Semi.Avalonia/demo/Semi.Avalonia.Demo.Android/Resources/values/styles.xml

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

  <style name="MyTheme">
  </style>

  <style name="MyTheme.NoActionBar" parent="@style/Theme.AppCompat.DayNight.NoActionBar">
    <item name="android:windowActionBar">false</item>
    <item name="android:windowBackground">@drawable/splash_screen</item>
    <item name="android:windowNoTitle">true</item>
  </style>
</resources>