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我正在尝试使用 hilt 来注入存储库类的实现（接口存在于domain模块中，模块中的实现data与data模块取决于domain一个）但在构建应用程序时收到错误。这是我的设置

在domain模块中

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

在data模块中

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
}

和 data 将域声明为依赖项

编辑：我收到的错误：

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]
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1 回答 1

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合理的解释

看来你的Scopes.

你是Installing你RatesRepository的FragmentComponent，但你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注入RatesRepository，ViewModels并且与butViewModels 无关FragmentComponentActivityRetainedComponent。

见这张图： 组件层次结构

解决方案

我希望 aRepository应该在App范围内维护，因此我会将您的设置修改为：

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

如果依赖项的RatesRepositoryImpl范围更窄，您可以尝试ActivityRetainedComponent代替ApplicationComponent.

于 2020-08-28T09:04:27.080 回答