我无法使用希尔特注入片段视图模型

Question

我试图使用hilt将viewmodel注入片段，为此我创建了两个模块，一个用于我的网络组件，另一个用于角色的viewmodel。

网络模块安装在单例组件中，我需要将字符模块安装在FragmentComponent中，以通过“by view模型（）”获取视图模型

我的活动和片段用“@AndroidEntryPoint”注释，我的应用程序用“@HiltAndroidApp”注释。我的模块是：

@Module
@InstallIn(SingletonComponent::class)
class NetworkModule {

    @Singleton
    @Provides
    fun provideLoggingInterceptor(): HttpLoggingInterceptor {
        val loggingInterceptor = HttpLoggingInterceptor()
        loggingInterceptor.level = HttpLoggingInterceptor.Level.BODY
        return loggingInterceptor
    }

    @Singleton
    @Provides
    fun provideAuthorizationInterceptor(): AuthorizationInterceptor =
        AuthorizationInterceptor()

    @Singleton
    @Provides
    fun provideInterceptors(
        loggingInterceptor: HttpLoggingInterceptor,
        authorizationInterceptor: AuthorizationInterceptor
    ): HttpInterceptors = HttpInterceptors(
        listOf(
            loggingInterceptor,
            authorizationInterceptor
        )
    )

    @Singleton
    @Provides
    fun provideTimeouts(): HttpTimeouts = HttpTimeouts()

    @Singleton
    @Provides
    fun provideHttpClient(
        timeouts: HttpTimeouts,
        interceptors: HttpInterceptors
    ): HttpBuilderFactory = HttpClientBuilderFactory(timeouts, interceptors)

    @Singleton
    @Provides
    fun provideGsonConverter(): GsonFactory = GsonBuilderFactory()

    @Singleton
    @Provides
    fun provideHttpServiceProvider(
        httpBuilderFactory: HttpBuilderFactory,
        gsonFactory: GsonFactory
    ): HttpProvider = HttpServiceProvider(httpBuilderFactory, gsonFactory)
}

@Module
@InstallIn(FragmentComponent::class)
class CharacterListModule {

    @Singleton
    @Provides
    fun provideCharacterMapper(): Mapper<CharacterDataContainer, PaginatedCharacters> =
        PaginatedCharactersMapper()

    @Singleton
    @Provides
    fun provideCharacterServices(
        httpServiceProvider: HttpProvider
    ): CharacterServices = httpServiceProvider.createService(CharacterServices::class.java)

    @Singleton
    @Provides
    fun provideCharacterListRemoteSource(
        characterServices: CharacterServices,
        characterMapper: Mapper<CharacterDataContainer, PaginatedCharacters>
    ): CharacterListSource = CharacterListRemoteSourceImpl(
        characterServices,
        characterMapper
    )

    @Singleton
    @Provides
    fun provideCharacterListRepository(
        characterListRemoteSource: CharacterListSource
    ): CharacterListRepository = CharacterListRepositoryImpl(
        characterListRemoteSource
    )

    @Singleton
    @Provides
    fun provideCoroutineDispatcher() = Dispatchers.IO

    @Singleton
    @Provides
    fun provideCharacterListUseCase(
        coroutineDispatcher: CoroutineDispatcher,
        characterListRepository: CharacterListRepository
    ) = CharacterListUseCase(
        coroutineDispatcher,
        characterListRepository
    )

    @Singleton
    @Provides
    fun provideCharacterUIMapper(): Mapper<Character, CharacterUI> = CharacterUIMapper()
}

我的视图模型是：

@HiltViewModel
class CharacterListViewModel @Inject constructor(
    private val characterListUseCase: CharacterListUseCase,
    private val characterUIMapper: Mapper<Character, CharacterUI>
) : ViewModel() {

此外，当我在这两种情况下都使用SingletonComponent时，应用程序运行良好，但是当尝试使用FragmentComponent失败时：

最后我的依赖是：

    object Hilt {

        internal object Versions {
            const val hilt = "2.33-beta"
            const val hiltViewModel = "1.0.0-alpha01"
        }

        const val hilt = "com.google.dagger:hilt-android:${Versions.hilt}"
        const val hiltCompiler = "com.google.dagger:hilt-android-compiler:${Versions.hilt}"
        const val hiltViewModel = "androidx.hilt:hilt-lifecycle-viewmodel:${Versions.hiltViewModel}"
        const val hiltViewModelCompiler = "androidx.hilt:hilt-compiler:${Versions.hiltViewModel}"
    }

Answer 1

顾名思义，“FragmentComponent”（s）只有在碎片存在的时候才会存在。您不能将片段范围的内容注入视图模型，因为视图模型的生命周期超过了其片段生命周期。将“FragmentScoped”更改为“SingletonScoped”。

在使用示波器之前，请先阅读官方文档。99%的时候，使用“SingletonComponent”就足够了