How to limit the render area in an Activity?

Question

Android

Good afternoon!
I can not find a clear and concise answer to my question. I didn’t go deep into the nuances of programming for Android, but googling a bunch of examples did not give an answer.
Essence: there is an activity on which something is drawn. I want to split this activity into two independent areas. What to read on this topic? Which way to look?

Answer 1

https://startandroid.ru/ru/uroki/vse-uroki-spiskom...