JournetMVPLoader_Loader.java

class MainLoader extends Loader<MainPresenter> {
    private MainPresenter presenter;

    /*  When the loader is being created, we instantiate the
        presenter also and keep it's object as private */
    MainLoader(Context context, MainPresenter presenter) {
        super(context);
        this.presenter = presenter;
    }

    /* This function is called when activity is being started.
       Hence we deliver the result, our presenter, here. If the
       activity is destroyed in rotation, the loader isn't created
       again as system made sure it survived the rotation, and   
       thus when starting of activity calls this function again 
       automatically and we deliver the pre-rotation presenter as 
       our result to the activity in onLoadFinished callback*/
    @Override
    protected void onStartLoading() {
        deliverResult(presenter);
    }
}