kotlinwrapper 0.1.0
A Python wrapper library named kotlinwrapper
Requires Python: >=3.6



        val radioGroup = findViewById<RadioGroup>(R.id.radioGroup)
        val clearBtn = findViewById<Button>(R.id.clearBtn)
        val wifi = findViewById<RadioButton>(R.id.wifi)
        val bluetooth = findViewById<RadioButton>(R.id.bluetooth)

        bluetooth.setOnCheckedChangeListener { _, isChecked ->
            if (isChecked) {
                Toast.makeText(this, "Bluetooth turned on", Toast.LENGTH_SHORT).show()
            }
        }

        wifi.setOnCheckedChangeListener { _, isChecked ->
            if (isChecked) {
                Toast.makeText(this, "Wi-Fi turned ON", Toast.LENGTH_SHORT).show()
            }
        }

        clearBtn.setOnClickListener {
            radioGroup.clearCheck()
            Toast.makeText(this, "Selection Cleared", Toast.LENGTH_SHORT).show()
        }
    
<RadioGroup android:id="@+id/radioGroup" ...>

    <RadioButton android:id="@+id/wifi" ... />

    <RadioButton android:id="@+id/bluetooth" ... />

    <RadioButton android:id="@+id/airplane" ... />

</RadioGroup>

<Button android:id="@+id/clearBtn" ... />




---------------------------------------------------------------------------------------------------------------------
val radioGroup = findViewById<RadioGroup>(R.id.radioGroup)
        val clearBtn = findViewById<Button>(R.id.clearBtn)

        radioGroup.setOnCheckedChangeListener { _, checkedId ->
            val message = when (checkedId) {
                R.id.wifi -> "Wi-Fi turned ON"
                R.id.bluetooth -> "Bluetooth turned ON"
                R.id.airplane -> "Airplane Mode turned ON"
                else -> ""
            }

                if (message.isNotEmpty()){
                Toast.makeText(this, message, Toast.LENGTH_SHORT).show()
            }
            
        }

clearBtn.setOnClickListener {
            radioGroup.clearCheck()
            Toast.makeText(this, "Selection Cleared", Toast.LENGTH_SHORT).show()
        }

-------------------------------------------------------------------------------------------------------------------------------

button7.setOnClickListener {
            val firstName = editTextText5.text.toString()
            val lastName = editTextText6.text.toString()
            val birthDate = editTextText7.text.toString()
            val country = editTextText8.text.toString()

            val message = "Name: $firstName $lastName\nBirthdate: $birthDate\nCountry: $country"
            Toast.makeText(this, message, Toast.LENGTH_LONG).show()
        }


-----------------------------------------------------------------------------------------------------------------------------------------

val usernameEditText = findViewById<EditText>(R.id.editTextText10)
        val passwordEditText = findViewById<EditText>(R.id.editTextTextPassword)
        val submitButton = findViewById<Button>(R.id.button8)

        submitButton.setOnClickListener {

            val username = usernameEditText.text.toString()
            val password = passwordEditText.text.toString()

            if (username.isEmpty() || password.isEmpty()) {
                Toast.makeText(this, "Please enter all fields.", Toast.LENGTH_SHORT).show()
            } else {
                val dialog = AlertDialog.Builder(this)
                    .setTitle("Login Success")
                    .setMessage("Welcome, $username!")
                    .setPositiveButton("OK", null)
                    .create()
                dialog.show()
            }
        }



--------------------------------------------------------------------------------------------------------------------------
        val btn = findViewById<Button>(R.id.btn)
        btn.setOnClickListener{
            Intent(this,SecondActivity::class.java).also{
                startActivity(it)

            }
        }

        val back = findViewById<Button>(R.id.back)
        back.setOnClickListener{
            finish()
        }
        val next = findViewById<Button>(R.id.next)
        next.setOnClickListener{
            Intent(this,ThirdActivity::class.java).also{
                startActivity(it)
            }
        }


-------------------------------------------------------------------------------------------------------------------------

        send.setOnClickListener {
            val nameText = name.text.toString()
            val ageText = age.text.toString()
            Intent(this, MainActivity2::class.java).also {
                it.putExtra("name", nameText)
                it.putExtra("age", ageText)
                startActivity(it)
            }
        }

        val displayText = findViewById<TextView>(R.id.displayText)
        val name  = intent.getStringExtra("name")
        val age = intent.getStringExtra(("age"))
        displayText.text = "Name :$name\nage:$age"
--------------------------------------------------------------------------------------------------------------------------
#drawable --> new ---> vector asset


custom_icon.xml :----
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">

    <item android:state_checked="true" android:drawable="@drawable/outline_arrow_downward_alt_24"/>
    <item android:state_checked="false" android:drawable="@drawable/outline_arrow_upward_alt_24"/>


</selector>


EACH button :------
android:button="@drawable/custom_icon"
---------------------------------------------------------------------------------------------------------------

Custom Toast :---

class MainActivity : AppCompatActivity() 
{

    // ✅ Reusable custom toast function
    private fun showCustomToast(message: String, imageResId: Int) 
    {
        // Inflate custom_toast.xml
        val layout = layoutInflater.inflate(R.layout.custom_toast, null)

        // Get views from custom layout
        val toastText = layout.findViewById<TextView>(R.id.toast_text)
        val toastIcon = layout.findViewById<ImageView>(R.id.toast_icon)

        // Set message and image
        toastText.text = message
        toastIcon.setImageResource(imageResId)

        // Build and show toast
        Toast(applicationContext).apply 
        {
            duration = Toast.LENGTH_SHORT
            view = layout
            show()
        }
    }

    override fun onCreate(savedInstanceState: Bundle?) 
    {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        // Example usage — call this wherever needed
        val button = findViewById<Button>(R.id.showToastButton)
        button.setOnClickListener 
        {
            showCustomToast("Hello, Anurag!", R.drawable.images)  // 🔁 Use your drawable image
        }
    }
}

----------------------------------------------------------------------------------------------------------------------------------------------------
res/menu/app_bar_menu.xml
<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto">

    <item
        android:id="@+id/miSettings"
        android:title="Settings"
        android:icon="@drawable/ic_settings"
        app:showAsAction="ifRoom" />

    <item
        android:id="@+id/miAddContact"
        android:title="Add Contact"
        android:icon="@drawable/ic_settings"
        app:showAsAction="ifRoom" />

    <item
        android:id="@+id/miSettings"
        android:title="Settings"
        android:icon="@drawable/ic_settings"
        app:showAsAction="ifRoom" />

    <item
        android:id="@+id/miSettings"
        android:title="Settings"
        android:icon="@drawable/ic_settings"
        app:showAsAction="ifRoom" />
</menu>



MainActivity.kt


package com.example.myapplication

import android.os.Bundle
import android.view.Menu
import android.view.MenuItem
import android.widget.Toast
import androidx.appcompat.app.AppCompatActivity

class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
    }

    // Inflate the menu
    override fun onCreateOptionsMenu(menu: Menu?): Boolean {
        menuInflater.inflate(R.menu.app_bar_menu, menu)
        return true
    }

    // Handle item clicks
    override fun onOptionsItemSelected(item: MenuItem): Boolean {
        when (item.itemId) {
            R.id.miAddContact -> {
                Toast.makeText(this, "You clicked on Add Contact", Toast.LENGTH_SHORT).show()
            }
            R.id.miFavorites -> {
                Toast.makeText(this, "You clicked on Favorites", Toast.LENGTH_SHORT).show()
            }
            R.id.miSettings -> {
                Toast.makeText(this, "You clicked on Settings", Toast.LENGTH_SHORT).show()
            }
            R.id.miClose -> {
                finish() // Closes the activity
            }
            R.id.miFeedback -> {
                Toast.makeText(this, "You clicked on Feedback", Toast.LENGTH_SHORT).show()
            }
        }
        return true
    }
}
---------------------------------------------------------------------------------------------------------------------------------------
package com.example.myapplication

import android.os.Bundle
import android.view.LayoutInflater
import android.widget.*
import androidx.appcompat.app.AppCompatActivity

class MainActivity : AppCompatActivity() {

    private fun showCustomToast(message: String) {
        val layout = layoutInflater.inflate(R.layout.custom_toast, null)
        val toastText = layout.findViewById<TextView>(R.id.toast_text)
        toastText.text = message

        Toast(applicationContext).apply {
            duration = Toast.LENGTH_SHORT
            view = layout
            show()
        }
    }

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        val num1 = findViewById<EditText>(R.id.num1)
        val num2 = findViewById<EditText>(R.id.num2)

        val btnAdd = findViewById<Button>(R.id.btnAdd)
        val btnSub = findViewById<Button>(R.id.btnSub)
        val btnMul = findViewById<Button>(R.id.btnMul)
        val btnDiv = findViewById<Button>(R.id.btnDiv)

        fun getNumbers(): Pair<Double, Double>? {
            val a = num1.text.toString()
            val b = num2.text.toString()
            if (a.isEmpty() || b.isEmpty()) {
                showCustomToast("Please enter both numbers")
                return null
            }
            return Pair(a.toDouble(), b.toDouble())
        }

        btnAdd.setOnClickListener {
            getNumbers()?.let {
                val result = it.first + it.second
                showCustomToast("Result: $result")
            }
        }

        btnSub.setOnClickListener {
            getNumbers()?.let {
                val result = it.first - it.second
                showCustomToast("Result: $result")
            }
        }

        btnMul.setOnClickListener {
            getNumbers()?.let {
                val result = it.first * it.second
                showCustomToast("Result: $result")
            }
        }

        btnDiv.setOnClickListener {
            getNumbers()?.let {
                if (it.second == 0.0) {
                    showCustomToast("Cannot divide by 0")
                } else {
                    val result = it.first / it.second
                    showCustomToast("Result: $result")
                }
            }
        }
    }
}



-------------------------------------------------------
package com.example.myapplication

import android.os.Bundle
import android.view.View
import android.widget.Button
import android.widget.Toast
import androidx.appcompat.app.AlertDialog
import androidx.appcompat.app.AppCompatActivity

class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        // Button for add contact dialog
        val btnDialog1 = findViewById<Button>(R.id.btnDialog1)
        btnDialog1.setOnClickListener {
            val addContactDialog = AlertDialog.Builder(this)
                .setTitle("Add contact")
                .setMessage("Do you want to add Mr. Poop to your contacts list?")
                .setIcon(R.drawable.ic_add_contact)
                .setPositiveButton("Yes") { _, _ ->
                    Toast.makeText(this, "You added Mr. Poop to your contact list", Toast.LENGTH_SHORT).show()
                }
                .setNegativeButton("No") { _, _ ->
                    Toast.makeText(this, "You didn't add Mr. Poop to your contact list", Toast.LENGTH_SHORT).show()
                }
                .create()

            addContactDialog.show()
        }

        // Button for single-choice dialog
        val btnDialog2 = findViewById<Button>(R.id.btnDialog2)
        btnDialog2.setOnClickListener {
            val options = arrayOf("First Item", "Second Item", "Third Item")

            val singleChoiceDialog = AlertDialog.Builder(this)
                .setTitle("Choose one of these options")
                .setSingleChoiceItems(options, 0) { _, i ->
                    Toast.makeText(this, "You clicked on ${options[i]}", Toast.LENGTH_SHORT).show()
                }
                .setPositiveButton("Accept") { _, _ ->
                    Toast.makeText(this, "You accepted the SingleChoiceDialog", Toast.LENGTH_SHORT).show()
                }
                .setNegativeButton("Decline") { _, _ ->
                    Toast.makeText(this, "You declined the SingleChoiceDialog", Toast.LENGTH_SHORT).show()
                }
                .create()

            singleChoiceDialog.show()
        }
    }
}


<Button
    android:id="@+id/btnDialog1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Add Contact Dialog"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    android:layout_margin="16dp" />

<Button
    android:id="@+id/btnDialog2"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Single Choice Dialog"
    app:layout_constraintTop_toBottomOf="@id/btnDialog1"
    app:layout_constraintStart_toStartOf="parent"
    android:layout_margin="16dp" />

--------------------------------------------------------------------
spinner

res/values/strings.xml

<resources>
    <string name="app_name">MyApplication</string>

    <!-- String array used to fill Spinner items -->
    <string-array name="months">
        <item>January</item>
        <item>February</item>
        <item>March</item>
        <item>April</item>
        <item>May</item>
        <item>June</item>
        <item>July</item>
        <item>August</item>
        <item>September</item>
        <item>October</item>
        <item>November</item>
        <item>December</item>
    </string-array>
</resources>

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity"
    android:padding="16dp">

    <!-- Spinner dropdown to show month list -->
    <Spinner
        android:id="@+id/spMonths"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:entries="@array/months" <!-- Link string-array from strings.xml -->
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.5" />
</androidx.constraintlayout.widget.ConstraintLayout>

package com.example.myapplication

import android.os.Bundle
import android.view.View
import android.widget.AdapterView
import android.widget.Spinner
import android.widget.Toast
import androidx.appcompat.app.AppCompatActivity

class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        // 1. Get reference to Spinner from layout
        val spMonths = findViewById<Spinner>(R.id.spMonths)

        // 2. Set listener to detect item selection from spinner
        spMonths.onItemSelectedListener = object : AdapterView.OnItemSelectedListener {

            // This method is called when an item is selected
            override fun onItemSelected(
                parent: AdapterView<*>?,  // Spinner view
                view: View?,              // Row view (not used here)
                position: Int,            // Index of selected item
                id: Long                  // Row ID (not used here)
            ) {
                // Get selected item text using position
                val selectedMonth = parent?.getItemAtPosition(position).toString()

                // Show a toast message
                Toast.makeText(this@MainActivity, "You selected $selectedMonth", Toast.LENGTH_LONG).show()
            }

            // This method is called if nothing is selected (optional)
            override fun onNothingSelected(parent: AdapterView<*>?) {
                // Optional: You can leave this blank or add default action
            }
        }
    }
}
-------------------------------------------------------------------------------------------------------------------------------------
package com.example.myapplication

import android.os.Bundle
import android.widget.Button
import androidx.appcompat.app.AppCompatActivity

class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        // Create fragment instances
        val firstFragment = FirstFragment()
        val secondFragment = SecondFragment()

        // Set initial fragment to FirstFragment
        supportFragmentManager.beginTransaction().apply {
            replace(R.id.flFragment, firstFragment)
            commit()
        }

        // Find buttons from layout
        val btnFragment1 = findViewById<Button>(R.id.btnFragment1)
        val btnFragment2 = findViewById<Button>(R.id.btnFragment2)

        // Set listener for Fragment1 button
        btnFragment1.setOnClickListener {
            supportFragmentManager.beginTransaction().apply {
                replace(R.id.flFragment, firstFragment)
                commit()
            }
        }

        // Set listener for Fragment2 button
        btnFragment2.setOnClickListener {
            supportFragmentManager.beginTransaction().apply {
                replace(R.id.flFragment, secondFragment)
                commit()
            }
        }
    }
}

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <!-- Button to load FirstFragment -->
    <Button
        android:id="@+id/btnFragment1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="First Fragment"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        android:layout_margin="16dp" />

    <!-- Button to load SecondFragment -->
    <Button
        android:id="@+id/btnFragment2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Second Fragment"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        android:layout_margin="16dp" />

    <!-- FrameLayout container to load fragments -->
    <FrameLayout
        android:id="@+id/flFragment"
        android:layout_width="0dp"
        android:layout_height="0dp"
        app:layout_constraintTop_toBottomOf="@id/btnFragment1"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        android:layout_marginTop="16dp" />
</androidx.constraintlayout.widget.ConstraintLayout>


FirstFragment.kt

package com.example.myapplication

import android.os.Bundle
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import androidx.fragment.app.Fragment

class FirstFragment : Fragment() {
    override fun onCreateView(
        inflater: LayoutInflater, container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View? {
        // Inflate layout for FirstFragment
        return inflater.inflate(R.layout.fragment_first, container, false)
    }
}

SecondFragment.kt

package com.example.myapplication

import android.os.Bundle
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import androidx.fragment.app.Fragment

class SecondFragment : Fragment() {
    override fun onCreateView(
        inflater: LayoutInflater, container: ViewGroup?,
        savedInstanceState: Bundle?
    ): View? {
        // Inflate layout for SecondFragment
        return inflater.inflate(R.layout.fragment_second, container, false)
    }
}

fragment_first.xml

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#FFE4B5">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="This is First Fragment"
        android:layout_gravity="center"
        android:textSize="18sp"/>
</FrameLayout>


fragment_second.xml

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#AFEEEE">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="This is Second Fragment"
        android:layout_gravity="center"
        android:textSize="18sp"/>
</FrameLayout>

-----------------------------------------------------------------------------------------------------------------------------------------
DBHelper.kt
package com.example.myapplication

import android.content.ContentValues
import android.content.Context
import android.database.sqlite.SQLiteDatabase
import android.database.sqlite.SQLiteOpenHelper

class DBHelper(context: Context) :
    SQLiteOpenHelper(context, "UserDB", null, 1) {

    override fun onCreate(db: SQLiteDatabase?) {
        // Table with ID, Name, and Age
        db?.execSQL("CREATE TABLE users(id INTEGER PRIMARY KEY AUTOINCREMENT, name TEXT, age INTEGER)")
    }

    override fun onUpgrade(db: SQLiteDatabase?, oldVersion: Int, newVersion: Int) {
        // Drops table if exists and recreates it
        db?.execSQL("DROP TABLE IF EXISTS users")
        onCreate(db)
    }

    // Insert user into table
    fun insertUser(name: String, age: Int): Boolean {
        val db = writableDatabase
        val values = ContentValues()
        values.put("name", name)
        values.put("age", age)
        val result = db.insert("users", null, values)
        return result != -1L
    }

    // Read all users
    fun getAllUsers(): String {
        val db = readableDatabase
        val cursor = db.rawQuery("SELECT * FROM users", null)
        val buffer = StringBuffer()
        while (cursor.moveToNext()) {
            buffer.append("ID: ${cursor.getInt(0)}\n")
            buffer.append("Name: ${cursor.getString(1)}\n")
            buffer.append("Age: ${cursor.getInt(2)}\n\n")
        }
        cursor.close()
        return buffer.toString()
    }

    // Update user by ID
    fun updateUser(id: Int, name: String, age: Int): Boolean {
        val db = writableDatabase
        val values = ContentValues()
        values.put("name", name)
        values.put("age", age)
        val result = db.update("users", values, "id=?", arrayOf(id.toString()))
        return result > 0
    }

    // Delete user by ID
    fun deleteUser(id: Int): Boolean {
        val db = writableDatabase
        val result = db.delete("users", "id=?", arrayOf(id.toString()))
        return result > 0
    }
}



Activity_xml
<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="vertical"
        android:padding="16dp">

        <EditText
            android:id="@+id/editId"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:hint="Enter ID (for Update/Delete)"
            android:inputType="number" />

        <EditText
            android:id="@+id/editName"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:hint="Enter Name" />

        <EditText
            android:id="@+id/editAge"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:hint="Enter Age"
            android:inputType="number" />

        <Button
            android:id="@+id/btnInsert"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="Insert" />

        <Button
            android:id="@+id/btnView"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="View All" />

        <Button
            android:id="@+id/btnUpdate"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="Update" />

        <Button
            android:id="@+id/btnDelete"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="Delete" />
    </LinearLayout>
</ScrollView>




MainActivity
package com.example.myapplication

import android.os.Bundle
import android.widget.*
import androidx.appcompat.app.AppCompatActivity

class MainActivity : AppCompatActivity() {

    lateinit var dbHelper: DBHelper

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        dbHelper = DBHelper(this)

        val idInput = findViewById<EditText>(R.id.editId)
        val nameInput = findViewById<EditText>(R.id.editName)
        val ageInput = findViewById<EditText>(R.id.editAge)
        val insertBtn = findViewById<Button>(R.id.btnInsert)
        val viewBtn = findViewById<Button>(R.id.btnView)
        val updateBtn = findViewById<Button>(R.id.btnUpdate)
        val deleteBtn = findViewById<Button>(R.id.btnDelete)

        // INSERT button click
        insertBtn.setOnClickListener {
            val name = nameInput.text.toString()
            val age = ageInput.text.toString().toIntOrNull()
            if (name.isNotEmpty() && age != null) {
                val success = dbHelper.insertUser(name, age)
                Toast.makeText(this, if (success) "Inserted" else "Failed", Toast.LENGTH_SHORT).show()
            } else {
                Toast.makeText(this, "Fill valid name and age", Toast.LENGTH_SHORT).show()
            }
        }

        // VIEW button click
        viewBtn.setOnClickListener {
            val result = dbHelper.getAllUsers()
            showMessage("All Users", result)
        }

        // UPDATE button click
        updateBtn.setOnClickListener {
            val id = idInput.text.toString().toIntOrNull()
            val name = nameInput.text.toString()
            val age = ageInput.text.toString().toIntOrNull()
            if (id != null && name.isNotEmpty() && age != null) {
                val success = dbHelper.updateUser(id, name, age)
                Toast.makeText(this, if (success) "Updated" else "Failed", Toast.LENGTH_SHORT).show()
            } else {
                Toast.makeText(this, "Fill valid ID, name, and age", Toast.LENGTH_SHORT).show()
            }
        }

        // DELETE button click
        deleteBtn.setOnClickListener {
            val id = idInput.text.toString().toIntOrNull()
            if (id != null) {
                val success = dbHelper.deleteUser(id)
                Toast.makeText(this, if (success) "Deleted" else "Failed", Toast.LENGTH_SHORT).show()
            } else {
                Toast.makeText(this, "Enter valid ID", Toast.LENGTH_SHORT).show()
            }
        }
    }

    // Helper to show result in dialog
    private fun showMessage(title: String, message: String) {
        val dialog = android.app.AlertDialog.Builder(this)
        dialog.setTitle(title)
        dialog.setMessage(message)
        dialog.setPositiveButton("OK", null)
        dialog.show()
    }
}


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<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <!-- Horizontal ProgressBar (initially hidden) -->
    <ProgressBar
        android:id="@+id/progressBar"
        style="@android:style/Widget.ProgressBar.Horizontal"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginTop="100dp"
        android:max="100"
        android:progress="0"
        android:visibility="gone"
        android:progressTint="@android:color/holo_blue_light"
        app:layout_constraintTop_toTopOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent" />

    <!-- Start Button -->
    <Button
        android:id="@+id/startButton"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Start Progress"
        app:layout_constraintTop_toBottomOf="@id/progressBar"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        android:layout_marginTop="20dp" />

</androidx.constraintlayout.widget.ConstraintLayout>



package com.example.myapplication

import android.os.Bundle
import android.os.Handler
import android.os.Looper
import android.view.View
import android.widget.Button
import android.widget.ProgressBar
import androidx.appcompat.app.AppCompatActivity

class MainActivity : AppCompatActivity() {

    private lateinit var progressBar: ProgressBar
    private lateinit var startButton: Button

    private var progressStatus = 0 // Track current progress
    private val handler = Handler(Looper.getMainLooper()) // UI thread handler

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        // Link XML views to Kotlin variables
        progressBar = findViewById(R.id.progressBar)
        startButton = findViewById(R.id.startButton)

        // Set up button click listener
        startButton.setOnClickListener {
            progressBar.visibility = View.VISIBLE // Show progress bar
            progressBar.progress = 0 // Reset progress
            progressStatus = 0

            // Start background thread to simulate progress
            Thread {
                while (progressStatus < 100) {
                    progressStatus += 1

                    // Update progress on UI thread
                    handler.post {
                        progressBar.progress = progressStatus
                    }

                    Thread.sleep(50) // Simulate work (delay)
                }
            }.start()
        }
    }
}
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