Android 背景音乐播放

 1 public class AudioService extends Service implements
 2         MediaPlayer.OnCompletionListener {
 3     // 实例化MediaPlayer对象
 4     MediaPlayer player;
 5     private final IBinder binder = new AudioBinder();
 6 
 7     @Override
 8     public IBinder onBind(Intent intent) {
 9         return binder;
10     }
11 
12     public void onCreate() {
13         super.onCreate();
14         // 从raw文件夹中获取一个应用自带的mp3文件
15         player = MediaPlayer.create(this, R.raw.qq);
16         player.setOnCompletionListener(this);
17         player.setLooping(true);
18     }
19 
20     @Override
21     public int onStartCommand(Intent intent, int flags, int startId) {
22         super.onStartCommand(intent, flags, startId);
23         if (!player.isPlaying()) {
24             new MusicPlayThread().start();
25         }
26         else player.isPlaying();
27         return START_STICKY;
28     }
29 
30     
31     /**
32      * 当Audio播放完的时候触发该动作
33      */
34     public void onCompletion(MediaPlayer mp) {
35         stopSelf();// 结束了，则结束Service
36     }
37 
38     public void onDestroy() {
39         super.onDestroy();
40         if (player.isPlaying()) {
41             player.stop();
42         }
43         player.release();
44     }
45 
46     // 为了和Activity交互，我们需要定义一个Binder对象
47     public class AudioBinder extends Binder {
48         // 返回Service对象
49         public AudioService getService() {
50             return AudioService.this;
51         }
52     }
53 
54     private class MusicPlayThread extends Thread {
55         public void run() {
56             if (!player.isPlaying()) {
57                 player.start();
58             }
59         }
60     }
61    
62 }