How to write a multi-page application?

Question

Android

Hello. New to android ("don't make excuses").
It is necessary to make an application with a lower menu + each route can have tabs.
It turns out, as here
I came to the conclusion that the transition through the lower menu is a change in the activity and the menu itself is a separate layout. I think to do tabs through fragments.
I would be glad for any advice, recommendation or kick in the direction of the documentation, where you can read the best practice on this issue

Answer 1

In 2k18, you don’t need to do separate activities for this. It's better to do all navigation on fragments or controllers . Google MVP, MVI, MVVM, Clean Architecture. Choose what you like best.