public class YourActivity extends AppCompatActivity implements ViewActivity {

    @Presenter //<-- Just annotate your presenter
    YourPresenter presenter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        //And call bind on the generated class with your presenter args
        YourPresenter_Slick.bind(this, 123, "foo");
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_your);
    }
    
    @Override
    public showMessage(String message) {
        
    }
}

public class YourPresenter extends SlickPresenter<ActivityView> {

    public YourPresenter(@NonNull int code, String s) {
    }

    @Override
    public void onViewUp(@NonNull ActivityView view) {
        //view onStart
    }

    @Override
    public void onViewDown() {
        //view onStop
    }

    @Override
    public void onDestroy() {
        //only is called once when view is finishing
    }
}

public interface ActivityView {
    void showMessage(String message);
}

public class YourPresenterUni extends SlickPresenterUni<ViewActivity, ViewStateActivity> {

    /** ... **/

    @Override
    protected void start(@NonNull ViewActivity view) {
        Observable<PartialViewState<ViewStateActivity>> like = command(ViewActivity::likeMovie)
                .flatMap(id -> repositoryMovies.like(id).subscribeOn(io))//call to backend
                .map(PartialViewStateLiked::new);

        Observable<PartialViewState<ViewStateActivity>> loadComments = command(ViewActivity::loadComments)
                .flatMap(id -> repositoryComments.load(id).subscribeOn(io))
                .map(PartialViewStateComments::new);

        subscribe(new ViewStateActivity(Collections.emptyList(), false), merge(like, loadComments));
    }

    @Override
    protected void render(@NonNull ViewStateActivity state, @NonNull ViewActivity view) {
        if (!state.comments().isEmpty()) view.showComments(state.comments());
        else view.showNoComments();
        view.setLike(state.isLiked());
    }
}