android oncreate获取宽高度

         gridView = (GridView) getView().findViewById(R.id.gridView_musicbook);

         gridView.getViewTreeObserver().addOnGlobalLayoutListener(
                 new OnGlobalLayoutListener() {
                     @Override
                     public void onGlobalLayout() {
                         // TODO Auto-generated method stub
                         mgridWidth = gridView.getWidth();//获取宽度//获取高度gridView.getHeight()

 // getViewTreeObserver().removeGlobalOnLayoutListener(this);  int itemWidth = mgridWidth / (songFiles.IMAGE_HEIGHT);  if (itemWidth > 0)   gridView.setNumColumns(itemWidth);   }  });

横竖屏切换时会重新跑oncreate事件，所以屏幕切换时会重新计算高度