Two buttons showing when only creating one in XML

I am creating my layout entirely in XML. I wish to show a ListView and always have a button at the bottom of the screen like in the default FullScreenActivity. However, the issue is that the button that is at the bottom is also appearing at the top of the screen.

<RelativeLayout xmlns:android="http://ift.tt/nIICcg"
xmlns:tools="http://ift.tt/LrGmb4"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#ff000000"
tools:context=".ChannelNameActivity">

<ListView
    android:id="@+id/channelListView"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:keepScreenOn="true"
    android:layout_weight="1"/>

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_alignParentBottom="true"
    android:background="@color/black_overlay"
    android:orientation="horizontal"
    tools:ignore="UselessParent">

    <Button
        android:id="@+id/dummy_button"
        style="?metaButtonBarButtonStyle"
        android:layout_width="0dp"
        android:layout_weight="1"
        android:layout_height="wrap_content"
        android:text="@string/dummy_button" />

</LinearLayout>

</RelativeLayout>