Suppose I have a Button in my Activity which shows me a Toast message when it is clicked. Now my question is, should I notify the Presenter when my button is clicked and the Presenter should decide what the View should do or it is not required to notify the Presenter and my View can itself show a message?
Even though the presenter isn't (currently) supposed to provide any data from the model to be shown in Toast upon a button click, it is still a good approach to notify the presenter by the following reasons:
Toast in the future. Such a modification would require less effort.