Dagger不會爲Android生成Dagger類

我正在嘗試用Dagger設置一個項目。現在，當我建立，爲組件生成任何匕首的*類，我得到了以下錯誤：Dagger不會爲Android生成Dagger類

Error:(10, 8) error: [com.redditapp.dagger.RedditAppGraph.inject(com.redditapp.RedditApplication)] 
com.redditapp.ui.ActivityHierarchyServer cannot be provided without an @Provides- or @Produces-annotated method. 
com.redditapp.ui.ActivityHierarchyServer is injected at 
com.redditapp.RedditApplication.activityHierarchyServer 
com.redditapp.RedditApplication is injected at 
com.redditapp.dagger.RedditAppGraph.inject(app)

和

Error:(13, 10) error: com.redditapp.base.navigation.activity.ActivityScreenSwitcher cannot be provided without an @Inject constructor or from an @Provides-annotated method. 
com.redditapp.base.navigation.activity.ActivityScreenSwitcher is injected at 
com.redditapp.ui.screens.home.HomePresenter.<init>(screenSwitcher) 
com.redditapp.ui.screens.home.HomePresenter is injected at 
com.redditapp.ui.screens.home.HomeActivity.presenter 
com.redditapp.ui.screens.home.HomeActivity is injected at 
com.redditapp.ui.screens.home.HomeComponent.inject(activity)

這裏是我的當前設置。

應用程序級類使用：

public void buildComponentAndInject() { 
     component = RedditAppComponent.Initializer.init(this); 
     component.inject(this); 
    }

的RedditAppComponent看起來像這樣，也不產生DaggerRedditAppComponent，因此是紅色：

@ApplicationScope 
@Component(modules = { RedditAppModule.class, UiModule.class}) 
public interface RedditAppComponent extends RedditAppGraph { 
    /** 
    * An initializer that creates the graph from an application. 
    */ 
    final class Initializer { 
     public static RedditAppComponent init(RedditApplication app) { 
      return DaggerRedditAppComponent.builder() 
        .redditAppModule(new RedditAppModule(app)) 
        .uiModule(new UiModule()) 
        .build(); 
     } 
     private Initializer() {} // No instances. 
    } 
}

與父類RedditAppGraph：

public interface RedditAppGraph { 
    void inject(RedditApplication app); 
    ViewContainer viewContainer(); 
    ActivityHierarchyServer activityHierarchyServer(); 
}

包含提供者方法的UI模塊是throwin g的錯誤看起來像︰

@Module 
public class UiModule { 

    @Provides 
    @ApplicationScope 
    ActivityScreenSwitcher provideActivityScreenSwitcher() { 
     return new ActivityScreenSwitcher(); 
    } 

    @Provides 
    @ApplicationScope 
    @ActivityScreenSwitcherServer 
    ActivityHierarchyServer provideActivityHierarchyServer(final ActivityScreenSwitcher screenSwitcher) { 
     return new ActivityHierarchyServer.Empty() { 
      @Override 
      public void onActivityStarted(Activity activity) { 
       screenSwitcher.attach(activity); 
      } 

      @Override 
      public void onActivityStopped(Activity activity) { 
       screenSwitcher.detach(); 
      } 
     }; 
    } 
}

我試過重建項目，看看它是否會生成類。

來源

2016-12-19 AggieDev

你在應用編譯器嗎？你是否在你的build gradle中使用了'apt「com.google.dagger：dagger-compiler：2.8」''？ – Fred

我這樣做，但不是apt我正在使用annotationProcessor。 – AggieDev

看起來像ActivityScreenSwitcherServer是一個限定符。如果是這樣的話，您將綁定您的ActivityHierarchyServer與限定符，但在您的組件（通過RedditAppGraph）暴露ActivityHierarchyServer沒有它。從您的@Provides方法中刪除限定符或將其添加到組件接口。

來源

2016-12-19 17:36:07 gk5885

真棒，感謝格雷戈裏！像魅力一樣工作。 – AggieDev

FWIW，我們計劃在錯誤信息中給你「建議的修復」，但我們還沒有完成。 – gk5885

Dagger不會爲Android生成Dagger類

回答

相關問題