title: Info Window on shapes(circle, polygon) in Android Maps App
body: <p>I have an android app which one of its screens uses google maps, and I load some regions on it. I want to be able to click on a region/shape(circle or polygon) and an info window to appear. I am searching but I cant find enough  information on how to show info windows on shapes, only on markers. Is that not  a common practice? What should I do? Could anyone help, even theoretically? Any help or direction would be appreciated, thank you very much! </p>