android layout wrap_content,android-如果高度为WRAP_CONTENT,则不显示VideoVi...

我的应用程序内部有一个videoview,这是一个小videoview,不是全屏.

这样做,我得到了不可见的videoView：

mVideo.setLayoutParams(new LinearLayout.LayoutParams(200, LinearLayout.LayoutParams.WRAP_CONTENT));

mVideo.setOnPreparedListener(new OnPreparedListener() {

@Override

public void onPrepared(MediaPlayer mp) {

mVideo.setLayoutParams(new LinearLayout.LayoutParams(getIntWidth(), LinearLayout.LayoutParams.WRAP_CONTENT));

}

});

这样做,我得到了一个完全可见的videoView：

mVideo.setLayoutParams(new LinearLayout.LayoutParams(200, 1));

mVideo.setOnPreparedListener(new OnPreparedListener() {

@Override

public void onPrepared(MediaPlayer mp) {

mVideo.setLayoutParams(new LinearLayout.LayoutParams(getIntWidth(), LinearLayout.LayoutParams.WRAP_CONTENT));

}

});

为什么我必须在videoview的初始高度中放入1像素的高度？

谢谢