app/src/main/res/layout/activity_2d_ui.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
    android:layout_height="match_parent" android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    android:paddingBottom="@dimen/activity_vertical_margin"
    tools:context="com.android.benchmark.UI2D">

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Tiles"
        android:id="@+id/button_ui_tiles" />

    <LinearLayout
        android:orientation="vertical"
        android:layout_width="match_parent"
        android:layout_height="match_parent"></LinearLayout>
</RelativeLayout>