The magic of Focusable property in Android--the implementation of the bottom button

Http://www.cnblogs.com/kofi1122/archive/2011/03/22/1991828.html

Http://www.juziku.com/weizhishi/3077.htm

Android Development: The role of the android:focusable attribute in view

Sets whether to get focus. If a requestfocus () is called, the latter is treated preferentially. Note that in the form you want to set a certain one, such as EditText get focus, the light setting this is not possible, you need to set this edittext front of the focusable to false only line. To get focus in touch mode, set Focusableintouchmode to True.