在Hilt中注入来自另一个Gradle模块的实现

Question

interface RatesRepository {
    fun getRates(): Single<Rates>
}

class RatesRepositoryImpl @Inject constructor(
    private val rateDataSource: CurrencyExchangeDataSource,
    private val mapper: ExchangeResponseToRates
) : RatesRepository {
//..
}

@Module
@InstallIn(FragmentComponent::class)
interface DataModule {
    @Binds
    fun bindsRatesRepository(ratesRepositoryImpl: RatesRepositoryImpl): RatesRepository
}

error: [Dagger/MissingBinding] com.basil.domain_converter.repository.RatesRepository cannot be provided without an @Provides-annotated method.
  public abstract static class ApplicationC implements CurrenciesApp_GeneratedInjector,
                         ^
      com.basil.domain_converter.repository.RatesRepository is injected at
          com.basil.domain_converter.usecase.GetRatesUseCase(ratesRepository)
      javax.inject.Provider<com.basil.domain_converter.usecase.GetRatesUseCase> is injected at
          com.basil.ui_converter.ui.RatesViewModel_AssistedFactory(getRatesUseCase)
      com.basil.ui_converter.ui.RatesViewModel_AssistedFactory is injected at
          com.basil.ui_converter.ui.RatesViewModel_HiltModule.bind(arg0)
      java.util.Map<java.lang.String,javax.inject.Provider<androidx.hilt.lifecycle.ViewModelAssistedFactory<? extends androidx.lifecycle.ViewModel>>> is injected at
          androidx.hilt.lifecycle.ViewModelFactoryModules.ActivityModule.provideFactory(…, viewModelFactories)
      @dagger.hilt.android.internal.lifecycle.DefaultActivityViewModelFactory java.util.Set<androidx.lifecycle.ViewModelProvider.Factory> is requested at
          dagger.hilt.android.internal.lifecycle.DefaultViewModelFactories.ActivityEntryPoint.getActivityViewModelFactory() [com.basil.example.CurrenciesApp_HiltComponents.ApplicationC → com.basil.example.CurrenciesApp_HiltComponents.ActivityRetainedC → com.basil.example.CurrenciesApp_HiltComponents.ActivityC]
  The following other entry points also depend on it:
      dagger.hilt.android.internal.lifecycle.DefaultViewModelFactories.FragmentEntryPoint.getFragmentViewModelFactory() [com.basil.example.CurrenciesApp_HiltComponents.ApplicationC → com.basil.example.CurrenciesApp_HiltComponents.ActivityRetainedC → com.basil.example.CurrenciesApp_HiltComponents.ActivityC → com.basil.example.CurrenciesApp_HiltComponents.FragmentC]

Answer 1

看来您的作用域有问题。

您正在在FragmentComponent中安装RatesRepository,但您试图在更高级别的依赖项中使用它。我可以看到您正在尝试在ViewModels中注入RatesRepository，而ViewModels与FragmentComponent无关，而是与ActivityRetainedComponent有关。

我希望存储库应该在app作用域中维护，因此我将修改您的设置以：

@Module
@InstallIn(ApplicationComponent::class)
interface DataModule {
    @Binds
    fun bindsRatesRepository(ratesRepositoryImpl: RatesRepositoryImpl): RatesRepository
}