[android-developers] MapView and large number of Overlay

Hi,
I have a problem displaying on a MapView a large number of Overlays. I
have to draw many route paths on the map: I tried to extend Overlay
class but the method draw() is calling very often and it makes
rendering too slow.
So I tried to create a bitmap to append over the map as a OverlayItem
layer (with transparency), it works but it is a little slow on
creating the image and there's a problem about memory of the VM that I
must handle.
I'm finding the best way to draw this semi-static layer as fast as
possible, I'm glad if someone can give me some advice
thank you
Daniele

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