MVP演示者没有正确注入

我正在学习Kotlin和Dagger 2，试图将一些Mindorks高级MVP样本转换成Kotlin，但是我有Dagger2编译问题。 我在这里上课，但是非常接近！ 不要介意这个不整洁的东西，我打算在编译完成之后再梳理每个类。 如果有什么遗漏，请让我知道。 错误归结为我的演示者类未正确注入到活动中。 错误如下所示：

e: D:\_Dev\repo\app\build\tmp\kapt3\stubs\debug\com\xxx\di\component\ActivityComponent.java:8: error: com.xxx.login.LoginMVP.Presenter<com.xxx.login.LoginMVP.View,? extends com.xxx.login.LoginMVP.Interactor> cannot be provided without an @Provides- or @Produces-annotated method. e: e: public abstract void inject(@org.jetbrains.annotations.NotNull() e: ^ e: com.xxx.login.LoginMVP.Presenter<com.xxx.login.LoginMVP.View,? extends com.xxx.login.LoginMVP.Interactor> is injected at e: com.xxx.login.LoginActivity.presenter e: com.xxx.login.LoginActivity is injected at e: com.xxx.di.component.ActivityComponent.inject(activity) e: java.lang.IllegalStateException: failed to analyze: org.jetbrains.kotlin.kapt3.diagnostic.KaptError: Error while annotation processing 

编辑：

这是一个带有失败代码的回购 ，使用最新的安卓工作室Canary构建

BaseActivity.kt

 abstract class BaseActivity : AppCompatActivity(), MvpView { val activityComponent: ActivityComponent by lazy { DaggerActivityComponent.builder() .applicationComponent((application as App).applicationComponent) .activityModule(ActivityModule(this)) .build() } } 

BasePresenter.kt

 open class BasePresenter<V : MvpView, out I: MvpInteractor> @Inject constructor(private val mvpInteractor: I) : MvpPresenter<V, I> { private var mvpView: V? = null override fun onAttach(mvpView: V) { this.mvpView = mvpView } override fun onDetach() { mvpView = null } override fun getMvpView(): V? { return mvpView } override fun getInteractor(): I { return mvpInteractor } } 

MvpPresenter.kt（MvpView和MvpInteractor是基本的空接口）

 interface MvpPresenter<V: MvpView, out I: MvpInteractor> { fun onAttach(mvpView: V) fun onDetach() fun getMvpView(): V? fun getInteractor(): I } 

App.kt

 class App: Application() { lateinit var applicationComponent: ApplicationComponent override fun onCreate() { super.onCreate() applicationComponent = DaggerApplicationComponent.builder() .applicationModule(ApplicationModule(this)).build() applicationComponent.inject(this) } fun getComponent(): ApplicationComponent { return applicationComponent } fun setComponent(applicationComponent: ApplicationComponent) { this.applicationComponent = applicationComponent } } 

ApplicationComponent.kt

 @Singleton @Component(modules = arrayOf(ApplicationModule::class)) interface ApplicationComponent { fun inject(app: App) @ApplicationContext fun context(): Context fun application(): Application //Pref helper //Api helper } 

ApplicationModule.kt

 @Module class ApplicationModule(val application: Application) { @Provides @ApplicationContext fun provideContext(): Context = application @Provides fun provideApplication(): Application = application //Provide api helper //Provide pref helper //Provide api key etc. } 

ActivityModule.kt

 @Module class ActivityModule(val activity: AppCompatActivity) { @Provides fun provideContext(): Context = activity @Provides fun provideActivity(): AppCompatActivity = activity @Provides fun provideLoginPresenter(presenter: LoginPresenter<LoginMVP.View, LoginMVP.Interactor>): LoginMVP.Presenter<LoginMVP.View, LoginMVP.Interactor> { return presenter } @Provides fun provideLoginMvpInteractor(interactor: LoginInteractor): LoginMVP.Interactor { return interactor } } 

ActivityComponent.kt

 @PerActivity @Component(dependencies = arrayOf(ApplicationComponent::class), modules = arrayOf(ActivityModule::class)) interface ActivityComponent { fun inject(activity: LoginActivity) } 

LoginActivity.kt

 class LoginActivity : BaseActivity(), LoaderCallbacks<Cursor>, LoginMVP.View { @Inject lateinit var presenter: LoginMVP.Presenter<LoginMVP.View, LoginMVP.Interactor> private var authTask: UserLoginTask? = null override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_login) activityComponent.inject(this) email_sign_in_button.setOnClickListener { presenter.onServerLoginClick(email.text.toString(), password.text.toString()) } presenter.onAttach(this) } } 

LoginMVP.kt

 interface LoginMVP { interface Interactor : MvpInteractor { } @PerActivity interface Presenter<V : LoginMVP.View, out I : LoginMVP.Interactor> : MvpPresenter<V, I> { fun onServerLoginClick(email: String, password: String) } interface View : MvpView { fun openMainActivity() } } 

Answer 1

这不是一个完整的答案，但非常接近。

问题在修改器中。 有了这个修改器匕首尝试注入

 com.xxx.login.LoginMVP.Presenter<com.xxx.login.LoginMVP.View,? extends com.xxx.login.LoginMVP.Interactor> 

但你只提供

  com.xxx.login.LoginMVP.Presenter<com.xxx.login.LoginMVP.View, com.xxx.login.LoginMVP.Interactor> 

（在函数provideLoginPresenter ）。

所以如果删除所有修改（从Presenter ， BasePresenter ， LoginPresenter ）它开始编译和工作。

我不知道为什么Dagger尝试注入错误的类型或不能理解它是相同的类型。 它看起来像注释处理时的错误。 所以最简单的解决方法 – 不要用Dagger的修饰符。