Modern Android App Architecture with Clean Code Principles 2025 Edition

Strap in, because we’re about to blast through the “latest and greatest” Android architectures, yank out the cruft, and show you how to ship maintainable, testable apps without losing your mind — or your team. This is 2025; if you’re still juggling Activities like it’s 2010, you’re in the wrong decade.

🏗️ 1. The Layered Architecture Reboot

Forget the Frankenstein monster of mashed-up patterns you cobbled together last year. A modern Android app needs three solid layers:

Presentation (UI) Layer

• Jetpack Compose + Kotlin: You’re not in 2015. Compose gives you declarative UI that compiles down to lean bytecode.
• ViewModels Only Where Needed: No god-tier MainViewModel that does everything. One ViewModel per screen (or per feature graph if you’re using Compose Navigation).

Domain Layer

• Use Cases / Interactors: One per business operation. FetchUserProfile, SubmitOrder, SyncOfflineData. No spaghetti of if-else blocks in your ViewModel.