hostage/res/drawable/panel_bg_selector.xml

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

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

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

	<item android:drawable="@drawable/panel_bg" />
</selector>