How to show a small clickable item on Android map

I'm working on maps on Android. I create at runtime overlays and, when clicked, I show a dialog that, when clicked, goes to a new activity. I don't like so much the dialog so I would like to show a smaller clickable object (like in foursquare or in photos application f开发者_Go百科or iPhone). Has anyone done something similar?

you need to create custom overlays for map annotations.

here is some code from github