Hi,

In my MapView based application I need to animate specific overlays, 
whereas others are relatively static.
Currently I call invalidate on the mapview, which causes all overlays to 
be redrawn, whenever I need to animate just one of them.
Is there a more efficient way to animate objects on the map? Is there a 
way to cache the static overlays and reuse them as long as the content 
doesn't change (would that even increase performance)? How do I use 
invalidate(Rect) to make my overlay only redraw the dirty rectangle?

Thanks,
Dani

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