RatingBar

Android RatingBar can be utilized to get the rating from the client. The Rating restores a coasting point number. It might be 2.0, 3.5, 4.0 and so forth. 

Android RatingBar shows the rating in stars. Android RatingBar is the subclass of AbsSeekBar class. 

The getRating() technique for android RatingBar class restores the rating number.

Android RatingBar Example

Let's see the simple example of rating bar in android.

activity_main.xml

Drag the RatingBar and Button from the pallete, now the activity_main.xml file will like this:

<RelativeLayout xmlns:androclass="http://schemas.android.com/apk/res/android"  
    xmlns:tools="http://schemas.android.com/tools"  
    android:layout_width="match_parent"  
    android:layout_height="match_parent"  
    tools:context=".MainActivity" >  

    <RatingBar  
        android:id="@+id/ratingBar1"  
        android:layout_width="wrap_content"  
        android:layout_height="wrap_content"  
        android:layout_alignParentTop="true"  
        android:layout_centerHorizontal="true"  
        android:layout_marginTop="44dp" />  

    <Button  
        android:id="@+id/button1"  
        android:layout_width="wrap_content"  
        android:layout_height="wrap_content"  
        android:layout_alignLeft="@+id/ratingBar1"  
        android:layout_below="@+id/ratingBar1"  
        android:layout_marginLeft="92dp"  
        android:layout_marginTop="66dp"  
        android:text="submit" />  

RelativeLayout>  

Activity class

Let's write the code to display the rating of the user.

package com.example.rating;  
import android.os.Bundle;  
import android.app.Activity;  
import android.view.Menu;  
import android.view.View;  
import android.view.View.OnClickListener;  
import android.widget.Button;  
import android.widget.RatingBar;  
import android.widget.Toast;  
public class MainActivity extends Activity {  
    RatingBar ratingbar1;  
    Button button;  
    @Override  
    protected void onCreate(Bundle savedInstanceState) {  
        super.onCreate(savedInstanceState);  
        setContentView(R.layout.activity_main);  
        addListenerOnButtonClick();  
    }  

    public void addListenerOnButtonClick(){  
        ratingbar1=(RatingBar)findViewById(R.id.ratingBar1);  
        button=(Button)findViewById(R.id.button1);  
        //Performing action on Button Click  
        button.setOnClickListener(new OnClickListener(){  

            @Override  
            public void onClick(View arg0) {  
                //Getting the rating and displaying it on the toast  
                String rating=String.valueOf(ratingbar1.getRating());  
                Toast.makeText(getApplicationContext(), rating, Toast.LENGTH_LONG).show();  
            }  

        });  
    }  

    @Override  
    public boolean onCreateOptionsMenu(Menu menu) {  
        // Inflate the menu; this adds items to the action bar if it is present.  
        getMenuInflater().inflate(R.menu.activity_main, menu);  
        return true;  
    }  
}