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Android Multimodule Architecture Concepts is a showcase of two MVVM multi-modular concepts (Android Layered Architecture andAndroid Clean Architecture) 🏛 to developing clean, testable and scalable Android Apps 📱

🔎 The architecture proposed consist of 3 different layers:

• Presentation layer: contains all the Android UI framework components (e.g. Activities, Fragments, ViewModels...) and the related resources (e.g. images, strings...).
• Domain layer: contains the platform-independent business logic and models.
• Data layer: contains the repositories, the data sources api implementations and the corresponding api-specific models.

These layers are implemented using 3 separate modules to increase decoupling and separation of concerns. The dependencies between the modules are set so that thedata layer is completely invisible to thepresentation layer and vice versa.

The project hosts each architecture concept in a separate branch (thismain branch only contains an empty template).

🔎 The proposed concepts are:

• Layered Architecture Concept: the dependency between the modules ispresentation ->domain ->data. The 3 modules are Android modules. The visibility among the modules is shown by the picture below:

• Clean Architecture Concept: the dependency between the modules ispresentation ->domain <-data. Thepresentation anddata modules are Android modules whereas thedomain module is a Kotlin library being the innermost platform-independent module. The visibility among the modules is shown by the picture below:

• Clean Architecture Compose Concept: branch of theClean Architecture Concept with the UI built with Jetpack Compose 🚀.

The App retrieves data from theCoinGecko API and shows the current most capitalized cryptocurrency (which of course is Bitcoin 😄).