Android : MultiAutoCompleteTextView custom button on dropdown

I'm looking to add a "load from server" button to the dropdown while typing in a MultiAutoCompleteTextView. Do you know how I can achieve this?

I know I can add different kinds of views into the dropdown, but even if I put something at the end, it will dismiss the dropdown when I press on it. I'd like for it to stay open even when I tap on it, so it will say loading, then the results will refresh.