Saturday, August 24, 2013

Android RatingBar Example

A Rating Bar is used to show rating in Stars.The user can touch/drag or use arrow keys to set the rating when using the default size RatingBar.

RatingBar Example.

Android RatingBar


main.xml


<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:background="#C2C2A3">

    <RatingBar
        android:id="@+id/ratingBar1"
        android:layout_marginTop="50dp"
        android:layout_gravity="center_horizontal"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

    <Button
        android:id="@+id/button1"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="50dp"
        android:text="OK" />
</LinearLayout>
    
How to change the Number of Stars
Use  android:numStars   attribute to set the number of stars you want.

MainActivity.java


public class MainActivity extends Activity
{
        RatingBar ratingBar;
        Button btn;
    @Override
    public void onCreate(Bundle savedInstanceState) 
    {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
   
    ratingBar=(RatingBar)findViewById(R.id.ratingBar1);
    btn=(Button)findViewById(R.id.button1);
   
    // Set ChangeListener to Rating Bar
    ratingBar.setOnRatingBarChangeListener(new OnRatingBarChangeListener() {
        public void onRatingChanged(RatingBar ratingBar, float rating,
        boolean fromUser) {

        Toast.makeText(getApplicationContext(),"Your Selected Ratings  : " + String.valueOf(rating),Toast.LENGTH_LONG).show();
        
        }
        });
     
    btn.setOnClickListener(new View.OnClickListener() {
     
   
public void onClick(View arg0) {
// TODO Auto-generated method stub
float rating=ratingBar.getRating();
Toast.makeText(getApplicationContext(),"Your Selected Ratings  : " + String.valueOf(rating),Toast.LENGTH_LONG).show();
}
});
   
    }
   
    
}


How to Set The Rating at Run time
use method
ratingBar.setRating(4);   or pass any number like 3.5, 4.5 etc.


Android RatingBar


 

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