android/testData/guiTests/LayoutTest/app/src/main/res/layout/layout1.xml

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

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <com.android.tools.tests.layout.MyButton
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:text="@string/test" />

</LinearLayout>