android.widget.FrameLayout$LayoutParams cannot be cast to android.widget.LinearLayout$LayoutParams

java.lang.ClassCastException: android.widget.FrameLayout$LayoutParams cannot be cast to android.widg

时间 2013-09-23 22:36:41  傲慢的上校的专栏原文  http://blog.csdn.net/lilu_leo/article/details/11952717

         有时候需要在在代码中设置LayoutParams，自己为一个FrameLayout设置LayoutParams的时候，遇上如题问题，

          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：

LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT, 0);   params.weight = 8;   D.setLayoutParams(params);

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