该代码在Java中完美地工作,但在Kotlin中有未定义的问题

问题:



AppComponent

@Singleton
@Component(modules = arrayOf(NavigationModule::class))
interface AppComponent {

    fun inject(mainActivity: MainActivity)
    fun inject(fragmentOne: FragmentOne)
    fun inject(fragmentTwo: FragmentTwo)

}

导航模块
@Module
class NavigationModule {

    private val firstLevelNavigation: Cicerone<Router> = Cicerone.create()
    private val secondLevelNavigation: Cicerone<Router> = Cicerone.create()

    @Provides
    @Singleton
    @Named(Navigation.ROUTER_FIRST_LEVEL)
    fun provideFirstLevelRouter(): Router = firstLevelNavigation.router

    @Provides
    @Singleton
    @Named(Navigation.ROUTER_SECOND_LEVEL)
    fun provideSecondLevelRouter(): Router = secondLevelNavigation.router

    @Provides
    @Singleton
    @Named(Navigation.NAV_HOLDER_FIRST_LEVEL)
    fun provideFirstLevelNavigatorHolder(): NavigatorHolder = firstLevelNavigation.navigatorHolder


    @Provides
    @Singleton
    @Named(Navigation.NAV_HOLDER_SECOND_LEVEL)
    fun provideSecondLevelNavigationHolder(): NavigatorHolder = secondLevelNavigation.navigatorHolder

}

LearingApp
class LearningApp : Application() {

    companion object {

        lateinit var appComponent: AppComponent

    }

    override fun onCreate() {
        super.onCreate()
        appComponent = DaggerAppComponent
            .builder()
            .build()
    }

}

MainActivity
class MainActivity : AppCompatActivity() {

    @Inject
    @Named(Navigation.ROUTER_FIRST_LEVEL)
    lateinit var mRouter: Router

    @Inject
    @Named(Navigation.NAV_HOLDER_FIRST_LEVEL)
    lateinit var mNavigatorHolder: NavigatorHolder

    private lateinit var mNavigator:Navigator

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        LearningApp.appComponent.inject(this)

        mNavigator = SupportAppNavigator(this, R.id.main_container)

        mRouter.newRootScreen(Screens.FragmentOneScreen())

    }

    override fun onResume() {
        super.onResume()
        mNavigatorHolder.setNavigator(mNavigator)
    }

    override fun onPause() {
        mNavigatorHolder.removeNavigator()
        super.onPause()
    }

}

最佳答案

就像一个非常聪明的人曾经说过的:You need to target the annotation at the field by using @field:Named.

关于android - Dagger 2,Cicerone, Kotlin -注入(inject)问题,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/56567317/

10-11 22:29
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