(25) Android RatingBar Example

Android RatingBar Example

RatingBar can be used to get the rating from the user. The Rating returns a floating-point number. It may be 2.0, 3.5, 4.0 etc.

The getRating() method of RatingBar class returns the rating number.

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Example of Android RatingBar

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:

File: activity_main.xml

1. <RelativeLayout xmlns:androclass="http://schemas.android.com/apk/res/android"  
2.     xmlns:tools="http://schemas.android.com/tools"  
3.     android:layout_width="match_parent"  
4.     android:layout_height="match_parent"  
5.     tools:context=".MainActivity" >  
6.   
7.     <RatingBar  
8.         android:id="@+id/ratingBar1"  
9.         android:layout_width="wrap_content"  
10.         android:layout_height="wrap_content"  
11.         android:layout_alignParentTop="true"  
12.         android:layout_centerHorizontal="true"  
13.         android:layout_marginTop="44dp" />  
14.   
15.     <Button  
16.         android:id="@+id/button1"  
17.         android:layout_width="wrap_content"  
18.         android:layout_height="wrap_content"  
19.         android:layout_alignLeft="@+id/ratingBar1"  
20.         android:layout_below="@+id/ratingBar1"  
21.         android:layout_marginLeft="92dp"  
22.         android:layout_marginTop="66dp"  
23.         android:text="submit" />  
24.   
25. </RelativeLayout>  

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Activity class

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

File: MainActivity.java

1. package com.example.rating;  
2.   
3. import android.os.Bundle;  
4. import android.app.Activity;  
5. import android.view.Menu;  
6. import android.view.View;  
7. import android.view.View.OnClickListener;  
8. import android.widget.Button;  
9. import android.widget.RatingBar;  
10. import android.widget.Toast;  
11.   
12. public class MainActivity extends Activity {  
13.     RatingBar ratingbar1;  
14.     Button button;  
15.     @Override  
16.     protected void onCreate(Bundle savedInstanceState) {  
17.         super.onCreate(savedInstanceState);  
18.         setContentView(R.layout.activity_main);  
19.         addListenerOnButtonClick();  
20.     }  
21.   
22.     public void addListenerOnButtonClick(){  
23.         ratingbar1=(RatingBar)findViewById(R.id.ratingBar1);  
24.         button=(Button)findViewById(R.id.button1);  
25.         //Performing action on Button Click  
26.         button.setOnClickListener(new OnClickListener(){  
27.   
28.             @Override  
29.             public void onClick(View arg0) {  
30.                 //Getting the rating and displaying it on the toast  
31.                 String rating=String.valueOf(ratingbar1.getRating());  
32.                 Toast.makeText(getApplicationContext(), rating, Toast.LENGTH_LONG).show();  
33.             }  
34.               
35.         });  
36.     }  
37.     @Override  
38.     public boolean onCreateOptionsMenu(Menu menu) {  
39.         // Inflate the menu; this adds items to the action bar if it is present.  
40.         getMenuInflater().inflate(R.menu.activity_main, menu);  
41.         return true;  
42.     }  
43.   
44. }  

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download this example

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Output: