Android Rating Bar Tutorial

Introduction of Android Rating Bar

Situation : We are using android application and we want to rate this.

For this purpose android provide rating bar control.

How to listen rating bar

• First get the instance of rating bar.

   ratingBar = (RatingBar) findViewById(R.id.ratingBar);
   

• Then apply the rating change listener for this rating bar.

   ratingBar.setOnRatingBarChangeListener(new OnRatingBarChangeListener() {
    public void onRatingChanged(RatingBar ratingBar, float rating,boolean fromUser) {
    
     write your code
    
    }
   });
   
   

Example to display rating by user

1. Make layout file(main.xml) which contains a button. If we click on button it change to screen2.
   
   

   <?xml version="1.0" encoding="utf-8"?>
   <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
       android:id="@+id/linearLayout1"
       android:layout_width="fill_parent"
       android:layout_height="fill_parent"
       android:orientation="vertical" >
    
       <RatingBar
           android:id="@+id/ratingBar"
           android:layout_width="wrap_content"
           android:layout_height="wrap_content"
           android:numStars="4"
           android:stepSize="1.0"
           android:rating="2.0" />
    
   </LinearLayout>
   

2. Then apply setOnRatingBarChangeListener
   
   

   public class mainactivity extends Activity {
    
    private RatingBar ratingBar;
    
    @Override
    public void onCreate(Bundle savedInstanceState) {
     super.onCreate(savedInstanceState);
     setContentView(R.layout.main);
     addListenerOnRatingBar();
    }
    
     public void addListenerOnRatingBar() {
    
    ratingBar = (RatingBar) findViewById(R.id.ratingBar);
    ratingBar.setOnRatingBarChangeListener(new OnRatingBarChangeListener() {
     public void onRatingChanged(RatingBar ratingBar, float rating,boolean fromUser) {
    
         Toast.makeText(MyAndroidAppActivity.this,
          String.valueOf(rating), Toast.LENGTH_SHORT).show();
    
     }
    });
    
   }
   
   

3. Output :