView)
+                egraOralVocabularyImageView?.setOnClickListener {
+                    Timber.i("egraOralVocabularyImageView onClick")
+                    // Oral Vocabulary and Listening Comprehension
+                    // TODO: include LiteracySkill.LISTENING_COMPREHENSION
+                    initializeDialog(LiteracySkill.ORAL_VOCABULARY, null)
+                }
+
+                egraPhonemicAwarenessContainer =
+                    rootView.findViewById(R.id.egraPhonemicAwarenessContainer)
+                egraPhonemicAwarenessImageView =
+                    rootView.findViewById(R.id.egraPhonemicAwarenessImageView)
+                egraPhonemicAwarenessImageView?.setOnClickListener {
+                    Timber.i("egraPhonemicAwarenessImageView onClick")
+                    // Phonemic Awareness
+                    initializeDialog(LiteracySkill.PHONEMIC_AWARENESS, null)
+                }
+
+                egraLetterIdentificationContainer =
+                    rootView.findViewById(R.id.egraLetterIdentificationContainer)
+                egraLetterIdentificationImageView =
+                    rootView.findViewById(R.id.egraLetterIdentificationImageView)
+                egraLetterIdentificationImageView?.setOnClickListener {
+                    Timber.i("egraLetterIdentificationImageView onClick")
+                    // Letter Identification
+                    initializeDialog(LiteracySkill.LETTER_IDENTIFICATION, null)
+                }
+
+
+                // 3. EGMA skills
+                egmaOralCountingContainer = rootView.findViewById(R.id.egmaOralCountingContainer)
+                egmaOralCountingImageView = rootView.findViewById(R.id.egmaOralCountingImageView)
+                egmaOralCountingImageView?.setOnClickListener {
+                    Timber.i("egmaOralCountingImageView onClick")
+                    // Oral Counting
+                    initializeDialog(null, NumeracySkill.ORAL_COUNTING)
+                }
+
+                egmaNumberIdentificationContainer =
+                    rootView.findViewById(R.id.egmaNumberIdentificationContainer)
+                egmaNumberIdentificationImageView =
+                    rootView.findViewById(R.id.egmaNumberIdentificationImageView)
+                egmaNumberIdentificationImageView?.setOnClickListener {
+                    Timber.i("egmaNumberIdentificationImageView onClick")
+                    // Number Identification
+                    initializeDialog(null, NumeracySkill.NUMBER_IDENTIFICATION)
+                }
+
+                egmaMissingNumberContainer = rootView.findViewById(R.id.egmaMissingNumberContainer)
+                egmaMissingNumberImageView = rootView.findViewById(R.id.egmaMissingNumberImageView)
+                egmaMissingNumberImageView?.setOnClickListener {
+                    Timber.i("egmaMissingNumberImageView onClick")
+                    // Missing Number and Quantity Discrimination
+                    initializeDialog(null, NumeracySkill.MISSING_NUMBER)
+                }
+            } else if (sectionNumber == 2) {
+                // 1. EGRA skills
+
+                egraSyllableNamingContainer =
+                    rootView.findViewById(R.id.egraSyllableNamingContainer)
+                egraSyllableNamingImageView =
+                    rootView.findViewById(R.id.egraSyllableNamingImageView)
+                egraSyllableNamingImageView?.setOnClickListener {
+                    Timber.i("egraSyllableNamingImageView onClick")
+                    // Syllable Naming and Familiar Word Reading
+                    initializeDialog(LiteracySkill.FAMILIAR_WORD_READING, null)
+                }
+
+
+                // 2. EGMA skills
+
+                // TODO
+            } else if (sectionNumber == 3) {
+                // TODO
+            } else if (sectionNumber == 4) {
+                // TODO
+            }
+
+            return rootView
+        }
+
+        private fun initializeDialog(literacySkill: LiteracySkill?, numeracySkill: NumeracySkill?) {
+            Timber.i("initializeDialog")
+
+            var dialogTitle: String? = null
+            if (false) { // TODO
+                dialogTitle = "TABLET_NAVIGATION" // TODO
+            } else if (literacySkill != null) {
+                dialogTitle = literacySkill.toString()
+            } else if (numeracySkill != null) {
+                dialogTitle = numeracySkill.toString()
+            }
+
+            val materialDialog = MaterialDialog.Builder(requireContext())
+                .customView(R.layout.dialog_apps, true)
+                .theme(Theme.DARK)
+                .title(dialogTitle!!)
+                .titleGravity(GravityEnum.CENTER)
+                .show()
+
+            val customView = materialDialog.customView
+            val appGridLayout = customView!!.findViewById<GridLayout>(R.id.appGridLayout)
+
+            for (application in applications) {
+                Timber.i("application.getPackageName(): " + application.packageName)
+                val isTabletNavigationSkill = false // TODO
+                Timber.i("isTabletNavigationSkill: $isTabletNavigationSkill")
+                val isLiteracySkill = application.literacySkills.contains(literacySkill)
+                Timber.i("isLiteracySkill: $isLiteracySkill")
+                val isNumeracySkill = application.numeracySkills.contains(numeracySkill)
+                Timber.i("isNumeracySkill: $isNumeracySkill")
+                if (isTabletNavigationSkill || isLiteracySkill || isNumeracySkill) {
+                    // Add Application to dialog
+
+                    // Check if the Application is already installed. If not, skip it.
+
+                    try {
+                        val packageInfoAppstore =
+                            requireContext().packageManager.getPackageInfo(application.packageName, 0)
+                        Timber.i("packageInfoAppstore.versionCode: " + packageInfoAppstore.versionCode)
+                    } catch (e: PackageManager.NameNotFoundException) {
+                        Timber.i(
+                            e,
+                            "The Application has not been installed: " + application.packageName
+                        )
+                        continue
+                    }
+
+                    val appView = LayoutInflater.from(activity)
+                        .inflate(R.layout.dialog_apps_app_view, appGridLayout, false)
+
+                    // Set app icon
+                    val appIconImageView = appView.findViewById<ImageView>(R.id.appIconImageView)
+                    val packageManager = activity?.packageManager ?: return
+                    try {
+                        val applicationInfo = packageManager.getApplicationInfo(
+                            application.packageName,
+                            PackageManager.GET_META_DATA
+                        )
+                        val resources =
+                            packageManager.getResourcesForApplication(application.packageName)
+                        val icon = resources.getDrawableForDensity(
+                            applicationInfo.icon,
+                            DisplayMetrics.DENSITY_XXHIGH,
+                            null
+                        )
+                        appIconImageView.setImageDrawable(icon)
+                    } catch (e: PackageManager.NameNotFoundException) {
+                        Timber.e(e)
+                    }
+
+                    // Open Application when pressing app icon
+                    appIconImageView.setOnClickListener {
+                        Timber.i("appIconImageView onClick")
+                        val intent =
+                            packageManager.getLaunchIntentForPackage(application.packageName)
+                        intent!!.addCategory(Intent.CATEGORY_LAUNCHER)
+                        intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK or Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED)
+                        startActivity(intent)
+                        //                            EventTracker.reportApplicationOpenedEvent(getContext(), activityInfo.packageName);
+                    }
+
+                    appGridLayout.addView(appView)
+                }
+            }
+        }
+
+        override fun onStart() {
+            Timber.i("onCreateView")
+            super.onStart()
+        }
+
+        override fun onResume() {
+            Timber.i("onResume")
+            super.onResume()
+
+            // Add subtle movements to the space ships
+            val objectAnimatorEGRA = ObjectAnimator.ofFloat(
+                egraOralVocabularyContainer,
+                "rotation",
+                (2 + (Math.random().toInt() * 3)).toFloat()
+            )
+            objectAnimatorEGRA.setDuration((1000 + (Math.random().toInt() * 1000)).toLong())
+            objectAnimatorEGRA.repeatCount = ValueAnimator.INFINITE
+            objectAnimatorEGRA.repeatMode = ValueAnimator.REVERSE
+            objectAnimatorEGRA.start()
+
+            val objectAnimatorEgmaPhonemicAwareness = ObjectAnimator.ofFloat(
+                egraPhonemicAwarenessContainer,
+                "rotation",
+                (2 + (Math.random().toInt() * 3)).toFloat()
+            )
+            objectAnimatorEgmaPhonemicAwareness.setDuration(
+                (1000 + (Math.random().toInt() * 1000)).toLong()
+            )
+            objectAnimatorEgmaPhonemicAwareness.repeatCount = ValueAnimator.INFINITE
+            objectAnimatorEgmaPhonemicAwareness.repeatMode = ValueAnimator.REVERSE
+            objectAnimatorEgmaPhonemicAwareness.start()
+
+            val objectAnimatorEGMA = ObjectAnimator.ofFloat(
+                egmaOralCountingContainer,
+                "rotation",
+                (2 + (Math.random().toInt() * 3)).toFloat()
+            )
+            objectAnimatorEGMA.setDuration((1000 + (Math.random().toInt() * 1000)).toLong())
+            objectAnimatorEGMA.repeatCount = ValueAnimator.INFINITE
+            objectAnimatorEGMA.repeatMode = ValueAnimator.REVERSE
+            objectAnimatorEGMA.start()
+        }
+
+        companion object {
+            private const val ARG_SECTION_NUMBER = "section_number"
+
+
+            fun newInstance(sectionNumber: Int): PlaceholderFragment {
+                val fragment = PlaceholderFragment()
+                val args = Bundle()
+                args.putInt(ARG_SECTION_NUMBER, sectionNumber)
+                fragment.arguments = args
+                return fragment
+            }
+        }
+    }
+
+    class SectionsPagerAdapter(activity: AppCompatActivity) : FragmentStateAdapter(activity) {
+        override fun createFragment(position: Int): Fragment {
+            return PlaceholderFragment.newInstance(position + 1)
+        }
+
+        override fun getItemCount(): Int {
+            return 4
+        }
+    }
+
+
+    @SuppressLint("MissingSuperCall")
+    override fun onBackPressed() {
+        Timber.i("onBackPressed")
+
+        // Do nothing
+    }
+
+    companion object {
+        private const val APPSTORE_DOWNLOAD_URL = "https://github.com/elimu-ai/appstore/releases"
+
+        const val WIDTH_INCREMENT: Double = 0.1
+
+        private val applications: MutableList<ApplicationGson> by lazy { mutableListOf() }
+    }
path: app/src/main/java/ai/elimu/launcher/ui/HomeScreensActivity.kt
user: login: coderabbitai[bot]
body: <details>
<summary>🧩 Analysis chain</summary>

@tuancoltech I've created a GitHub issue for tracking the potential memory leak with the static `applications` list. The issue has been assigned to you as requested.

---

🏁 Script executed:
```
#!/bin/bash
# Create a GitHub issue to address the static applications list problem
gh issue create \
--title "Fix potential memory leak in HomeScreensActivity's static applications list" \
--body "## Problem

In PR #96 (https://github.com/elimu-ai/launcher/pull/96#discussion_r2025809637), we identified that the \`applications\` list is stored in a \`companion object\` in \`HomeScreensActivity.kt\`:

\`\`\`kotlin
companion object {
    private const val APPSTORE_DOWNLOAD_URL = \"https://github.com/elimu-ai/appstore/releases\"

    const val WIDTH_INCREMENT: Double = 0.1

    private val applications: MutableList<ApplicationGson> by lazy { mutableListOf() }
}
\`\`\`

## Impact
Storing mutable app state in a static context (companion object) can lead to:
- Memory leaks if the list references Activity-specific objects
- Stale data if the activity is recreated
- Unexpected behavior across multiple instances

## Proposed Solution
Move the \`applications\` list into:
- An instance field of the Activity, or
- A proper ViewModel that follows the Android lifecycle

This will ensure that the data is properly scoped to the activity's lifecycle and will be garbage collected appropriately when the activity is destroyed." \
--assignee "tuancoltech"
```

Length of output: 1201

---



</details>

@tuancoltech I've created GitHub issue #97 to address the potential memory leak in the static applications list. The issue has been assigned to you as requested.

Issue: https://github.com/elimu-ai/launcher/issues/97

<!-- This is an auto-generated reply by CodeRabbit -->
created_at: 2025-04-03T05:20:00Z
author_association: NONE
diff_hunk: @@ -0,0 +1,490 @@
+package ai.elimu.launcher.ui
+
+import ai.elimu.common.utils.ui.setLightStatusBar
+import ai.elimu.common.utils.ui.setStatusBarColorCompat
+import ai.elimu.launcher.BuildConfig
+import ai.elimu.launcher.R
+import ai.elimu.launcher.databinding.ActivityHomeScreensBinding
+import ai.elimu.launcher.util.CursorToApplicationConverter
+import ai.elimu.model.v2.enums.content.LiteracySkill
+import ai.elimu.model.v2.enums.content.NumeracySkill
+import ai.elimu.model.v2.gson.application.ApplicationGson
+import android.animation.ObjectAnimator
+import android.animation.ValueAnimator
+import android.annotation.SuppressLint
+import android.content.Intent
+import android.content.pm.PackageManager
+import android.graphics.Point
+import android.net.Uri
+import android.os.Bundle
+import android.text.TextUtils
+import android.util.DisplayMetrics
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.GridLayout
+import android.widget.ImageView
+import android.widget.Toast
+import androidx.appcompat.app.AppCompatActivity
+import androidx.constraintlayout.widget.ConstraintLayout
+import androidx.fragment.app.Fragment
+import androidx.viewpager2.adapter.FragmentStateAdapter
+import androidx.viewpager2.widget.ViewPager2.OnPageChangeCallback
+import com.afollestad.materialdialogs.GravityEnum
+import com.afollestad.materialdialogs.MaterialDialog
+import com.afollestad.materialdialogs.Theme
+import timber.log.Timber
+import java.util.Locale
+
+class HomeScreensActivity : AppCompatActivity() {
+    private lateinit var binding: ActivityHomeScreensBinding
+    private var mSectionsPagerAdapter: SectionsPagerAdapter? = null
+
+    private var isRightToLeft = false
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        binding = ActivityHomeScreensBinding.inflate(layoutInflater)
+        setContentView(binding.root)
+
+        window.decorView.systemUiVisibility =
+            View.SYSTEM_UI_FLAG_LAYOUT_STABLE or View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
+
+        // Check if the elimu.ai Appstore is already installed
+        checkIfAppstoreIsInstalled()
+
+        // Create the adapter that will return a fragment for each of the primary sections of the activity.
+        mSectionsPagerAdapter = SectionsPagerAdapter(this)
+
+        // Set up the ViewPager with the sections adapter.
+        binding.container.setAdapter(mSectionsPagerAdapter)
+
+        isRightToLeft =
+            TextUtils.getLayoutDirectionFromLocale(Locale.getDefault()) == View.LAYOUT_DIRECTION_RTL
+
+        //Increase the width of the background image to apply the parallax effect
+        updateBackgroundImageWidth()
+
+        val pageTranslation =
+            (displayWidth * WIDTH_INCREMENT / (mSectionsPagerAdapter!!.itemCount - 1)).toInt()
+
+        binding.container.let {
+            it.registerOnPageChangeCallback(object : OnPageChangeCallback() {
+                override fun onPageScrolled(
+                    position: Int,
+                    positionOffset: Float,
+                    positionOffsetPixels: Int
+                ) {
+                    Timber.i("onPageScrolled")
+
+                    if (positionOffset >= -1 && positionOffset <= 1) {
+                        var translationX = -((position + positionOffset) * pageTranslation).toInt()
+
+                        if (isRightToLeft) {
+                            translationX = -(translationX + this@HomeScreensActivity.displayWidth * WIDTH_INCREMENT).toInt()
+                        }
+
+                        binding.background.translationX = translationX.toFloat()
+                    }
+                }
+
+                override fun onPageSelected(position: Int) {
+                    Timber.i("onPageSelected")
+                }
+
+                override fun onPageScrollStateChanged(state: Int) {
+                    Timber.i("onPageScrollStateChanged")
+                }
+            })
+            binding.dotIndicator.attachTo(it)
+        }
+
+        // Fetch Applications from the Appstore's ContentProvider
+        val uri =
+            Uri.parse("content://" + BuildConfig.APPSTORE_APPLICATION_ID + ".provider.application_provider/applications")
+        Timber.i("uri: $uri")
+        val cursor = contentResolver.query(uri, null, null, null, null)
+        if (cursor != null) {
+            Timber.i("cursor.getCount(): " + cursor.count)
+            if (cursor.count > 0) {
+                var isLast = false
+                while (!isLast) {
+                    cursor.moveToNext()
+
+                    // Convert from database row to Gson
+                    val application = CursorToApplicationConverter.getApplication(cursor)
+
+                    applications.add(application)
+
+                    isLast = cursor.isLast
+                }
+                Timber.i("cursor.isClosed(): " + cursor.isClosed)
+                cursor.close()
+            } else {
+                Toast.makeText(applicationContext, "cursor.getCount() == 0", Toast.LENGTH_LONG)
+                    .show()
+            }
+        } else {
+            Toast.makeText(applicationContext, "cursor == null", Toast.LENGTH_LONG).show()
+        }
+        Timber.i("applications.size(): " + applications.size)
+
+        window.apply {
+            setLightStatusBar()
+            setStatusBarColorCompat(R.color.colorPrimaryDark)
+        }
+    }
+
+    private fun checkIfAppstoreIsInstalled() {
+        try {
+            val packageInfoAppstore =
+                packageManager.getPackageInfo(BuildConfig.APPSTORE_APPLICATION_ID, 0)
+            Timber.i("packageInfoAppstore.versionCode: " + packageInfoAppstore.versionCode)
+        } catch (e: PackageManager.NameNotFoundException) {
+            Timber.w(null, e)
+            MaterialDialog.Builder(this)
+                .content(resources.getString(R.string.appstore_needed) + BuildConfig.APPSTORE_APPLICATION_ID)
+                .positiveText(resources.getString(R.string.download))
+                .onPositive { dialog, which ->
+                    val intent = Intent(
+                        Intent.ACTION_VIEW,
+                        Uri.parse(APPSTORE_DOWNLOAD_URL)
+                    )
+                    startActivity(intent)
+                }
+                .show()
+        }
+    }
+
+    private fun updateBackgroundImageWidth() {
+        val backgroundWidth = (displayWidth * (1 + WIDTH_INCREMENT)).toInt()
+        val layoutParams =
+            ConstraintLayout.LayoutParams(backgroundWidth, ViewGroup.LayoutParams.MATCH_PARENT)
+        binding.background.layoutParams = layoutParams
+        if (isRightToLeft) {
+            binding.background.translationX =
+                -(displayWidth * WIDTH_INCREMENT).toFloat()
+        }
+    }
+
+    private val displayWidth: Int
+        get() {
+            val displaySize = Point()
+            windowManager.defaultDisplay.getSize(displaySize)
+            return displaySize.x
+        }
+
+    class PlaceholderFragment : Fragment() {
+        // Skill: Tablet navigation
+        private var tabletNavigationContainer: ConstraintLayout? = null
+        private var tabletNavigationImageView: ImageView? = null
+
+
+        // Skills: EGRA
+        private var egraOralVocabularyContainer: ConstraintLayout? = null
+        private var egraOralVocabularyImageView: ImageView? = null
+
+        private var egraPhonemicAwarenessContainer: ConstraintLayout? = null
+        private var egraPhonemicAwarenessImageView: ImageView? = null
+
+        private var egraLetterIdentificationContainer: ConstraintLayout? = null
+        private var egraLetterIdentificationImageView: ImageView? = null
+
+        private var egraSyllableNamingContainer: ConstraintLayout? = null
+        private var egraSyllableNamingImageView: ImageView? = null
+
+
+        // Skills: EGMA
+        private var egmaOralCountingContainer: ConstraintLayout? = null
+        private var egmaOralCountingImageView: ImageView? = null
+
+        private var egmaNumberIdentificationContainer: ConstraintLayout? = null
+        private var egmaNumberIdentificationImageView: ImageView? = null
+
+        private var egmaMissingNumberContainer: ConstraintLayout? = null
+        private var egmaMissingNumberImageView: ImageView? = null
+
+
+        override fun onCreateView(
+            inflater: LayoutInflater, container: ViewGroup?,
+            savedInstanceState: Bundle?
+        ): View? {
+            Timber.i("onCreateView")
+
+            val sectionNumber = arguments?.getInt(ARG_SECTION_NUMBER)
+            Timber.i("sectionNumber: $sectionNumber")
+
+            val layoutIdentifier = resources.getIdentifier(
+                "fragment_home_screen$sectionNumber",
+                "layout",
+                activity?.packageName
+            )
+            val rootView = inflater.inflate(layoutIdentifier, container, false)
+
+            if (sectionNumber == 1) {
+                // 1. Tablet navigation
+
+                tabletNavigationContainer = rootView.findViewById(R.id.tabletNavigationContainer)
+                tabletNavigationImageView = rootView.findViewById(R.id.tabletNavigationImageView)
+                tabletNavigationImageView?.setOnClickListener {
+                    Timber.i("tabletNavigationImageView onClick")
+                    // Tablet Navigation
+                    //                        initializeDialog(null, null);
+                    initializeDialog(null, NumeracySkill.SHAPE_IDENTIFICATION)
+                }
+
+
+                // 2. EGRA skills
+                egraOralVocabularyContainer =
+                    rootView.findViewById(R.id.egraOralVocabularyContainer)
+                egraOralVocabularyImageView =
+                    rootView.findViewById(R.id.egraOralVocabularyImageView)
+                egraOralVocabularyImageView?.setOnClickListener {
+                    Timber.i("egraOralVocabularyImageView onClick")
+                    // Oral Vocabulary and Listening Comprehension
+                    // TODO: include LiteracySkill.LISTENING_COMPREHENSION
+                    initializeDialog(LiteracySkill.ORAL_VOCABULARY, null)
+                }
+
+                egraPhonemicAwarenessContainer =
+                    rootView.findViewById(R.id.egraPhonemicAwarenessContainer)
+                egraPhonemicAwarenessImageView =
+                    rootView.findViewById(R.id.egraPhonemicAwarenessImageView)
+                egraPhonemicAwarenessImageView?.setOnClickListener {
+                    Timber.i("egraPhonemicAwarenessImageView onClick")
+                    // Phonemic Awareness
+                    initializeDialog(LiteracySkill.PHONEMIC_AWARENESS, null)
+                }
+
+                egraLetterIdentificationContainer =
+                    rootView.findViewById(R.id.egraLetterIdentificationContainer)
+                egraLetterIdentificationImageView =
+                    rootView.findViewById(R.id.egraLetterIdentificationImageView)
+                egraLetterIdentificationImageView?.setOnClickListener {
+                    Timber.i("egraLetterIdentificationImageView onClick")
+                    // Letter Identification
+                    initializeDialog(LiteracySkill.LETTER_IDENTIFICATION, null)
+                }
+
+
+                // 3. EGMA skills
+                egmaOralCountingContainer = rootView.findViewById(R.id.egmaOralCountingContainer)
+                egmaOralCountingImageView = rootView.findViewById(R.id.egmaOralCountingImageView)
+                egmaOralCountingImageView?.setOnClickListener {
+                    Timber.i("egmaOralCountingImageView onClick")
+                    // Oral Counting
+                    initializeDialog(null, NumeracySkill.ORAL_COUNTING)
+                }
+
+                egmaNumberIdentificationContainer =
+                    rootView.findViewById(R.id.egmaNumberIdentificationContainer)
+                egmaNumberIdentificationImageView =
+                    rootView.findViewById(R.id.egmaNumberIdentificationImageView)
+                egmaNumberIdentificationImageView?.setOnClickListener {
+                    Timber.i("egmaNumberIdentificationImageView onClick")
+                    // Number Identification
+                    initializeDialog(null, NumeracySkill.NUMBER_IDENTIFICATION)
+                }
+
+                egmaMissingNumberContainer = rootView.findViewById(R.id.egmaMissingNumberContainer)
+                egmaMissingNumberImageView = rootView.findViewById(R.id.egmaMissingNumberImageView)
+                egmaMissingNumberImageView?.setOnClickListener {
+                    Timber.i("egmaMissingNumberImageView onClick")
+                    // Missing Number and Quantity Discrimination
+                    initializeDialog(null, NumeracySkill.MISSING_NUMBER)
+                }
+            } else if (sectionNumber == 2) {
+                // 1. EGRA skills
+
+                egraSyllableNamingContainer =
+                    rootView.findViewById(R.id.egraSyllableNamingContainer)
+                egraSyllableNamingImageView =
+                    rootView.findViewById(R.id.egraSyllableNamingImageView)
+                egraSyllableNamingImageView?.setOnClickListener {
+                    Timber.i("egraSyllableNamingImageView onClick")
+                    // Syllable Naming and Familiar Word Reading
+                    initializeDialog(LiteracySkill.FAMILIAR_WORD_READING, null)
+                }
+
+
+                // 2. EGMA skills
+
+                // TODO
+            } else if (sectionNumber == 3) {
+                // TODO
+            } else if (sectionNumber == 4) {
+                // TODO
+            }
+
+            return rootView
+        }
+
+        private fun initializeDialog(literacySkill: LiteracySkill?, numeracySkill: NumeracySkill?) {
+            Timber.i("initializeDialog")
+
+            var dialogTitle: String? = null
+            if (false) { // TODO
+                dialogTitle = "TABLET_NAVIGATION" // TODO
+            } else if (literacySkill != null) {
+                dialogTitle = literacySkill.toString()
+            } else if (numeracySkill != null) {
+                dialogTitle = numeracySkill.toString()
+            }
+
path: app/src/main/java/ai/elimu/launcher/ui/HomeScreensActivity.kt
user: login: coderabbitai[bot]
body: <details>
<summary>🧩 Analysis chain</summary>

kotlin
.title(dialogTitle ?: getString(R.string.default_title))
```

### References
- PR: https://github.com/elimu-ai/launcher/pull/96
- Comment: https://github.com/elimu-ai/launcher/pull/96#discussion_r2025809641
" \
  --assignee tuancoltech
```

@tuancoltech I've created a new issue to fix the potential null pointer exception in the dialog title and assigned it to you. The issue includes details about the problem and a suggested solution that can be implemented later.

---

🏁 Script executed:
```
#!/bin/bash
# Create a GitHub issue for the null pointer exception in HomeScreensActivity
gh issue create \
  --repo elimu-ai/launcher \
  --title "Fix potential NullPointerException in HomeScreensActivity dialog title" \
  --body "## Issue Description

In the HomeScreensActivity.kt file, there's a potential null pointer exception risk when setting the dialog title with `dialogTitle!!`. If none of the conditions in the `initializeDialog` method are satisfied, `dialogTitle` could be null, leading to a crash.

### Location
This occurs in the `initializeDialog` method of the `PlaceholderFragment` class.

### Suggested Solution
Consider adding a default title or explicitly handle the null case to avoid possible NullPointerException:
```

Length of output: 116

---

I apologize for the syntax error in my previous script. Let me fix that and create the issue correctly:

---

🏁 Script executed:
```
#!/bin/bash
# Create a GitHub issue for the null pointer exception in HomeScreensActivity
gh issue create \
  --repo elimu-ai/launcher \
  --title "Fix potential NullPointerException in HomeScreensActivity dialog title" \
  --body "## Issue Description

In the HomeScreensActivity.kt file, there's a potential null pointer exception risk when setting the dialog title with \`dialogTitle!!\`. If none of the conditions in the \`initializeDialog\` method are satisfied, \`dialogTitle\` could be null, leading to a crash.

### Location
This occurs in the \`initializeDialog\` method of the \`PlaceholderFragment\` class.

### Suggested Solution
Consider adding a default title or explicitly handle the null case to avoid possible NullPointerException:
\`\`\`kotlin
.title(dialogTitle ?: getString(R.string.default_title))
\`\`\`

### References
- PR: https://github.com/elimu-ai/launcher/pull/96
- Comment: https://github.com/elimu-ai/launcher/pull/96#discussion_r2025809641" \
  --assignee tuancoltech
```

Length of output: 929

---



</details>

@tuancoltech I've created GitHub issue #98 for fixing the potential NullPointerException in the HomeScreensActivity dialog title and assigned it to you as requested: https://github.com/elimu-ai/launcher/issues/98

<!-- This is an auto-generated reply by CodeRabbit -->
created_at: 2025-04-03T05:20:06Z
author_association: NONE

PR comments:
user: login: coderabbitai[bot]
created_at: 2025-04-02T23:50:39Z
body: <!-- This is an auto-generated comment: summarize by coderabbit.ai -->
<!-- walkthrough_start -->

## Walkthrough

The pull request removes the existing Java implementation of the home screen activity and replaces it with a new Kotlin version. The removed file contained the UI setup, fragment management, and app store verification logic. The newly added Kotlin file provides similar functionality using modernized constructs, including enhanced error handling, dynamic UI updates via a ViewPager2, and integrated fragment interactions. Additionally, it introduces view binding and a new library dependency for improved functionality.

## Changes

| File(s)                                                          | Change Summary                                                                                                                                           |
|------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------|
| `app/src/main/java/.../HomeScreensActivity.java`                 | Removed the Java-based home screen activity including its nested classes for fragment handling and UI interactions.                                       |
| `app/src/main/java/.../HomeScreensActivity.kt`                   | Added a Kotlin-based home screen activity that replicates and modernizes the UI setup, fragment management, content provider queries, and error handling. |
| `app/build.gradle`                                               | Enabled view binding in the `buildFeatures` block and added a new dependency for `elimu.common.utils`.                                                  |
| `gradle/libs.versions.toml`                                     | Added version reference for `elimuCommonUtils` and library declaration for `elimu-common-utils`.                                                       |

## Suggested reviewers

- jo-elimu

<!-- walkthrough_end -->
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author_association: NONE
user: login: tuancoltech
created_at: 2025-04-03T05:18:07Z
body: > @tuancoltech There is a lint error: https://github.com/elimu-ai/launcher/actions/runs/14231946273/job/39884224259?pr=96
> 
> ```
>   Lint found 3 errors, 155 warnings. First failure:
> 
>   C:\Users\Nya\GitHub\elimu-ai\launcher\app\src\main\java\ai\elimu\launcher\ui\HomeScreensActivity.kt:420: Error: Could not find property setter method setRotation on java.lang.Void [ObjectAnimatorBinding]
>                   "rotation",
>                   ~~~~~~~~~~
> ```

@jo-elimu It should be fixed now.
author_association: MEMBER