setNextMediaPlayer not working

问题

I am trying to find out how to use the android's MediaPlayer method setNextMediaPlayer which should smoothly transition from one player (song) to another. But do not know how to use the method since there is a lack of documentation.

This is what i do and it does not work:

final MediaPlayer mp1 = new MediaPlayer();
    final MediaPlayer mp2 = new MediaPlayer();

    try {
        mp1.setDataSource("http://song1.MP3");
        mp2.setDataSource("http://song2.mp3");


        mp1.prepareAsync();

        mp1.setOnPreparedListener(new OnPreparedListener() {

            @Override
            public void onPrepared(MediaPlayer mp) {
                mp1.start();
            }
        });


        mp1.setNextMediaPlayer(mp2);

        mp1.setOnCompletionListener(new OnCompletionListener() {

            @Override
            public void onCompletion(MediaPlayer mp) {
                mp2.prepareAsync();
                mp2.setOnPreparedListener(new OnPreparedListener() {

                    @Override
                    public void onPrepared(MediaPlayer mp) {
                        mp2.start();
                    }
                });


            }
        });

    } catch (IllegalArgumentException e) {}

So the first song plays. But after it finishes the second does not start.

回答1:

Got it to work.

mp1.setDataSource(song1);

        mp1.prepareAsync();

        mp1.setOnPreparedListener(new OnPreparedListener() {

            @Override
            public void onPrepared(MediaPlayer mp) {
                mp1.start();
            }
        });
        //mp1.start();
        //mp1.seekTo(1000*100);

        mp2.setDataSource(song2);
        mp2.prepare();

        mp1.setNextMediaPlayer(mp2);

The only problem is that the second mediaplayer cannot be called as async (i.e. mp2.prepareAsync()). I do not know why, but if you try it like that it does not start, which is a bad thing :/.

回答2:

MediaPlayer setNextMediaPlayer gives a lot of problem what i do is this: in the onCompletion() reset() the mediaplayer, setDataSource() and prepareAsync().

Something like this

        mp1.setDataSource("http://song1.MP3");
        mp1.prepareAsync();
        mp1.setOnPreparedListener(new MediaPlayer.OnPreparedListener() {
            @Override
            public void onPrepared(MediaPlayer mp) {
                mp1.start();
            }
        });
        mp1.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
            @Override
            public void onCompletion(MediaPlayer mp) {
                mp1.reset();
                //ADD FLAG FOR STOP
                try {
                    mp1.setDataSource("http://song2.mp3");
                } catch (IOException e) {
                    e.printStackTrace();
                }
                mp1.prepareAsync();
            }
        });

Then in the onCompletion you need some flag to check if the last song was played to stop, because the code as i posted will loop in the last song.

来源：https://stackoverflow.com/questions/30918930/setnextmediaplayer-not-working

标签

android

android-mediaplayer