ApplicationComponent.java

@Singleton
@Component(modules = {
        AndroidModule.class,
        BusModule.class,
        NetworkModule.class,
        AppModule.class
})
public interface ApplicationComponent {
    ...
    Bus bus();
    ...
}

LoginActivity.java

public LoginActivity extends BaseActivity implements LoginViewContract {
  private LoginComponent component;
  
  @Inject LoginPresenter presenter;
  
  @Override
  protected void onCreate(Bundle savedInstanceState) {
      component = DaggerLoginComponent.builder()
            .applicationComponent(getApplicationComponent())
            .loginModule(new LoginModule(this))
            .build();
      component.inject(this);
      super.onCreate(savedInstanceState);
  }
  
  // getApplicationComponent is a convenience method in BaseActivity, here for clarity
  protected ApplicationComponent getApplicationComponent() {
    return ((MyApplication) getApplication()).getComponent();
  }
    
}

LoginComponent.java

@Component(dependencies = ApplicationComponent.class, modules = LoginModule.class)
@ActivityScope
public interface LoginComponent {
    LoginViewContract loginViewContract();

    void inject(LoginActivity activity);
}

LoginModule.java

@Module
public class LoginModule {

    private final LoginActivity activity;

    public LoginModule(LoginActivity activity) {
        this.activity = activity;
    }

    @Provides
    @ActivityScope
    public LoginViewContract provideLoginViewContract() {
        return activity;
    }
}

LoginPresenter.java

public class LoginPresenter implements Presenter {
    
    public interface LoginViewContract {
        ...
    }

    private final LoginViewContract viewContract;
    private final Bus bus;
    
    ...

    // Bus is provided through the application component
    @Inject
    public LoginPresenter(LoginViewContract viewContract, Bus bus) {
        this.viewContract = viewContract;
        this.bus = bus;
    }
    
    ...
}