Architecture Best Practice

Following these recommendations can improve code maintainability, enhance reusability, and make scaling the application easier.

1. Separate the Application into Two Main Layers: UI and Data

1.1 UI Layer

The UI layer is responsible for presenting the data and interactions to the user.

  • Screens: Represent different views in the app (e.g., Login, Profile).
  • Components: Reusable UI elements like buttons and loaders.
  • Responsive Design: Ensure adaptability across screen sizes.
  • Themes: Define consistent colors, fonts, and spacing.

1.2 Data Layer

The Data layer manages data retrieval, storage, and transformations, acting as a bridge between data sources and UI.

  • Repositories: Single source of truth for data, handling all retrieval and update logic.
  • Data Sources: Separate data sources for local and remote storage.
  • Models: Represent structured data for the app.

2. Dependency Injection (DI)

Dependency Injection decouples component dependencies, improving code modularity and testability.

  • Service Locator: Use a package like get_it for DI.
  • Code Generation with injectable: Automates DI setup.

3. Working with Singleton Scopes

Scoped Singletons allow components to persist temporarily, reducing memory usage by avoiding unnecessary instance creation.

  • Define scopes for specific app sections, like authentication or shopping cart.
  • Scoped singletons are automatically disposed of after they’re no longer required.

4. Lifecycle Awareness

Lifecycle Awareness ensures that resources are managed efficiently by cleaning up components when they’re no longer needed.

  • Use LifecycleOwner patterns to control ViewModel lifecycle and optimize memory usage.
  • Scoped ViewModels avoid creating multiple instances unnecessarily.

Summary of Best Practices

  • Organize the app into UI and Data Layers.
  • Implement Dependency Injection for Modularization.
  • Use Scoped Singletons for Memory Efficiency.
  • Adopt Lifecycle Awareness for Efficient Component Management.
  • Use Consistent State Management and Implement Testing.