<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:orientation="vertical" android:layout_width="fill_parent"
  android:layout_height="fill_parent">
  
  <FrameLayout android:id="@+id/contentFrame" android:layout_width="fill_parent"
    android:layout_height="wrap_content" android:layout_weight="1" />

  <LinearLayout android:layout_width="fill_parent"
    android:layout_height="wrap_content" android:layout_gravity="bottom"
    android:layout_alignParentBottom="true" android:orientation="vertical"
    android:id="@+id/bottom_controls">
    <Button android:id="@+id/unlockButton" android:layout_gravity="bottom"
      android:layout_width="fill_parent" android:layout_height="wrap_content"
      android:text="Exit" />
  </LinearLayout>
  
</RelativeLayout>