launch_background.xml

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
    <item>
        <bitmap android:gravity="fill" android:src="@drawable/background"/>
    </item>
    <item>
        <bitmap android:gravity="center" android:src="@drawable/splash"/>
    </item>
</layer-list>