samples/browseable/BatchStepSensor/res/drawable/card_overlay_focused.xml - platform/development - Git at Google

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

 <shape xmlns:android="http://schemas.android.com/apk/res/android"
        android:shape="rectangle">
     <stroke
         android:width="5dp"
         android:color="#aa99CC00"/>
 </shape>
	<?xml version="1.0" encoding="utf-8"?>

	<shape xmlns:android="http://schemas.android.com/apk/res/android"
	android:shape="rectangle">
	<stroke
	android:width="5dp"
	android:color="#aa99CC00"/>
	</shape>