ref: https://stackoverflow.com/questions/44384491/how-to-remove-white-screen-after-splash-screen-in-react-native-for-android/56803562#56803562
<resources>
<style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
<item name="android:windowDisablePreview">true</item> // <--- ADD THIS
// Other items...
</style>
</resources>