Modern Android development has evolved from UI-Centric patterns to MVC, MVP, MVVM, and finally MVI. Early Android apps often had tightly coupled logic within activities, commonly referred to as 'God Activities.' MVC improved this by separating the controller, although it still had strong coupling issues. MVP introduced a view interface, reducing direct coupling and improving testability. MVVM further decouples UI and logic using lifecycle-aware ViewModels with reactive data streams, while MVI ensures unidirectional data flow, making state management predictable and scalable, especially with Jetpack Compose.
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