A black and white screen on your phone may be due to a few things. You should try turning off some features like Wind Down mode, Dark mode, and Power saving mode so your screen can go back to normal.
Hi Carlos:
I ran your application on a Samsung phone 10e with OS 10 and UI 2.5 and I have the display in color as it is supposed to be, see sccreenshot. Please see screenshot. Please check the link that @roumei gave you in post 5. Hopefully, @roumei 's advice leads you to your solution.
A black and white screen on your phone may be due to a few things. You should try turning off some features like Wind Down mode, Dark mode, and Power saving mode so your screen can go back to normal.
Now that you have your issue resolved, the least you can do and as a good gesture is to thank all the members who spent a lot of time trying to help you or at least the one who resolved it for you, After all, the problem had nothing to do with B4A or CSBuilder.