BayernMessenger/app/src/main/res/values/themes.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>

    <style name="Theme.Riot" parent="Base.Theme.Riot">

    </style>

    <style name="Theme.Riot.Splash">
        <item name="android:windowBackground">@drawable/bg_splash</item>
    </style>


</resources>