samples/wearable/Flashlight/Wearable/src/main/res/layout/main.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.view.ViewPager
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/pager"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#000"
    android:keepScreenOn="true"
    />