How to connect a Activity to its Presenter without Injection?

[matbrandao]

I am not able to link my Activity witch extends from RosieAppCompatActivity, to my Presenter.

When i try

@Inject @Presenter
WelcomePresenter presenter;

I always get the error "The presenter instance to be registered can't be null".

How do i link my activity to its presenter without the use of Injection?

[flipper83]

Hi, We have a way to add presenters without use annotations. you need invoke the method registerPresenter with your presenter, you need create manually, and register on your onCreate activity life cycle.

you need remove @Inject and @Presenter for you activity.

[pedrovgs]

Hi @matbrandao if you are extending from RosieActivity or RosieAppCompatActivity and you get the error The presenter instance to be registered can't be null is because the presenter instance has not been initialized. You need to create an instance of your presenter and then register it manually. If you want to use the @Presenter annotation and you don't need the dependency injection feature I recommend you to not to extend from RosieAppCompatActivity and use the PresenterLifeCycleLinker manually. An example could be:

public abstract class MyBaseActivity extends FragmentActivity
    implements RosiePresenter.View {

  private PresenterLifeCycleLinker presenterLifeCycleLinker = new PresenterLifeCycleLinker();

  @Presenter MyPresenter myPresenter;
  @Override protected void onCreate(Bundle savedInstanceState) {
    ...
    myPresenter = MyPresenter();
    presenterLifeCycleLinker.initializeLifeCycle(this, this);
    ...
  }
  @Override protected void onResume() {
    ...
    presenterLifeCycleLinker.updatePresenters(this);
    ...
  }

  @Override protected void onPause() {
    ...
    presenterLifeCycleLinker.pausePresenters();
    ...
  }

  @Override protected void onDestroy() {
    ...
    super.onDestroy();
    ...
  }

}

You can also initialize your presenter instance inline or try to initialize it before to call super.

Is this the answer to your question?

[matbrandao]

Using registerPresenter did it for me. Thank you for the help, and great work with the library!

[pedrovgs]

You are welcome :)