<android.support.v7.widget.GridLayout xmlns:android="http://schemas.android.com/apk/res/android"
	xmlns:app="http://schemas.android.com/apk/res/com.commonsware.android.gridlayout"
	android:layout_width="fill_parent"
	android:layout_height="fill_parent"
	app:columnCount="1">

	<Button
		app:layout_column="0"
		app:layout_row="0"
		android:text="@string/button"/>

	<Button
		app:layout_column="0"
		app:layout_row="1"
		android:text="@string/button"/>

</android.support.v7.widget.GridLayout>