Android: How to show my custom view over my MapActivity without xml?

I have some small graphs on display over mapactivity. And when one of these graphs are clicked want to show up detailed graph with transparency over the google map. So I have class "myCusomGraphView extends View{...}" and I w开发者_JAVA百科ant to display it over MapActivity when it needed.

Look into using PopupWindow. Or if you don't want that, use AlertDialog