<?xml version="1.0" encoding="utf-8"?>
<resources>
    <!-- GameActivity descends from AppCompatActivity and insists on an
         AppCompat theme. One black, same as every other cyb surface. -->
    <style name="Theme.Cyb" parent="Theme.AppCompat.NoActionBar">
        <item name="android:windowBackground">@android:color/black</item>
        <item name="android:statusBarColor">@android:color/black</item>
        <item name="android:navigationBarColor">@android:color/black</item>
        <item name="android:windowFullscreen">false</item>
    </style>
</resources>

Graph