wear/src/androidTest/res/layout/box_inset_layout_testcase_1.xml

<?xml version="1.0" encoding="utf-8"?>
<android.support.wear.widget.BoxInsetLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:id="@+id/box">

    <FrameLayout
        android:id="@+id/child1"
        app:boxedEdges="bottom|right"
        android:layout_width="match_parent"
        android:layout_height="match_parent">
        <TextView
            android:id="@+id/content1"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:gravity="bottom|right"
            android:text="Test Case 1"/>
    </FrameLayout>

</android.support.wear.widget.BoxInsetLayout>