</item>

</style>

In addition, styles.xml defines a normal theme
to be applied to FlutterActivity after the launch
screen is gone. The normal theme background only shows
for a very brief moment after the splash screen disappears,
and during orientation change and Activity restoration.
Therefore, it’s recommended that the normal theme use a
solid background color that looks similar to the primary
background color of the Flutter UI.

<style

name=

"NormalTheme"

parent=

"@android:style/Theme.Black.NoTitleBar"

<item

name=

"android:windowBackground"

>@drawable/normal_background

</item>

</style>

Set up the FlutterActivity in AndroidManifest.xml