我正在使用 android 中的 MediaPlayer 类创建视频播放器。我在 MediaPlayer.setDisplay() 中设置了一个 SurfaceHolder，它成功显示了视频，但是当此活动再次恢复时，没有显示视频。那么有什么问题呢？？
该代码是：
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
setContentView(R.layout.main);
player = new MediaPlayer();
surface = (SurfaceView)findViewById(R.id.surface);
surface.setOnClickListener(new OnClickListener()
{
@Override
public void onClick(View v)
{
VideoDemo.this.startActivity(new Intent(VideoDemo.this, AnotherActivity.class));//Video not displayed when return from this activity by pressing back button
}
});
holder = surface.getHolder();
holder.addCallback(this);
holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
try
{
String songName = Environment.getExternalStorageDirectory().toString()+File.separator+"1.mp4";
player.setDataSource(songName);
player.prepare();
player.start();
}
catch (Exception e)
{
e.printStackTrace();
}
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height)
{
player.setDisplay(holder);
}
@Override
public void surfaceCreated(SurfaceHolder holder)
{
Log.d(TAG, "surfaceCreated() is called ************ holder.getSurface() = "+holder.getSurface());
}
@Override
public void surfaceDestroyed(SurfaceHolder holder)
{
Log.d(TAG, "surfaceDestroyed() is called ************");
}