Flutter Chapter 14 of 16

App Architecture

Organise a growing Flutter app: folder structure, layers, MVVM with repositories, dependency injection and environment configuration.

A small app can live in a few files. As it grows, structure decides whether adding a feature takes an hour or a week. This chapter describes an architecture that is widely used and matches the Flutter team’s own recommendations.

Lessons in this chapter

1. Flutter App Architecture: Layers and Folder StructureStructure a Flutter app with clear layers and a feature-first folder layout: UI, logic and data, and the rules for what depends on what.
2. MVVM and the Repository Pattern in FlutterBuild a Flutter feature with MVVM: a model, a service, a repository with caching, a ChangeNotifier view model and a view, with tests.
3. Dependency Injection and Environment Configuration in FlutterWire up a Flutter app with dependency injection using constructors, provider or get_it, and manage dev and production settings safely.