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：

LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT, 0);

    params.weight = 8;

    D.setLayoutParams(params);

还有ListView.LayoutParams