What literature is worth reading for proper Android application structure design?

Question

Android

Hello!
A couple of days ago I received feedback on my implementation of a test task.
One of the points of criticism concerned the "lack of project structure". Intuitively, I guess that we are talking about the breakdown of classes into classes of models, classes responsible for network tasks, etc.
Tell me, please, am I right?
And what literature and / or resources could you recommend to a person who is persistently "marking" in Junior Android Dev.
Thank you in advance for your attention!

Answer 1

You can start with the classics:
Design patterns www.ozon.ru/context/detail/id/20217137

Answer 2

The book that was recommended for patterns is very good, but there is a more suitable book for your question :
www.ozon.ru/context/detail/id/24301926
the best book