<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item 
        android:state_pressed="true"
        android:state_focused="false"
        android:drawable="@drawable/button_update_pressed" 
    />

    <item 
        android:state_pressed="false"
        android:state_focused="true"
        android:drawable="@drawable/button_update_selected" 
    />

    <item 
        android:state_pressed="false"
        android:state_focused="false"
        android:drawable="@drawable/button_update_normal" 
    />
 </selector>