我無法使用 Hilt 注入片段視圖模型

Question

我正在嘗試使用刀柄將視圖模型注入片段，為此我創建了兩個模塊，一個用於我的網絡組件，另一個用於角色視圖模型。

網絡模塊安裝在 SingletonComponent 中，我需要將字符模塊安裝在 FragmentComponent 中以通過“by viewmodels()”獲取 Viewmodel

我的活動和我的片段用“@AndroidEntryPoint”注釋，我的應用程序用“@HiltAndroidApp”注釋我的模塊是：

@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()
}

我的視圖模型是：

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

此外，當我在這兩種情況下都使用 SingletonComponent 時，應用程序運行良好，但是當嘗試使用 FragmentComponent 失敗時：

最后我的依賴是：

    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

正如它的名字所說，“FragmentComponent”（s）只存在於它的片段中。 您不能將片段范圍的內容注入到視圖 model 中，因為視圖模型的生命周期超過其片段生命周期。將“FragmentScoped”更改為“SingletonScoped”。

在使用范圍之前，請先閱讀官方文檔。 99% 的時間，使用“SingletonComponent”就足夠了