android - @Inject lateinit 属性尚未初始化 Dagger2

Question

我尝试在我的项目中使用 Dagger2。我有一个 Firebase 服务和一个名为 SyncFactory 的类，它发出一个特定的请求。当我接到 Firebase 的电话时，我提出了我的请求。我创建了一个经理模块

@Module(includes = [RepositoryModule::class, NetworkModule::class, AppModule::class])
class ManagersModule {
...
    @Singleton
    @Provides
    fun provideSyncFactory(context: Context, accountsRepository: AccountsRepository, messagesRepository: MessagesRepository) : SyncFactory {
        return SyncFactory(context, accountsRepository, messagesRepository)
    }
...

}

SyncFactory 类如下所示

class SyncFactory @Inject constructor(
    private val context: Context,
    private val accountsRepository: AccountsRepository,
    private val messagesRepository: MessagesRepository
) {

fun getAccounts(){....}

我也有一个界面

@Singleton
@Component(modules = [ViewModelsModule::class, DatabaseModule::class, RepositoryModule::class, AppModule::class, NetworkModule::class, ManagersModule::class])
interface ViewModelComponent {
    fun inject(viewModels: ViewModels)

    fun inject(firebaseService: AppFirebase)
}

最后在我的 firebase 服务中，我注入了 SyncFactory

class AppFirebase : FirebaseMessagingService(), SyncFactoryCallback {

    @Inject
    lateinit var syncFactory: SyncFactory


override fun onMessageReceived(message: RemoteMessage) {
    super.onMessageReceived(message)

    // lateinit property syncFactory has not been initialized
    syncFactory.getAccounts()

}

当我的服务被调用时，我得到一个 lateinit 属性 syncFactory has not been initialized 异常。我做错了什么..？

Answer 1

解决方案是在您的 Application 类中实现 HasServiceInjector

class MyApplication : Application(), HasServiceInjector {

    @Inject
    lateinit var dispatchingAndroidInjector: DispatchingAndroidInjector<Service>


    companion object {
        private lateinit var instance: MyApplication

    }


    override fun serviceInjector(): AndroidInjector<Service> {
        return dispatchingAndroidInjector
    }
}