How can LiveData be implemented and used within the principles of Clean Architecture?

In Clean Architecture, LiveData is usually used at the Presentation (UI) level to observe data changes and update the interface. It is important to separate business logic and data from Android-specific components.

Implementation can look like this:

• UseCase (in the Domain layer) returns data via Flow or another reactive type.
• ViewModel (in the Presentation layer) subscribes to UseCase and converts Flow into LiveData.
• Activity or Fragment observes LiveData and updates UI.

Example of a ViewModel in Kotlin:

class MyViewModel(private val getDataUseCase: GetDataUseCase) : ViewModel() {
    val data: LiveData<List<Item>> = getDataUseCase()
        .asLiveData()
}

Thus, LiveData acts as an adapter between pure business logic and UI, maintaining separation of concerns.