如果没有 @Provides 注释的方法，则无法提供 Hilt

Question

我有一个活动视图模型

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@HiltViewModel\nclass MainViewModel @Inject constructor(\nprivate val repository: UserRepository\n)     : ViewModel() {\n\n}\n

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存储库接口

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interface UserRepository {\nsuspend fun loginUser(username: String, password: String): Pair<Boolean, String>\n}\n

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用户数据源类如下

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internal class UserDataSource @Inject constructor(private val octaveApi: OctaveApi) :\nUserRepository {\n\noverride suspend fun loginUser(username: String, password: String): Pair<Boolean, String> {\n    return Pair(false, "unsucess")\n}\n}\n

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这是我的匕首实现

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@Module\n@InstallIn(SingletonComponent::class)\nabstract class ApiModule {\n\n  @Module\n  @InstallIn(SingletonComponent::class)\n  object Providers {\n\n    @Provides\n    @Singleton\n    internal fun provideOctaveApi(retrofit: Retrofit): OctaveApi =\n      retrofit.create(OctaveApi::class.java)\n  }\n}\n\n@Module\n@InstallIn(ActivityRetainedComponent::class)\nabstract class RetainedDataModule {\n\n  @Binds\n  internal abstract fun bindUserRepository(userDataSource: UserDataSource):     UserRepository\n}\n

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当我构建项目时，我收到此错误

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/OctaveDashboard/app/build/generated/source/kapt/stagingExternalDebug/com/octave/OctaveApplication_HiltComponents.java:125: error: [Dagger/MissingBinding] com.octave.data.user.UserRepository cannot be provided without an @Provides-annotated method.\n  public abstract static class SingletonC implements OctaveApplication_GeneratedInjector,\n                     ^\n  com.octave.data.user.UserRepository is injected at\n      com.octave.MainViewModel(cornersRepository)\n  com.octave.MainViewModel is injected at\n      com.octave.MainViewModel_HiltModules.BindsModule.binds(vm)\n  @dagger.hilt.android.internal.lifecycle.HiltViewModelMap java.util.Map<java.lang.String,javax.inject.Provider<androidx.lifecycle.ViewModel>> is requested at\n      dagger.hilt.android.internal.lifecycle.HiltViewModelFactory.ViewModelFactoriesEntryPoint.getHiltViewModelMap() [com.octave.OctaveApplication_HiltComponents.SingletonC \xe2\x86\x92 com.octave.OctaveApplication_HiltComponents.ActivityRetainedC \xe2\x86\x92 com.octave.OctaveApplication_HiltComponents.ViewModelC]\n

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似乎无法弄清楚是什么导致了这个问题。

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Answer 1

我的应用程序模块中缺少模块依赖项，这导致了此问题。能够通过包含它来修复。