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/