ChristopherME

import android.content.ContentUris
import android.content.Context
import android.database.Cursor
import android.net.Uri
import android.os.Build
import android.os.Environment
import android.provider.DocumentsContract
import android.provider.MediaStore
import android.util.Log
import java.io.*

ChristopherME

class SomeViewModel(private val getUserUseCase: GetUserUseCase) : ViewModel() {
  
  // Only your viewmodel should update the value.
   private val _userName: MutableLiveData<String> = MutableLiveData()
   val userName: LiveData<String>
     get() = _userName
  
  ...
  
  private fun executeUseCase() {

ChristopherME

class SomeViewModel(private val getUserUseCase: GetUserUseCase) : ViewModel() {
  
  // Only your viewmodel should update the value.
   private val _user: MutableLiveData<User> = MutableLiveData()
   val userName: LiveData<String> = _user.map {
     resultUser -> "${resultUser.name} + ${resultUser.lastName}" 
   }
  
  ...
  

ChristopherME

class SomeViewModel(
  private val getUsersUseCase: GetUserUseCase,
  private val mapper: PresentationMapper
) : ViewModel() {
  
  // Only your viewmodel should update the value.
   private val _users: MutableLiveData<List<PresentationUser>> = MutableLiveData()
   val users: LiveData<List<PresentationUser>>
    get() = _users
  

ChristopherME

class SomeViewModel(
  private val getUsersUseCase: GetUserUseCase,
  private val mapper: PresentationMapper
) : ViewModel() {
  
  // Only your viewmodel should update the value.
   private val _domainUsers: MutableLiveData<List<DomainUser>> = MutableLiveData()
   val users: LiveData<List<PresentationUser>> = _domainUsers.switchMap { domainUsers ->
     liveData {
       emit(mapper.mapDomainUsersToPresentation(domainUsers))

ChristopherME

/**
 * Extension function for the fragment to handle the activity backPressed().
 * Call this inside [Fragment.onAttach] method.
 *
 * @param backPressed is invoked when the activity triggers onBackPressed().
 * @see [https://developer.android.com/reference/androidx/activity/OnBackPressedDispatcher]
 */
inline fun Fragment.handleActivityBackPressed(
    crossinline backPressed: () -> Unit
) {

ChristopherME

/**
 * Set the adapter and call [clearReference] extension function in one call.
 * Use this extension if the current Fragment is going to be REPLACED. (When using fragmentTransaction.add is not necessary) the back stack.
 */
fun <VH : RecyclerView.ViewHolder> RecyclerView.setNullableAdapter(
    adapter: RecyclerView.Adapter<VH>
) {
    this.adapter = adapter
    this.clearReference()

ChristopherME

/**
 * Represents the state to render the UI in MovieListFragment.
 *
 * @param isLoading if true we have to show a progress bar, else hide the progress bar.
 * @param movies this list will be submited into recyclerview adapter.
 * @param error OneTimeEvent that wraps a failure object for display a Toast, Snackbar, etc only once.
 */
data class MovieListUiState(
    val isLoading: Boolean = false,
    val movies: List<MovieUi> = emptyList(),

ChristopherME

class MovieListFragment : Fragment(R.layout.fragment_movie_list) {

    ...

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)
        initView()
        collectUiState()
    }

ChristopherME

/*
 * This would be your remote data source implementation. Only the [ActorsRemoteDataSource] is injected in your repository implementation.
 */
internal class ActorsRemoteDataSourceImpl(
    private val middlewareProvider: MiddlewareProvider,
    private val ioDispatcher: CoroutineDispatcher,
    private val errorAdapter: JsonAdapter<ResponseError>,
    private val actorsService: ActorsService
) : ActorsRemoteDataSource {