android - 如何在android中通过通知播放音乐？

Question

我使用调用播放器服务的通知，该播放器应该播放音乐。但是我不知道怎么后台播放？

你可以看到我的代码如下:

1.首先文件调用播放器服务

Intent i=new Intent(this, PlayerService.class);

i.putExtra(PlayerService.EXTRA_PLAYLIST, "main");
i.putExtra(PlayerService.EXTRA_SHUFFLE, true);

startService(i);

2.第二个文件是播放音乐的类

public class PlayerService extends Service {
    public static final String EXTRA_PLAYLIST="EXTRA_PLAYLIST";
    public static final String EXTRA_SHUFFLE="EXTRA_SHUFFLE";
    private boolean isPlaying=false;

    @Override
    public int onStartCommand(Intent intent, int flags, int startId) {
        String playlist=intent.getStringExtra(EXTRA_PLAYLIST);
        boolean useShuffle=intent.getBooleanExtra(EXTRA_SHUFFLE, false);

        play(playlist, useShuffle);       
        return(START_NOT_STICKY);
    }

    @Override
    public void onDestroy() {
        stop();
    }

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

    private void play(String playlist, boolean useShuffle) {
        if (!isPlaying) {
            Log.w(getClass().getName(), "Got to play()!");
            isPlaying=true;

            Notification note=new Notification(R.drawable.stat_notify_chat, "Can you hear the music?", System.currentTimeMillis());
            Intent i=new Intent(this, FakePlayer.class);
            i.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP| Intent.FLAG_ACTIVITY_SINGLE_TOP);

            PendingIntent pi=PendingIntent.getActivity(this, 0,i, 0);

            note.setLatestEventInfo(this, "Fake Player","Now Playing: \"Ummmm, Nothing\"", pi);
            note.flags|=Notification.FLAG_NO_CLEAR;

            startForeground(1337, note);
        }
    }
    private void stop() {
        if (isPlaying) {
            Log.w(getClass().getName(), "Got to stop()!");
            isPlaying=false;
            stopForeground(true);
        }
    }
}

谢谢和问候，奥米德

Answer 1

可能您已经找到了答案，但也许它会对其他人有所帮助。即，通知类有 sound方法，需要在通知发生时要播放的文件的路径。参见 notification examples (特别是“添加声音”段落)以获取更多信息。