Share your experience creating multi-component applications involving network interaction.

In my experience creating multi-component Android applications with network interaction, I used MVVM or Clean Architecture to separate responsibilities among components. For example, UI components (Activity/Fragment) interact with ViewModel, which communicates with repositories to fetch data.

For network interaction, I used Retrofit or OkHttp to perform HTTP requests, and also employed coroutines or RxJava for asynchronous data processing. Caching and error handling were implemented at the repository level.

An example of simplified code with Retrofit and coroutines:

interface ApiService {
    @GET("users/{id}")
    suspend fun getUser(@Path("id") id: String): User
}

class UserRepository(private val api: ApiService) {
    suspend fun fetchUser(id: String): User {
        return api.getUser(id)
    }
}

class UserViewModel(private val repository: UserRepository) : ViewModel() {
    val userLiveData = MutableLiveData<User>()

    fun loadUser(id: String) {
        viewModelScope.launch {
            try {
                val user = repository.fetchUser(id)
                userLiveData.value = user
            } catch (e: Exception) {
                // error handling
            }
        }
    }
}