java.lang.ClassCastException: android.widget.RelativeLayout$LayoutParams cannot be cast to android.widget.AbsListView$LayoutParams
FrameLayout的父控件是一个LinearLayout控件,问题出在,LinearLayout为子控件分配空间的时候,获取FrameLayout的LayoutParams的必须为LinearLayout.LayoutParams,而非FrameLayout.LayoutParams。
简单的举个栗子说明一下:最外层有ReLativeLayout A,里面有两个LinearLayout B、C,而B中又有一个一个FrameLayout D。如果要在代码里设置B的LayoutParams,B的LayoutParams要为RelativeLayout.LayoutParams。
RelativeLayout.LayoutParams params = new RelativeLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT);
B.setLayoutParams(params);
而D要设置的话,需要:
params = new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT, 0);
params.weight = 8; D.setLayoutParams(params);
还有ListView.LayoutParams
本文转自wanqi博客园博客,原文链接:http://www.cnblogs.com/wanqieddy/p/4040601.html如需转载请自行联系原作者