当我按流时 MP3 不播放

Question

我正在尝试从流中播放 MP3，但问题是在我按播放后它会自动播放。此外，播放按钮不会播放音频，它只是将其设置为流式传输。如何让我的 MP3 自动播放？

    play.setOnClickListener(new View.OnClickListener() {
        public void onClick(View view) {
            if (!mediaPlayer.isPlaying()) {
                try {
                    mediaPlayer.setDataSource(url); 
                    mediaPlayer.prepareAsync(); 
                } catch (Exception e) {
                    e.printStackTrace();
                }

                mediaFileLengthInMilliseconds = mediaPlayer.getDuration();

                if(!mediaPlayer.isPlaying()){
                    mediaPlayer.start();
                    play.setImageResource(R.drawable.ic_media_pause);
                }else {
                    mediaPlayer.pause();
                    play.setImageResource(R.drawable.ic_media_play);
                }

                primarySeekBarProgressUpdater();
            }
    }});

    sb.setMax(99);
    sb.setOnTouchListener(this);

    mediaPlayer = new MediaPlayer();
    mediaPlayer.setOnBufferingUpdateListener(this);
    mediaPlayer.setOnCompletionListener(this);
}

private void primarySeekBarProgressUpdater() {
    sb.setProgress((int)(((float)mediaPlayer.getCurrentPosition()/mediaFileLengthInMilliseconds)*100));
    if (mediaPlayer.isPlaying()) {
        notification = new Runnable() {
            public void run() {
                primarySeekBarProgressUpdater();
            }
        };
        handler.postDelayed(notification,1000);
    }
}

public boolean onTouch(View v, MotionEvent event) {
    if(v.getId() == R.id.progress_bar){
        /** Seekbar onTouch event handler. Method which seeks MediaPlayer to seekBar primary progress position*/
        if(mediaPlayer.isPlaying()){
            SeekBar sb = (SeekBar)v;
            int playPositionInMillisecconds = (mediaFileLengthInMilliseconds / 100) * sb.getProgress();
            mediaPlayer.seekTo(playPositionInMillisecconds);
        }
    }
    return false;
}

public void onCompletion(MediaPlayer mp) {
    play.setImageResource(R.drawable.ic_media_play);

    mediaPlayer.stop();
}

public void onBufferingUpdate(MediaPlayer mp, int percent) {
    sb.setSecondaryProgress(percent);
}
   }

我做错了什么吗？我单击“播放”，看到搜索栏已满，但无法播放。

我也收到这样的消息：

E/MediaPlayer(28985): stop called in state 0 E/MediaPlayer(28985):
error (-38, 0) E/MediaPlayer(28985): Error (-38,0)
E/MediaPlayer(28985): stop called in state 0 E/MediaPlayer(28985):
error (-38, 0) E/MediaPlayer(28985): Error (-38,0)
E/MediaPlayer(28985): stop called in state 0 E/MediaPlayer(28985):
error (-38, 0) E/MediaPlayer(28985): Error (-38,0)
E/MediaPlayer(28985): stop called in state 0 E/MediaPlayer(28985):
error (-38, 0) E/MediaPlayer(28985): Error (-38,0)
E/MediaPlayer(28985): stop called in state 0 E/MediaPlayer(28985):
error (-38, 0) E/MediaPlayer(28985): Error (-38,0)
E/MediaPlayer(28985): stop called in state 0 E/MediaPlayer(28985):
error (-38, 0) E/MediaPlayer(28985): Error (-38,0)

Answer 1

看起来您需要实现MediaPlayer.OnPreparedListener。由于您使用的是 prepareAsync()，因此您需要等到 MediaPlayer 准备好后才能调用 start()。当您收到 onPrepared() 回调时，就可以安全地调用 start() 方法。