AArkiwi/res/layout/vitamio_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
	android:orientation="vertical"
	android:keepScreenOn = "true" 
	android:layout_width="match_parent"
	android:layout_height="match_parent">
	<io.vov.vitamio.widget.VideoView 
	    android:id="@+id/surface_view"
		android:layout_width="match_parent" 
		android:layout_height="match_parent"
		android:layout_centerHorizontal="true" 
		android:layout_centerVertical="true" />
</RelativeLayout>