surfaceView视频播放

import android.app.Activity;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.media.MediaPlayer.OnBufferingUpdateListener;
import android.media.MediaPlayer.OnCompletionListener;
import android.os.Bundle;
import android.util.DisplayMetrics;
import android.util.Log;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup.LayoutParams;
import android.widget.LinearLayout;

public class Activity01 extends Activity implements OnBufferingUpdateListener,
OnCompletionListener, MediaPlayer.OnPreparedListener,
SurfaceHolder.Callback
{
private static final String TAG = "Activity01";
private int mVideoWidth;
private int mVideoHeight;
private MediaPlayer mMediaPlayer;

private SurfaceHolder holder;
private String path;

private LinearLayout content;

public void onCreate(Bundle icicle)
{
super.onCreate(icicle);
setContentView(R.layout.main);
content = (LinearLayout) findViewById(R.id.content);
loadData();

findViewById(R.id.button1).setOnClickListener(new OnClickListener()
{
@Override
public void onClick(View v)
{
Log.d(TAG, "播放");
// play
playVideo();
}
});
findViewById(R.id.button2).setOnClickListener(new OnClickListener()
{

@Override
public void onClick(View v)
{
Log.d(TAG, "停止");
// stop
if (mMediaPlayer != null)
{
//                    mMediaPlayer.stop();
mMediaPlayer.reset();
}
}
});
}

private void loadData()
{
SurfaceView mPreview = new SurfaceView(this);
content.addView(mPreview, new LinearLayout.LayoutParams(
LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));

/* 设置媒体文件路径 */
path = "/sdcard/test.mp4";
/* 构建MediaPlayer对象 */
mMediaPlayer = new MediaPlayer();
mMediaPlayer.setOnBufferingUpdateListener(this);
mMediaPlayer.setOnCompletionListener(this);
mMediaPlayer.setOnPreparedListener(this);
mMediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);

/* 得到SurfaceHolder对象 */
holder = mPreview.getHolder();
/* 设置回调函数 */
holder.addCallback(this);
/* 设置风格 */
holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
}

private void playVideo()
{
Log.d(TAG, "playVideo:");
try
{
mMediaPlayer.setDataSource(path);
/* 准备 */
mMediaPlayer.prepare();
/* 设置事件监听 */
}
catch (Exception e)
{
Log.e(TAG, "error: " + e.getMessage(), e);
}
}

public void onBufferingUpdate(MediaPlayer arg0, int percent)
{
Log.d(TAG, "onBufferingUpdate percent:" + percent);
}

public void onCompletion(MediaPlayer arg0)
{
Log.d(TAG, "onCompletion called");
}

public void onPrepared(MediaPlayer mediaplayer)
{
Log.d(TAG, "onPrepared called");
mVideoWidth = mMediaPlayer.getVideoWidth();
mVideoHeight = mMediaPlayer.getVideoHeight();
DisplayMetrics metric = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(metric);
mVideoWidth = metric.widthPixels;
mVideoHeight = metric.heightPixels;
if (mVideoWidth != 0 && mVideoHeight != 0)
{
/* 设置视频的宽度和高度 */
holder.setFixedSize(mVideoWidth, mVideoHeight);
/* 开始播放 */
mMediaPlayer.start();
}

}

/* 更改时出发的事件 */
public void surfaceChanged(SurfaceHolder surfaceholder, int i, int j, int k)
{
Log.d(TAG, "surfaceChanged called");

}

/* 销毁 */
public void surfaceDestroyed(SurfaceHolder surfaceholder)
{
Log.d(TAG, "surfaceDestroyed called");
if (mMediaPlayer != null)
{
mMediaPlayer.release();
mMediaPlayer = null;
}

}

/* 当SurfaceHolder创建时触发 */
public void surfaceCreated(SurfaceHolder holder)
{
Log.d(TAG, "surfaceCreated called");
/* 设置通过SurfaceView来显示画面 */
mMediaPlayer.setDisplay(holder);
playVideo();
}

/* 销毁 */
@Override
protected void onDestroy()
{
super.onDestroy();
if (mMediaPlayer != null)
{
mMediaPlayer.release();
mMediaPlayer = null;
}

}
}