amm_sdk_sample/res/drawable/btn_style_alert_dialog_cancel.xml

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