So, you have a Xamarin Forms app including Android.
How do you modify the theme? Where to start?
Lots of advice out there, but in some ways that makes it hard. Of course I am going to add to that malaise with this small tidd-bit:
Basically: even though it looks obvious you Don’t change it here:
You change it here:
This way will, in my opinion, save you much angst. You see, I got many errors trying to go the other way (even on a super simple base app) and also this gives you extensiblity in the future with it’s simple base template.
More about hemes in Xamarin can be found here:
https://docs.microsoft.com/en-us/xamarin/android/user-interface/material-theme