媒体播放器的进度条

1，在XML中添加布局：SeekBar

2，获得媒体播放器的最大值，给sb赋最大值

int duration = mediaPlayer.getDuration();
sb.setMax(duration);

3，创建定时器，每隔一秒跟新一次控件

//定时器
TimerTask timerTask = new TimerTask() {
    @Override
    public void run() {
        int currentPosition = mediaPlayer.getCurrentPosition();
        sb.setProgress(currentPosition);
        //拖动点的监听
        sb.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
            @Override
            public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) {
                //拖动时
                if (fromUser) {
                    if (mediaPlayer != null) {
                        //媒体播放器播放拖动点位置的视图
                        mediaPlayer.seekTo(progress);
                    }
                }
            }

            @Override
            public void onStartTrackingTouch(SeekBar seekBar) {

            }

            @Override
            public void onStopTrackingTouch(SeekBar seekBar) {

            }
        });
    }
};
timer.schedule(timerTask,1000,1000);

4，关闭时要用生命周期关闭定时器和媒体播放器

@Override
protected void onPause() {
    mediaPlayer.stop();
    mediaPlayer.release();
    mediaPlayer = null;

    timer.cancel();
    super.onPause();
}