android Mvp pattern passing context as view

Question

I have tried to pass Mainactivity as view to presenter

(In MainActivity)    
mainPresenter = new MainPresenter(this);

(Presenter cont)
public MainPresenter(View view) {
      this.view = view;
      user  = new User();
   }

However, this throw error which is invalid casting or something. Am I missing something?

That code is from here

Answer 1

You should have something like that :

public interface YourView {
    void doSomething();
}

public MainActivity extends Activity implements YourView {

mainPresenter = new MainPresenter(this);

}

public MainPresenter(YourView view) {
      this.view = view;
      view.doSomething();
   }