Android App中使用RatingBar实现星级打分功能的教程

<?xml version="1.0" encoding="utf-8"?>
 <layer-list xmlns:android="http://schemas.android.com/apk/res/android">
  <item android:id="@+android:id/background"
  android:drawable="@drawable/star1"></item> <span></span>    
    <item android:id="@+android:id/secondaryProgress"
    android:drawable="@drawable/star1"></item>
    <item android:id="@+android:id/progress"
  android:drawable="@drawable/star2"></item>
</layer-list>

<?xml version="1.0" encoding="utf-8"?>
<resources>
 <style name="roomRatingBar" parent="@android:style/Widget.RatingBar">
  <item name="android:progressDrawable">@drawable/room_rating_bar</item>
  <item name="android:minHeight">16dp</item>
  <item name="android:maxHeight">16dp</item>
 </style>
</resources>

<RatingBar
  android:id="@+id/room_ratingbar"
  style="@style/roomRatingBar"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:numStars="5"
  android:rating="4"
  android:layout_marginLeft="10dp" >
</RatingBar> 

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
 xmlns:tools="http://schemas.android.com/tools" 
 android:layout_width="match_parent" 
 android:layout_height="match_parent" 
 android:paddingBottom="@dimen/activity_vertical_margin" 
 android:paddingLeft="@dimen/activity_horizontal_margin" 
 android:paddingRight="@dimen/activity_horizontal_margin" 
 android:paddingTop="@dimen/activity_vertical_margin" 
 tools:context=".MainActivity" > 
  
 <SeekBar 
  android:id="@+id/seekBar1" 
  android:layout_width="match_parent" 
  android:layout_height="wrap_content" 
  /> 
 <RatingBar 
  android:id="@+id/ratingbar1" 
  android:layout_height="wrap_content" 
  android:layout_width="wrap_content" 
  android:layout_below="@id/seekBar1" 
  android:numStars="4" 
  android:stepSize="0.5" 
  /> 
 <Button 
  android:id="@+id/button1" 
  android:layout_height="wrap_content" 
  android:layout_width="match_parent" 
  android:layout_below="@id/ratingbar1" 
  android:text="增加RatingBar的星数"/> 
 
</RelativeLayout> 

package com.android.xiong.seekbars; 
 
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.RatingBar.OnRatingBarChangeListener; 
import android.widget.SeekBar; 
import android.widget.SeekBar.OnSeekBarChangeListener; 
 
public class MainActivity extends Activity { 
  
 private SeekBar seekBar1; 
 private RatingBar ratingBar1; 
 private Button button1; 
 
 @Override 
 protected void onCreate(Bundle savedInstanceState) { 
  super.onCreate(savedInstanceState); 
  setContentView(R.layout.activity_main); 
  seekBar1=(SeekBar)findViewById(R.id.seekBar1); 
  seekBar1.setMax(100); 
  seekBar1.setSecondaryProgress(20); 
  seekBar1.setProgress(10); 
  SeekBarChangeListener seek=new SeekBarChangeListener(); 
  seekBar1.setOnSeekBarChangeListener(seek); 
   
  ratingBar1=(RatingBar)findViewById(R.id.ratingbar1); 
  //设置RatingBar5颗星 
  ratingBar1.setNumStars(4); 
  //设置当前的星数 
  ratingBar1.setRating(1.0f); 
  //设置RatingBar 评分的步长 
  ratingBar1.setStepSize(0.5f); 
  RatingBarChangeLister rat=new RatingBarChangeLister(); 
  ratingBar1.setOnRatingBarChangeListener(rat); 
   
  button1=(Button)findViewById(R.id.button1); 
  BuutonClick bu=new BuutonClick(); 
  button1.setOnClickListener(bu); 
   
 } 
 
 class SeekBarChangeListener implements OnSeekBarChangeListener { 
 
  /** 
   * seekBar 当前触发的SeekBar控件 
   * progress 当前的进度 
   * fromUser 是否是用户触发 用户触发为true 否则为false 
   */ 
  @Override 
  public void onProgressChanged(SeekBar seekBar, int progress, 
    boolean fromUser) { 
   // TODO Auto-generated method stub 
   System.out.println("progress:"+progress+" fromUser:"+fromUser); 
    
  } 
  //此方法表示 开始拖动时触发的方法 
  @Override 
  public void onStartTrackingTouch(SeekBar seekBar) { 
   // TODO Auto-generated method stub 
   System.out.println(seekBar.getProgress()); 
    
  } 
   
  //拖动停止时触发的方法 
  @Override 
  public void onStopTrackingTouch(SeekBar seekBar) { 
   // TODO Auto-generated method stub 
   System.out.println(seekBar.getProgress()); 
  } 
   
 } 
  
 class RatingBarChangeLister implements OnRatingBarChangeListener{ 
  /** 
   * rattingBar当前触发的RatingBar控件 
   * rating 当前的星数 
   * fromUser 是否是用户触发 
   */ 
 
  @Override 
  public void onRatingChanged(RatingBar ratingBar, float rating, 
    boolean fromUser) { 
   // TODO Auto-generated method stub 
    
   System.out.println("rating:"+ rating +" fromUser:"+fromUser); 
    
  } 
   
 } 
  
 class BuutonClick implements OnClickListener{ 
 
  @Override 
  public void onClick(View arg0) { 
   // TODO Auto-generated method stub 
   ratingBar1.setRating(ratingBar1.getRating()+0.5f); 
    
  } 
   
 } 
 @Override 
 public boolean onCreateOptionsMenu(Menu menu) { 
  // Inflate the menu; this adds items to the action bar if it is present. 
  getMenuInflater().inflate(R.menu.main, menu); 
  return true; 
 } 
 
}