  (       	          @              '   7   G   R   \         

state_focused state_window_focused 

state_enabled 

state_pressed drawable android **http://schemas.android.com/apk/res/android item selector                         $                    L                                      
            t                                                       8            `                                               8            `                                           6            `                                               6            L                                   2                                  