samples/ApiDemos/res/layout/videoview.xml

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    >
    
    <VideoView 
        android:id="@+id/surface_view" 
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_gravity="center"
    />
    
</FrameLayout>