Android.widget.framelayout$layoutparams cannot is cast to Android.widget.linearlayout$layoutparams

http://blog.csdn.net/lilu_leo/article/details/11952717

Sometimes you need to set layoutparams in the code, you set the Layoutparams for a framelayout, encounter title problems,

Java.lang.ClassCastException:android.widget.FrameLayout$LayoutParams cannot is cast to Android.widget.LinearLayout$LayoutParams 

Framelayout's parent control is a LinearLayout control, and the problem is that when LinearLayout allocates space for a child control, The layoutparams of the framelayout must be linearlayout.layoutparams, not framelayout.layoutparams.

Simply give a chestnut to illustrate: the outermost has relativelayout a, which has two linearlayout B, C, and B has a framelayout D. If you want to set B's layoutparams,b in the code, Layoutparams is relativelayout.layoutparams.

New Relativelayout.layoutparams (Layoutparams.match_parent, layoutparams.match_parent);     b.setlayoutparams (params); 

and d to set it, you need:

0);      8;  D.setlayoutparams (params);  

This problem can be solved. Or some of their basic knowledge is not strong, write this.

Android.widget.framelayout$layoutparams cannot is cast to Android.widget.linearlayout$layoutparams