Android如何确定Activity控件渲染完成

参考资料：http://www.jcodecraeer.com/a/anzhuokaifa/androidkaifa/2013/0304/963.html

@Override

public void onWindowFocusChanged(boolean hasFocus) {

 // TODO Auto-generated method stub

 super.onWindowFocusChanged(hasFocus);

 if(hasFocus){

  //showPopupWindow(getApplicationContext());

 }

}