ListView中的Button事件及ListView Item焦点的冲突处理

android:descendantFocusability

定义父子控件之间获取焦点的关系   

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.  父控件优先获取
afterDescendants	1	The ViewGroup will get focus only if none of its descendants want it. 子控件优先获取
blocksDescendants	2	The ViewGroup will block its descendants from receiving focus. 屏蔽子控件获取控件

This corresponds to the global attribute resource symbol descendantFocusability.

       在ListView有Button等需要被点击的控件，如果不对相关属性进行设置，ListView的item点击事件将不能响应。ListView中的Button等控件需要每个Item都绑定一次，不然触发的时候会得不到想要的结果。

 解决的办法，在ListView的Item的xml文件中添加如下属性：

                1）添加android:descendantFocusability="blocksDescendants"

                2）Button添加属性android:focusable="false"和android:clickable="true"

这样设置后ListView和Item中的Button都具有Click的功能。

点击Button后Item变色 以此类推 这个还在研究中....