Android在Service里播放与控制音乐

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