I'd like to draw only overlays without map tiles.
I mean that I just want to use MapView object's control without displaying maps.
I supposed that if I could make a sub-class of MapView, I could draw my own function, which would draw overlays only.
However, I could find out that MapView class has the final protected OnDraw function.
It means that it is impossible to override OnDraw function.
Is it possible to draw overlays without map tiles?
If you have some ideas, please comment me.