android-architecture

Structuring an Android app with Clean Architecture and Hilt involves defining presentation, domain, and data layers with inward dependencies, then organizing them into a multi-module layout with separate core and feature modules to ensure testability and scalable dependency management.

Setting up Hilt dependency injection across multiple Android modules requires applying @HiltAndroidApp at the app level, annotating UI components with @AndroidEntryPoint, and using @HiltViewModel to wire dependencies cleanly across modularized core and feature modules.

You need to modularize your Android project when maintainability declines and build times increase, allowing you to split codebases into core model, data, domain, UI, and feature modules to enforce inward dependencies and reduce coupling.

Clean Architecture works for Android projects of varying sizes by adapting its modularization strategy, allowing small apps to start with basic UI, domain, and data layers before scaling up to a full multi-module layout.

Dependencies should point inward in Android Clean Architecture to ensure the domain layer containing business logic remains decoupled from the UI and data layers, enabling independent testing and scalable module organization.