XML FILE

<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="de.fhflensburg.manichja.barrier51.GameActivity">

    <de.fhflensburg.manichja.barrier51.GameView
        android:id="@+id/gameView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        />

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@id/gameView"
        />
</RelativeLayout>