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Question

我已经研究了有关此问题的多个帖子，但是建议的解决方案似乎都无法解决我的问题。我看过的一些帖子在下面提供

但是我不知道我在做什么错。这是我的设置。我要在两个单独的类中注入一个名为NotificationManager的类。情况在下面给出

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class PushJobIntentService extends JobIntentService {
    @Inject
    PushService pushService

    @Override
    public void onCreate()
    {
        AndroidInjection.inject(this);
        super.onCreate();
    }

    @Override
    protected void onHandleWork(@NonNull Intent intent)
    {
        .. Do Work . . . 
    }
}

PushService是一个简单的POJO，其实例依赖关系图如下。 NotificationManager通过构造函数注入PushService。

PushService -> NotificationManager -> (Context, Map <String, NotificationBuilder>)

在此示例中，PushService依赖于NotificationManager，后者依赖于Android Context，而Map则依赖于Map（在这种情况下，NotificationBuilder是一个接受Context作为构造函数参数的POJO）。

我们有一个通用的AppModule，其中定义了所有依赖项，这就是它的设置方式

@ContributesAndroidInjector(modules = {PushServiceModule.class})
abstract PushJobIntentService contributePushJobIntentServiceInjector();

PushServiceModule注入依赖项，如下所示：

@Module(includes = {NotificationManagerModule.class})
public abstract class PushServiceModule
{
    . . . Dependenies of PushService . . . 
}

NotificationManagerModule

@Module()
public abstract class NotificationManagerModule
{
    @Provides
    static Map<String, NotificationBuilder> provideNotificationBuilders(Context context)
    {
        Map<String, NotificationBuilder> builders = new HashMap<>();
        builders.put("Key1",new NotificationBuilder(context, "Key1", "Text1"));
        return Collections.unModifiableMap(builders);
    }
}

2

第二个依赖图如下

AppSignOutHelper -> LoggedOutTask (Async Task) -> NotificationManager

我正在尝试将NotificationManager注入LoggedOutTask。 AppSignOutHelper实现SignOutHelper，其定义如下

/**
 * Binds the {@link AppSignOutHelper} instance to the shared {@link SignOutHelper} interface.
 */
@Binds
@Qualifier
abstract SignOutHelper bindSignOutHelper(AppSignOutHelper appSignOutHelper);

问题

当我尝试编译项目时，这是我得到的错误

/Users/username/sourcecode/android/app/src/main/java/com/myproject/mobile/dagger/AppComponent.java:50: warning: [Dagger/DuplicateBindings] com.myproject.android.notifications.NotificationManager is bound multiple times:
public interface AppComponent extends DomainComponent
       ^
      @Inject com.myproject.android.notifications.NotificationManager(android.content.Context, Map<String,com.myproject.android.notifications.NotificationBuilder>) [com.myproject.android.dagger.AppComponent]
      @Provides com.myproject.android.notifications.NotificationManager com.myproject.android.notifications.NotificationManagerModule.provideNotificationManager(android.content.Context, Map<String,com.myproject.android.notifications.NotificationBuilder>) [com.myproject.android.dagger.AppComponent → com.myproject.android.dagger.AppModule_ContributePushJobIntentServiceInjector.PushJobIntentServiceSubcomponent]
  This condition was never validated before, and will soon be an error. See https://dagger.dev/conflicting-inject.
      com.myproject.android.notifications.NotificationManager is injected at
          com.myproject.android.notifications.PushService( myproject.NotificationManager)
      com.myproject.android.notifications.PushService is injected at
          com.myproject.android.notifications.PushJobIntentService.pushService
      com.myproject.android.notifications.PushJobIntentService is injected at
          dagger.android.AndroidInjector.inject(T) [com.myproject.android.dagger.AppComponent → com.myproject.android.dagger.AppModule_ContributePushJobIntentServiceInjector.PushJobIntentServiceSubcomponent]
/Users/username/sourcecode/android/app/src/main/java/com/myproject/mobile/dagger/AppComponent.java:50: error: [Dagger/MissingBinding] java.util.Map<java.lang.String,com.myproject.android.notifications.NotificationBuilder> cannot be provided without an @Provides-annotated method.
public interface AppComponent extends DomainComponent
       ^
  A binding with matching key exists in component: com.myproject.android.dagger.AppModule_ContributePushJobIntentServiceInjector.PushJobIntentServiceSubcomponent
      java.util.Map<java.lang.String,com.myproject.android.notifications.NotificationBuilder> is injected at
          com.myproject.android.notifications.NotificationManager(…, notifBuilderMap)
      com.myproject.android.notifications.NotificationManager is injected at
          com.myproject.android.notifications.CreateLoggedOutNotificationTask(…, myproject.NotificationManager)
      javax.inject.Provider<com.myproject.android.notifications.CreateLoggedOutNotificationTask> is injected at
          com.myproject.android.AppSignOutHelper(…, loggedOutNotificationTask, …)
      com.myproject.android.AppSignOutHelper is injected at
          com.myproject.android.dagger.AppModule.bindSignOutHelper(appSignOutHelper)
     com.myproject.android.SignOutHelper is injected at
          com.myproject.android.dagger.DomainModule.provideSignOutHelper(…, optionalInstance)
      com.myproject.android.SignOutHelper is provided at
          com.myproject.android.dagger.DomainComponent.getSignOutHelper()
1 error
1 warning

但是，如果我没有在PushServiceModule中包含NotificationManagerModule，请按照以下步骤进行操作：

@Module()
public abstract class PushServiceModule
{
    . . . Dependenies of PushService . . . 
}

我收到以下错误

/Users/username/sourcecode/android/app/src/main/java/com/myproject/mobile/dagger/AppComponent.java:50: error: [Dagger/MissingBinding] java.util.Map<java.lang.String,com.myproject.android.notifications.NotificationBuilder> cannot be provided without an @Provides-annotated method.
    public interface AppComponent extends DomainComponent
           ^
          java.util.Map<java.lang.String,com.myproject.android.notifications.NotificationBuilder> is injected at
              com.myproject.android.notifications.NotificationManager(…, notifBuilderMap)
          com.myproject.android.notifications.NotificationManager is injected at
              com.myproject.android.notifications.CreateLoggedOutNotificationTask(NotificationManager)
          javax.inject.Provider<com.myproject.android.notifications.CreateLoggedOutNotificationTask> is injected at
              com.myproject.android.AppSignOutHelper(…, loggedOutNotificationTask, …)
          com.myproject.android.AppSignOutHelper is injected at
              com.myproject.android.dagger.AppModule.bindSignOutHelper(appSignOutHelper)
           com.myproject.android.SignOutHelper is injected at
              com.myproject.android.dagger.DomainModule.provideSignOutHelper(…, optionalInstance)
          com.myproject.android.SignOutHelper is provided at
              com.myproject.android.dagger.DomainComponent.getSignOutHelper()
      The following other entry points also depend on it:
          dagger.android.AndroidInjector.inject(T) [com.myproject.android.dagger.AppComponent → com.myproject.android.dagger.AppModule_ContributePushJobIntentServiceInjector.PushJobIntentServiceSubcomponent]
    1 error

期望的行为

我希望能够将NotificationManager注入到CreateLoggedOutTask中，然后将其注入AppSignOutHelper中。我在做什么错了？

Dagger 2依赖图被绑定多次

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0 个答案: