文章原创，转载请注明出处:http://blog.csdn.net/feifei454498130/article/details/9306631

设计如下:

 Service的代码如下，通过Binder去控制播放。监听来电没写，在Service里监听就行了。

public class MediaService extends Service {

    static final int PLAY_LIST[] = {
        R.raw.bigben
    };
    
    private MediaPlayer mediaPlayer;
    private HashSet<OnMediaChangeListener> listeners;
    
    private MediaBinder mBinder;
    
    @Override
    public void onCreate() {
        super.onCreate();
        
        listeners = new HashSet<OnMediaChangeListener>();
        mBinder = new MediaBinder();
    }
    
    @Override
    public void onDestroy() {
        super.onDestroy();
        listeners.clear();
        try {
            mediaPlayer.stop();
        } catch(Exception e) {
            e.printStackTrace();
        }
    }

    @Override
    public IBinder onBind(Intent intent) {
        return mBinder;
    }

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        if(intent != null && intent.getAction() != null) {
            Intent i = new Intent(intent.getAction());
            sendBroadcast(i);
        }
        return super.onStartCommand(intent, flags, startId);
    }
    
    private void notifyAllPlay() {
        Iterator<OnMediaChangeListener> iterator = listeners.iterator();
        while(iterator.hasNext()) {
            iterator.next().onMediaPlay();
        }
    }
    
    private void notifyAllPause() {
        Iterator<OnMediaChangeListener> iterator = listeners.iterator();
        while(iterator.hasNext()) {
            iterator.next().onMediaPause();
        }
    }
    
    private void notifyAllStop() {
        Iterator<OnMediaChangeListener> iterator = listeners.iterator();
        while(iterator.hasNext()) {
            iterator.next().onMediaStop();
        }
    }
    
    private void notifyAllCompletion() {
        Iterator<OnMediaChangeListener> iterator = listeners.iterator();
        while(iterator.hasNext()) {
            iterator.next().onMediaCompletion();
        }
    }
    
    MediaPlayer.OnCompletionListener mOnCompletionListener = new MediaPlayer.OnCompletionListener() {
        @Override
        public void onCompletion(MediaPlayer mp) {
            notifyAllCompletion();
        }
    };
    
    public class MediaBinder extends Binder {
        public void addOnMediaChangeListener(OnMediaChangeListener listener) {
            if(listener != null) {
                listeners.add(listener);
            }
        }
        
        public void removeOnMediaChangeListener (OnMediaChangeListener listener) {
            if(listener != null) {
                listeners.remove(listener);
            }
        }
        
        public void play() {
            if(mediaPlayer == null) {
                mediaPlayer = MediaPlayer.create(MediaService.this, PLAY_LIST[0]);
                mediaPlayer.setOnCompletionListener(mOnCompletionListener);
            }
            mediaPlayer.start();
            notifyAllPlay();
        }
        
        public void pause() {
            if(mediaPlayer != null) {
                mediaPlayer.pause();
            }
            notifyAllPause();
        }
        
        public void stop() {
            if(mediaPlayer != null) {
                mediaPlayer.stop();
                mediaPlayer = null;
            }
            notifyAllStop();
        }
        
        public boolean isPlaying() {
            if(mediaPlayer != null) {
                return mediaPlayer.isPlaying();
            }
            return false;
        }
        
        public int getDuration() {
            if(mediaPlayer != null) {
                return mediaPlayer.getDuration();
            }
            return -1;
        }
        
        public int getCurrentPosition() {
            if(mediaPlayer != null) {
                return mediaPlayer.getCurrentPosition();
            }
            return -1;
        }
        
        public void seek(int sec) {
            if(mediaPlayer != null) {
                try {
                    mediaPlayer.seekTo(sec);
                } catch(Exception e) {
                    e.printStackTrace();
                }
            }
        }
    }
}

源码下载地址:http://download.csdn.net/detail/feifei454498130/5740835