MediaPlayer使用

MediaPlayer有时没有回调OnCompletionListener,并报错：｀MediaPlayer finalized without being released｀

MediaPlayer mediaPlayer = MediaPlayer.create(mContext, rawId);
mediaPlayer.setOnCompletionListener(new MediaPlayer.OnCompletionListener() {
    @Override
    public void onCompletion(MediaPlayer mp) {
        mp.release();
    }
});
mediaPlayer.start();

原因：成员变量被gc回收了，导致没有回调成功（或者播放至一半就停了）。保持mediaPlayer引用，防止被改成回收

参考：http://stackoverflow.com/questions/15023037/garbage-collection-causes-mediaplayer-finalized-without-being-released