Flutter App Architecture and Best Practices

This article outlines the architectural approach for building a Flutter application using Clean Architecture, SOLID principles, and Riverpod for state management. We take the example of a Crypto Watch-list feature to illustrate the implementation. Additionally, we address key non-functional requirements (NFRs) as best practices to ensure a robust, scalable, and maintainable application.

Part 1: Clean Architecture with Riverpod for the Crypto Watchlist Feature

Overview

The Crypto Watchlist feature allows users to view a list of cryptocurrencies, track their prices, and add/remove coins to their watchlist. The implementation adheres to Clean Architecture and SOLID principles, leveraging Riverpod for state management to ensure separation of concerns, testability, and scalability.

Clean Architecture Layers

Clean Architecture divides the application into three primary layers:

1. Presentation Layer: Contains the UI (Flutter widgets) and state management logic (Riverpod providers). It interacts with the domain layer via use cases.
2. Domain Layer: The core business logic, including entities and use cases. It is independent of frameworks and external systems.