samples/SupportLeanbackShowcase/app/src/main/res/drawable/wizard_background_blackned.xml - platform/development - Git at Google

 <?xml version="1.0" encoding="utf-8"?>
 <layer-list xmlns:android="http://schemas.android.com/apk/res/android">
     <item android:drawable="@drawable/background_canyon"></item>
     <item android:drawable="@drawable/overlay_black"></item>
 </layer-list>
	<?xml version="1.0" encoding="utf-8"?>
	<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
	<item android:drawable="@drawable/background_canyon"></item>
	<item android:drawable="@drawable/overlay_black"></item>
	</layer-list>