<?xml version="1.0" encoding="utf-8"?> 
 
   
   
 

package com.example.blogtest; 
import android.support.v7.app.AppCompatActivity; 
import android.os.Bundle; 
import android.view.Gravity; 
import android.widget.RatingBar; 
import android.widget.Toast; 
public class MainActivity extends AppCompatActivity { 
  private RatingBar rb_main_rating; 
  @Override 
  protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 
    //获得RatingBar的控件 
    rb_main_rating = (RatingBar) findViewById(R.id.rb_main_rating); 
    //给控件设置监听事件 
    rb_main_rating.setOnRatingBarChangeListener(new RatingBar.OnRatingBarChangeListener() { 
      @Override 
      public void onRatingChanged(RatingBar ratingBar, float rating, boolean fromUser) { 
        Toast t=Toast.makeText(MainActivity.this,"您的评分为："+rating,Toast.LENGTH_SHORT); 
        t.setGravity(Gravity.CENTER,0,0); 
        t.show(); 
      } 
    }); 
  } 
}