使用MediaPlayer间隔播放一组音频文件

                    

         这里是从assets目录或网络中读取一组音频文件，然后以一定间隔时间按顺序播放一遍。

public class PlayMusic implements OnCompletionListener {
	private MediaPlayer player = new MediaPlayer();
	private int playIndex = -1;
	private String[] playList = null;
	private int time = 0;

	public void mediaPlayer(String[] soundUrl, int interval) {
		if (player != null)
			player.reset();
		else
			player = new MediaPlayer();
		playList = soundUrl;
		playIndex = -1;
		time = interval;
		player.setOnCompletionListener(this);
		playNext();
	}

	private OnPreparedListener preparedListener = new OnPreparedListener() {
		@Override
		public void onPrepared(MediaPlayer mp) {
			if (player != null)
				player.start();
		}
	};

	private void playNext() {
		playIndex++;
		if (!(playIndex >= 0 && playIndex < playList.length))
			return;

		String soundFileName = playList[playIndex];

		try {
			player.reset();
			//从Asset目录中读取音频
			// AssetFileDescriptor afd = MainActivity.mainContext.getAssets().openFd(soundFileName);
			// player.setDataSource(afd.getFileDescriptor(),afd.getStartOffset(),afd.getLength());
			//从网络上读取音频
			Uri uri = Uri.parse(soundFileName);
			player.setDataSource(MainActivity.mainContext, uri);
			player.setLooping(false);
			player.prepareAsync();
			player.setOnPreparedListener(preparedListener);

		} catch (IllegalArgumentException e1) {
			e1.printStackTrace();
		} catch (IllegalStateException e1) {
			e1.printStackTrace();
		} catch (SecurityException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

	@Override
	public void onCompletion(MediaPlayer mp) {
		Timer timer = new Timer();
		timer.schedule(new TimerTask() {
			@Override
			public void run() {
				playNext();
			}
		}, time);
	}

}