Coroutine Dispatcher in a HILT injection Environment

CoroutineDispatcherHelper.kt

class CoroutineDispatcherHelper : IDispatcher {

    override fun dispatcherIO(): CoroutineDispatcher = Dispatchers.IO

    override fun dispatcherMain(): CoroutineDispatcher = Dispatchers.Main

    override fun dispatcherDefault(): CoroutineDispatcher = Dispatchers.Default

}

DispatcherModule.kt

@Module
@InstallIn(SingletonComponent::class)
object CoroutineDispatcherModule {

    @Singleton
    @Provides
    fun provideCoroutineDispatcher(): CoroutineDispatcherHelper {
        return CoroutineDispatcherHelper()
    }
}

IDispatcher.kt

interface IDispatcher {
    fun dispatcherIO(): CoroutineDispatcher
    fun dispatcherMain(): CoroutineDispatcher
    fun dispatcherDefault(): CoroutineDispatcher
}

MainExtUtils.kt

fun <T> MutableLiveData<T>.launchItemInCoroutine(iDispatcher: CoroutineDispatcher, data: T) {
    CoroutineScope(iDispatcher).launch {
        postValue(data)
    }
}

fun <T> SingleLiveEvent<T>.launchItemInCoroutine(iDispatcher: CoroutineDispatcher, data: T) {
    CoroutineScope(iDispatcher).launch {
        postValue(data)
    }
}

fun <T> MutableSharedFlow<T>.launchItemInCoroutine(iDispatcher: CoroutineDispatcher, data: T) {
    CoroutineScope(iDispatcher).launch {
        emit(data)
    }
}

MainViewModel.kt

@HiltViewModel
class MainViewModel @Inject constructor(
    private val verificationUseCase: VerificationUseCase,
    private val dispatcherHelper: CoroutineDispatcherHelper,
) : ViewModel() {
  
  fun verifyAndChangePassword(changePassword: ChangePassword) {
        CoroutineScope(dispatcherHelper.dispatcherIO()).launch {
          //Implementation here in coroutine environment
        }
  }
}

You should launch coroutines with viewModelScope if you want to cancel the coroutine when MainViewModel is cleared/destroyed.

  fun verifyAndChangePassword(changePassword: ChangePassword) {
        viewModelScope.launch(dispatcherHelper.dispatcherIO()) {
          //Implementation here in coroutine environment
        }
  }