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How to structure layers in Clean Architecture for implementing an interface that interacts with API and displays a list of items?

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Answer from AI

In Clean Architecture, layers are separated by responsibility:

  • Entity — business models, for example, the Item class.
  • Use Cases — business logic, such as fetching a list of items from an API.
  • Interface Adapters — data transformation for UI, including Presenters and ViewModels.
  • Frameworks & Drivers — UI, network, implementation of API requests and display.

For an interface that interacts with an API and displays a list of items, the structure might be:

  1. Entity: Item model.
  2. Use Case: GetItemsUseCase class, which requests data from the repository.
  3. Repository Interface: defines methods for data retrieval.
  4. Data Layer: repository implementation that calls the API.
  5. Presentation Layer: ViewModel or Presenter that calls the Use Case and prepares data for UI.
  6. UI Layer: Activity/Fragment or Composable that displays the list.

An example of a simplified chain:

UI -> ViewModel -> GetItemsUseCase -> Repository -> API

This separation ensures the business logic is independent of API and UI implementation details.

How to structure layers in Clean Architecture for… - sobes.tech