Android ListView 中子控件无法获取焦点的解决方法(主要针对键盘操作)

 

 
1。android:descendantFocusability
   一般情况下为了使用ListView的onItemClick，onItemLongClick方法，屏蔽子控件对焦点的获取，所以应将该值由
blocksDescendants 改为 afterDescendants
 
ps：
android:descendantFocusability
Defines the relationship between the ViewGroup and its descendants when looking for a View to take focus.
Must be one of the following constant values.
Constant Value Description
beforeDescendants   0 The ViewGroup will get focus before any of its descendants.
afterDescendants   1 The ViewGroup will get focus only if none of its descendants want it.
blocksDescendants   2 The ViewGroup will block its descendants from receiving focus
 
2.在×××Adapter类的getView中调用子控件的setFocusable属性，及实现相应的Click函数（由于子控件获取焦点后，listview的onItemClick，onItemLongClick不再会被调用，
所以也一并实现，对于onItemLongClick函数，注意要返回TRUE,否则会发现该函数相应的代码会走两遍，估计是ListView的onItemLongClick被触发，有待深究）。
 
3.调用ListView的setItemsCanFocus（TRUE）函数