android 在线视频播放器实现方法

public class VideoActivity extends Activity {
private static final String TAG = "VideoActivity";
private EditText filenameText;
private SurfaceView surfaceView;
private MediaPlayer mediaPlayer;

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
ButtonClickListener listener = new ButtonClickListener();

ImageButton playButton = (ImageButton) this.findViewById(R.id.play);
playButton.setOnClickListener(listener);

ImageButton pauseButton = (ImageButton) this.findViewById(R.id.pause);
pauseButton.setOnClickListener(listener);

ImageButton resetButton = (ImageButton) this.findViewById(R.id.reset);
resetButton.setOnClickListener(listener);

ImageButton stopButton = (ImageButton) this.findViewById(R.id.stop);
stopButton.setOnClickListener(listener);

// 重点这个地方需要设置回调函数  继承Callback 类实现三个方法
surfaceView.getHolder().addCallback(new myCallback());
filenameText = (EditText) this.findViewById(R.id.filename);
surfaceView = (SurfaceView) findViewById(R.id.surfaceView);
surfaceView.getHolder() .setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
// 设置这个大小
surfaceView.getHolder().setFixedSize(176, 144);
mediaPlayer = new MediaPlayer();
}

private class myCallback implements android.view.SurfaceHolder.Callback {

@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width,
int height) {
// TODO Auto-generated method stub
}

@Override
public void surfaceCreated(SurfaceHolder holder) {
// TODO Auto-generated method stub

}

@Override
public void surfaceDestroyed(SurfaceHolder holder) {
// TODO Auto-generated method stub
}
}

// 当来电话的时候需要停掉播放业务
@Override
protected void onPause() {
if (mediaPlayer.isPlaying())
mediaPlayer.pause();
super.onPause();
}

@Override
protected void onResume() {
if (mediaPlayer.isPlaying())
mediaPlayer.pause();
super.onResume();
}

@Override
protected void onDestroy() {
if (mediaPlayer.isPlaying())
mediaPlayer.stop();
// 注意这个地方是释放
mediaPlayer.release();
super.onStop();
}

private class ButtonClickListener implements View.OnClickListener {
@Override
public void onClick(View v) {
try {
String filename = filenameText.getText().toString();
switch (v.getId()) {
case R.id.play:
// 得到文件名称 重点代码
String filenames = filenameText.getText().toString();
// 第一步对给对象进行重设
mediaPlayer.reset();
// 设置流的类型 关键代码
mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
// 设置数据来源
mediaPlayer.setDataSource("/sdcard/" + filenames);
// 设置需要播放的视频
// 把视频输出到显示控件上 重点代码
mediaPlayer.setDisplay(surfaceView.getHolder());
// 播放时前需要缓冲一下
mediaPlayer.prepare();
mediaPlayer.start();
break;
case R.id.pause:
if (mediaPlayer.isPlaying()) {
mediaPlayer.pause();
} else {
mediaPlayer.start();
}
break;

case R.id.reset:
if (!mediaPlayer.isPlaying()) {
mediaPlayer.start();
}
// 跳回到起始的地方重新播放
mediaPlayer.seekTo(0);
break;
case R.id.stop:
if (mediaPlayer.isPlaying()) {
mediaPlayer.stop();
}
break;
}
} catch (Exception e) {
Log.e(TAG, e.toString());
}
}
}
}