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Android Coding an Options Menu

Posted by Tomás Borges
Tomás Borges
4,394 Points

Understanding the code

Hello, I was checking the documentation and I realized Menu was an interface, so in which class is it implemented on the following code??:

@Override public boolean onCreateOptionsMenu(Menu menu) { MenuItem menuItem = menu.add("Next Image"); (...)

1 Answer

Ben Deitch
STAFF
Ben Deitch
Treehouse Teacher
Ben Deitch
Ben Deitch
Treehouse Teacher

Hey Tomas! It would be implemented by the 'menu' being passed into 'onCreateOptionsMenu'.

For example, if we had an interface that required a keyboard, we could have a method like: doSomething(Keyboard keyboard) And we could pass in objects that implement our keyboard interface like doSomething(phone) or doSomething(laptop).

So we're not entirely sure what class is being passed into 'onCreateOptionsMenu'. We just know that, whatever class it is, it definitely implements the Menu interface.

Tomás Borges
Tomás Borges
4,394 Points

I understand now, thanks a lot! :)