Android: Changing color of window background when using FLAG_SECURE

Question

I have a request that when the my Android application is placed into the background that I blank out the screen to hide sensitive data. This was easy enough to implement us

Answer 1

I'm able to change color of window background to "black" when using FLAG_SECURE through AppTheme in styles.xml file via changing theme like this:

It can be customizable to any color but I need black, so if you need custom color make further investigation.