Auto Image Slider in Android with Example

28 Nov, 2021
Auto Image Slider is one of the most seen UI components in Android. This type of slider is mostly seen inside the apps of big E-commerce sites such as Flipkart, Amazon, and many more. Auto Image Slider is used to represent data in the form of slides that changes after a specific interval of time. In this article, we will take a look at How to Create Auto Image Slider on Android. We will use the SliderView library to add this type of UI component in our app.  
Note: You may also refer to Image Slider in Android using ViewPager.
Now we will see the Implementation of this SliderView in Android. 
A sample GIF is given below to get an idea about what we are going to do in this article. Note that we are going to implement this project using the Java language. 
Step 1: Create a New Project
To create a new project in Android Studio please refer to How to Create/Start a New Project in Android Studio. Note that select Java as the programming language.
Step 2: Add dependency of Slider View in build.gradle file
Navigate to the Gradle scripts and then to build.gradle(Module) level. Add below line in build.gradle file in the dependencies section.
// dependency sor slider view
implementation ‘com.github.smarteist:autoimageslider:1.3.9’
// dependency for loading image from url
implementation “com.github.bumptech.glide:glide:4.11.0”
Step 3: Add internet permission in the AndroidManifest.xml file
Navigate to the app > Manifest to open the Manifest file and add below two lines.
<!–Permission for internet–>
<uses-permission android:name=”android.permission.INTERNET” />
<uses-permission android:name=”android.permission.ACCESS_NETWORK_STATE” />
Step 4: Working with the activity_main.xml file
Go to the activity_main.xml file and refer to the following code. Below is the code for the activity_main.xml file.
XML
<?xml version="1.0" encoding="utf-8"?><RelativeLayout     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">      <!--    slideranimation duration is to set duration for transition between two slides    sliderautocycledirection is to set animationbetween transition of your slides    sliderindicator enables is used to display the indicators for slider    slider indicator gravity is to set gravity for indicator gravity    slider indicator margin is to set margin for indicator    slider indicator orientation is used to add orientation for slider    slider indicator padding is use to add padding to indicator    slider indicator selected color is use to specify selected color    and slider indicator unselected color is use to specify the color when the slider is unselected    slider scroll time in sec is used to specify scrolling time in seconds    -->    <com.smarteist.autoimageslider.SliderView        android:id="@+id/slider"        android:layout_width="match_parent"        android:layout_height="150dp"        android:layout_centerInParent="true"        app:sliderAnimationDuration="600"        app:sliderAutoCycleDirection="back_and_forth"        app:sliderIndicatorAnimationDuration="600"        app:sliderIndicatorEnabled="true"        app:sliderIndicatorGravity="center_horizontal|bottom"        app:sliderIndicatorMargin="15dp"        app:sliderIndicatorOrientation="horizontal"        app:sliderIndicatorPadding="3dp"        app:sliderIndicatorRadius="2dp"        app:sliderIndicatorSelectedColor="#5A5A5A"        app:sliderIndicatorUnselectedColor="#FFF"        app:sliderScrollTimeInSec="1" />  </RelativeLayout>
Step 5: Create a new Modal class for storing data
Navigate to app > java > your app’s package name and then right-click on it and New > Java class and name your Model class as SliderData and below code inside that Java class. Below is the code for the SliderData.java file. Comments are added inside the code to understand the code in more detail.
Java
public class SliderData {      // image url is used to     // store the url of image    private String imgUrl;      // Constructor method.    public SliderData(String imgUrl) {        this.imgUrl = imgUrl;    }      // Getter method    public String getImgUrl() {        return imgUrl;    }      // Setter method    public void setImgUrl(String imgUrl) {        this.imgUrl = imgUrl;    }}
Step 6: Create an XML file for the items of SliderView 
Navigate to the app > res > layout > Right-click on it and select New > Layout Resource File and then name your XML file as slider_layout.xml. After creating this file add the below code to it.  
XML
<?xml version="1.0" encoding="utf-8"?><RelativeLayout     xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent">      <!--Image we will display is our slider view-->    <ImageView        android:id="@+id/myimage"        android:layout_width="400dp"        android:layout_height="300dp"        android:layout_centerHorizontal="true"        android:contentDescription="@string/app_name" />  </RelativeLayout>
Step 7: Create Adapter Class for setting data to each item of our SliderView
Navigate to app > java > your app’s package name and then right-click on it and New > Java class and name your class as SliderAdapter and below code inside that Java class. Below is the code for the SliderAdapter.java file. Comments are added inside the code to understand the code in more detail.
Java
import android.content.Context;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.ImageView;  import com.bumptech.glide.Glide;import com.smarteist.autoimageslider.SliderViewAdapter;  import java.util.ArrayList;import java.util.List;  public class SliderAdapter extends SliderViewAdapter<SliderAdapter.SliderAdapterViewHolder> {          // list for storing urls of images.    private final List<SliderData> mSliderItems;          // Constructor    public SliderAdapter(Context context, ArrayList<SliderData> sliderDataArrayList) {        this.mSliderItems = sliderDataArrayList;    }      // We are inflating the slider_layout     // inside on Create View Holder method.    @Override    public SliderAdapterViewHolder onCreateViewHolder(ViewGroup parent) {        View inflate = LayoutInflater.from(parent.getContext()).inflate(R.layout.slider_layout, null);        return new SliderAdapterViewHolder(inflate);    }      // Inside on bind view holder we will    // set data to item of Slider View.    @Override    public void onBindViewHolder(SliderAdapterViewHolder viewHolder, final int position) {          final SliderData sliderItem = mSliderItems.get(position);          // Glide is use to load image        // from url in your imageview.        Glide.with(viewHolder.itemView)                .load(sliderItem.getImgUrl())                .fitCenter()                .into(viewHolder.imageViewBackground);    }      // this method will return    // the count of our list.    @Override    public int getCount() {        return mSliderItems.size();    }      static class SliderAdapterViewHolder extends SliderViewAdapter.ViewHolder {        // Adapter class for initializing         // the views of our slider view.        View itemView;        ImageView imageViewBackground;          public SliderAdapterViewHolder(View itemView) {            super(itemView);            imageViewBackground = itemView.findViewById(R.id.myimage);            this.itemView = itemView;        }    }}
Step 8: Working with the MainActivity.java file
Go to the MainActivity.java file and refer to the following code. Below is the code for the MainActivity.java file. Comments are added inside the code to understand the code in more detail.
Java
import android.os.Bundle;import androidx.appcompat.app.AppCompatActivity;import com.smarteist.autoimageslider.SliderView;import java.util.ArrayList;  public class MainActivity extends AppCompatActivity {    // Urls of our images.    String url1 = "https://www.geeksforgeeks.org/wp-content/uploads/gfg_200X200-1.png";    String url2 = "https://qphs.fs.quoracdn.net/main-qimg-8e203d34a6a56345f86f1a92570557ba.webp";    String url3 = "https://bizzbucket.co/wp-content/uploads/2020/08/Life-in-The-Metro-Blog-Title-22.png";      @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);                  // we are creating array list for storing our image urls.        ArrayList<SliderData> sliderDataArrayList = new ArrayList<>();                  // initializing the slider view.        SliderView sliderView = findViewById(R.id.slider);                  // adding the urls inside array list        sliderDataArrayList.add(new SliderData(url1));        sliderDataArrayList.add(new SliderData(url2));        sliderDataArrayList.add(new SliderData(url3));                  // passing this array list inside our adapter class.        SliderAdapter adapter = new SliderAdapter(this, sliderDataArrayList);                  // below method is used to set auto cycle direction in left to         // right direction you can change according to requirement.        sliderView.setAutoCycleDirection(SliderView.LAYOUT_DIRECTION_LTR);                  // below method is used to         // setadapter to sliderview.        sliderView.setSliderAdapter(adapter);                  // below method is use to set         // scroll time in seconds.        sliderView.setScrollTimeInSec(3);                  // to set it scrollable automatically        // we use below method.        sliderView.setAutoCycle(true);                  // to start autocycle below method is used.        sliderView.startAutoCycle();    }}
Check out the project on this link: https://github.com/ChaitanyaMunje/GFGImageSlider
kapoorsagar226
android
Technical Scripter 2020
Android
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Technical Scripter
Java
Android
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