视频播放：MediaPlayer+SurfaceView(双缓冲)

/**     * 播放视频的方法     */    private void play() {        mp_video = new MediaPlayer();        AssetFileDescriptor afd = getResources().openRawResourceFd(R.raw.por);        try {            // 设置视频源            mp_video.setDataSource(afd.getFileDescriptor(),                    afd.getStartOffset(), afd.getLength());            mp_video.setLooping(true);//设置循环            mp_video.setDisplay(sv_video.getHolder());            mp_video.prepareAsync();//异步            mp_video.setOnPreparedListener(this);        } catch (Exception e) {            e.printStackTrace();        }    }