amm_sdk_sample/res/drawable/mm_submenu.xml

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