How to stretch the game to full screen with a cutout?

Question

Adaptive design

I'm a beginner, so don't hit too hard I
made a simple application. Allowed only landscape orientation. But there was a problem. I just can’t stretch the game to full screen, which has a cutout for the front camera. There is a black line left. How to fix?
(On the screen of Huawei Mate 20)

Answer 1

https://developer.android.com/guide/topics/display...