Android的MediaPlayer—1

最新推荐文章于 2024-09-21 14:43:01 发布

iteye_12952

最新推荐文章于 2024-09-21 14:43:01 发布

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分类专栏： andriod 文章标签： Android的MediaPlayer

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本文详细介绍了视频播放器的实现过程，包括播放器组件的初始化、视频资源的加载与播放、进度条的更新、缓冲状态的监听及异常处理等关键环节。通过优化播放器的性能和用户体验，确保了视频播放的流畅性和稳定性。

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public class PlayerVideo implements OnBufferingUpdateListener,OnCompletionListener,OnPreparedListener,Callback
{

private int videoWidth,videoHeight;

private SeekBar skbProgress; //进度条

public MediaPlayer mediaPlayer; //播放器

private SurfaceHolder surfaceHolder;

private Timer mTimer = new Timer();

public PlayerVideo(SurfaceView surfaceView,SeekBar skbProgress)
{
this.skbProgress = skbProgress;
this.surfaceHolder = surfaceView.getHolder();
this.surfaceHolder.addCallback(this);
this.surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
this.mTimer.schedule(mTimerTask, 0, 1000);
}

private TimerTask mTimerTask = new TimerTask()
{
@Override
public void run()
{
if (null == mediaPlayer)
{
return;
}

if (mediaPlayer.isPlaying() && skbProgress.isPressed() == false)
{
handleProgress.sendEmptyMessage(0);
}
}
};

private Handler handleProgress = new Handler()
{
public void handleMessage(Message msg)
{
int position = mediaPlayer.getCurrentPosition();
int duration = mediaPlayer.getDuration();

if (duration > 0)
{
long pos = skbProgress.getMax() * position / duration;
skbProgress.setProgress((int) pos);
}
};
};
public void play()
{
this.mediaPlayer.start();
}

public void playUrl(String videoUrl)
{
try
{
this.mediaPlayer.reset();
this.mediaPlayer.setDataSource(videoUrl);
this.mediaPlayer.prepare();//prepare之后自动播放
}
catch (Exception e)
{
e.printStackTrace();
}
}

public void pause()
{
if (null != this.mediaPlayer)
{
if (this.mediaPlayer.isPlaying())
{
this.mediaPlayer.pause();
}
else
{
this.mediaPlayer.start();
}
}
}

public void stop()
{
if (null != this.mediaPlayer)
{
this.mediaPlayer.stop();
this.mediaPlayer.release();
this.mediaPlayer = null;
}
}

public void onBufferingUpdate(MediaPlayer mp, int bufferingProgress)
{
this.skbProgress.setSecondaryProgress(bufferingProgress);
int currentProgress = this.skbProgress.getMax() * this.mediaPlayer.getCurrentPosition() / this.mediaPlayer.getDuration();
Log.e(currentProgress+"% play", bufferingProgress + "% buffer");
}
public void onCompletion(MediaPlayer mp)
{
}
public void onPrepared(MediaPlayer mp)
{
this.videoWidth = this.mediaPlayer.getVideoWidth();
this.videoHeight = this.mediaPlayer.getVideoHeight();

//频是android播放器不能播放的，不能播放时videoHeight=0，videoWidth=0，以此来判断是否播放视频
if (this.videoWidth != 0 && this.videoHeight != 0)
{
mp.start();
}
}

public void surfaceChanged(SurfaceHolder holder, int format, int width,int height)
{
}

public void surfaceCreated(SurfaceHolder holder)
{
this.mediaPlayer = new MediaPlayer();
this.mediaPlayer.setDisplay(this.surfaceHolder);
this.mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
this.mediaPlayer.setOnBufferingUpdateListener(this);
this.mediaPlayer.setOnPreparedListener(this);
}

public void surfaceDestroyed(SurfaceHolder holder)
{
}
}