samples/VirtualDeviceManager/client/res/drawable/focus_frame.xml - platform/development - Git at Google

 <shape xmlns:android="http://schemas.android.com/apk/res/android"
     android:shape="rectangle">
     <solid android:color="@android:color/transparent" />
     <stroke
         android:width="5dp"
         android:color="@android:color/holo_blue_light" />
 </shape>
	<shape xmlns:android="http://schemas.android.com/apk/res/android"
	android:shape="rectangle">
	<solid android:color="@android:color/transparent" />
	<stroke
	android:width="5dp"
	android:color="@android:color/holo_blue_light" />
	</shape>