[英]Dagger won't generate Dagger classes for Android
我正在尝试与Dagger建立一个项目。 现在,当我构建时,没有为组件生成任何Dagger *类,并且出现以下错误:
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)
这是我当前的设置。
应用程序级别的类使用:
public void buildComponentAndInject() {
component = RedditAppComponent.Initializer.init(this);
component.inject(this);
}
RedditAppComponent看起来像这样,并且DaggerRedditAppComponent未生成,因此是红色的:
@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.
}
}
使用父类RedditAppGraph:
public interface RedditAppGraph {
void inject(RedditApplication app);
ViewContainer viewContainer();
ActivityHierarchyServer activityHierarchyServer();
}
包含引发错误的提供程序方法的UI模块如下所示:
@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();
}
};
}
}
我试过重建项目,看它是否会生成类。
看来ActivityScreenSwitcherServer
是一个限定词。 在这种情况下,您要将ActivityHierarchyServer
与限定符绑定在一起,但不使用它就将ActivityHierarchyServer
暴露在组件上(通过RedditAppGraph
)。 从@Provides
方法中删除限定符或将其添加到组件接口。
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