A modern Android sample app built with Kotlin and Jetpack Compose.

This project demonstrates a clean architecture approach using MVVM, Coroutines, and Flow for state management.

Design System

This project uses Material Design 3 as the underlying design system, and all components follow the M3 guidelines.

Data Layer

The data layer is responsible for managing application data and serving it to upper layers in a consistent and reliable way. It abstracts the underlying data sources and provides a clean API for the rest of the app.

Local Data Sources

DataStore

This project uses DataStore to persist application preferences locally. Preferences are stored using the Protocol Buffers (proto) format, which provides:

• Type Safety through a strongly-typed schema.
• Better performance compared to key-value storage(legacy SharedPreferences).
• Smaller storage size.
• Forware/backward compatibility for future schema changes.

The configuration of proto is located in the gradle module named "data-proto".

Repositories

Repositories are responsible for delegating to different data sources and exposing data and operations to upper layers.

Testing

Unit Testing

This project demonstrates two common testing strategies:

1. Fake Implementations A fake DataStore implementation is used to simulate persistence.
2. Mockito Implementations Repository dependencies are mocked to verify interaction behavior.