State Management in Flutter: From setState to ChangeNotifier, DI with provider and the Official Architecture Guide
Flutter's official architecture guide recommends View, ViewModel, Repository and Service layers for app state, unidirectional data flow, and dependency injection with provider. We build Bookstore's cart with a ChangeNotifier-based CartViewModel, Commands and a sealed Result, show with real test output how Selector cuts an unneeded rebuild on a price change, and compare the approach with Riverpod, Bloc and signals.
15 Nov 2026
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10 min
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6
