selector setting

http://developer.android.com/guide/topics/resources/color-list-resource.html

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android" >
    <item
        android:color="hex_color"
        android:state_pressed=["true" | "false"]
        android:state_focused=["true" | "false"]
        android:state_selected=["true" | "false"]
        android:state_checkable=["true" | "false"]
        android:state_checked=["true" | "false"]
        android:state_enabled=["true" | "false"]
        android:state_window_focused=["true" | "false"] />
</selector>

<?xml version="1.0" encoding="utf-8"?>

<selector xmlns:android="http://schemas.android.com/apk/res/android">   

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

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

<item android:drawable="@drawable/normal_image" />

</selector>