una-mobile-app/android/app/src/main/res/drawable/splashscreen.xml

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">

    <item android:drawable="@color/splashprimary" />
    <item>
        <bitmap
                android:gravity="center"
                android:src="@drawable/splash_image" />
    </item>

</layer-list>