A good software architecture allows the system to be easy to understand, to develop, to maintain and to implement.
The most important principle to follow is separation of concerns. It's a common mistake to write all your code in an Activity or a Fragment. These UI-based classes should only contain logic that handles UI and operating system interactions. By keeping these classes as lean as possible, you can avoid many lifecycle-related problems.

Together with you at a lecture, we will consider:

Introduction to Architecture as meaning

History
What problems we have in app development
Architecture matters
Solutions

Main principles

Create app (maybe our own app for fundamentals) which violates good architecture
Introduce SOLID (A brief overview)
Introduce KISS, DRY, YAGNI (Optional)
Fix app with those principles

Clean Architecture overview

Explain main points

History and author of approach
Basic principles
Mention original structure and linear structure

Layers and dependencies (how dependency go from one layer to another)

Layers and Dependency Rule
Transfer to linear structure
Description about layers and entities
Description of Domain layer (UseCase/Interactor, Entities)
Description of Data layer (Repository Impl, Gateaway)
Description of Presentation layer (Presenter/ViewModel, UI)

Start rework app to separate on layers and introduce it one by one by putting all logic in different classes and ui logic leave in ui
Introduce MVVM as a relationship between UI and logic
New business requirement
Develop new requirement
Show design code, how to include it into current architecture

BTW, we create a telegram chat for the discussions!

See you soon!

Android Academy team.

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[Android Advanced] Topic #2 - Architecture

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