【BUG解决】Cannot add header view to list -- setAdapter has already been called.

今天在为ExpandableListView addHeaderView（加头view），运行报错：

Cannot add header view to list -- setAdapter has already been called.

?

提示我已经设置了适配器，原来addHeaderView（View v）方法 只能在父控件 setAdapter之前调用！

http://androiddada.iteye.com/

仔细想想也很容易解释，addHeaderView是为list加入 头视图，而setAdapter是为控件匹配内容。哪有先匹配了内容，再插入view的道理，皮之不存毛将焉附？?

?

?