Dagger 2 - Why is this a dependency cycle?

Question

I'm trying to inject the application's Context into 2 other objects, an AuthManager and an ApiClient.

Both of them depends on said context, and the ApiClient depends on the AuthManager. Why is this a dependency cycle, if Context doesn't have a reference to the others 2? can this be solved?

EDIT: here is some code

@Module
public class AppModule {

    private final Application application;

    public AppModule(Application application) {
        this.application = application;
    }

    @Provides @Singleton
    Context provideApplicationContext() {
         return this.application;
    }
}


@Module
public class NetworkModule {

    @Provides @Singleton
    public AuthManager providesAuthManager(AuthManager manager) {
        return manager;
    }

    @Provides @Singleton
    public ApiClient providesApiClient(ApiClientFactory factory) {
        return factory.create();
    }
}

@Singleton
@Component(modules = {AppModule.class, NetworkModule.class})
public interface ApplicationComponent {
    void inject(BaseActivity activity);

    // Exported for child-components
    Context context();
    ApiClient apiClient();
    AuthManager authManager();
}

Solution 1

@Provides @Singleton
public AuthManager providesAuthManager(AuthManager manager) {
    return manager;
}

Your providesAuthManager method which provides an AuthManager depends on an AuthManager.

There's your cycle :)

Solution 2

Remove the providesAuthManager method and add @Inject in your AuthManager Constructor.

Comments

[nhaarman]

It helps to add any error messages you get to the question. In this case, you've interpreted the error message the wrong way, making it harder for us to help :)

[Christopher Francisco]

I see. It seems I misunderstood the coffee maker example, as I thougt by placing the AuthManager as a local param, dagger would auto-inject to it. Seems like the right way is to set the Context as the local param. Thanks :)

[user3265561]

This answer prompted me to double check a provides method and saved me hours of effort tracking down something caused by a simple typo. Thanks!

[nhoxbypass]

This lead to other error: "...cannot be provided without @Provide annotated-method"

[Derek Zhu]

I think what you are looking for is @Bind