samples/wearable/JumpingJack/Wearable/src/main/res/layout/counter_layout.xml

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

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/white">

    <TextView
        android:id="@+id/counter"
        android:layout_centerInParent="true"
        android:textSize="50sp"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

</RelativeLayout>