MVVM ViewModel Sample

mvvm_viewmodel_sample.kt

enum class LoadState {
    IDLE,
    LOADING,
    LOADED,
    ERROR
}

@HiltViewModel
class CityViewModel @Inject constructor(
    private val getCitiesInteractor: GetCitiesInteractor,
    private val navigator: Navigator,
) {

    private val _loadState = MutableLiveData<LoadState>(LoadState.IDLE)
    val loadState: LiveData<LoadState>
        get() = _loadState
    private val _cityList = MutableLiveData<List<CityResultModel>>()
    val cityList: LiveData<List<CityResultModel>>
        get() = _cityList
    private val _errorMessage = MutableLiveData<CharSequence>()
    val errorMessage: LiveData<CharSequence>
        get() = errorMessage

    // implementation follows
}