The zoom may be deferred if the MapView hasn't been drawn yet. Have you
tried putting your logic in a Runnable and post()ing it to the MapView?
Steve
On Sun, Aug 29, 2010 at 7:18 PM, Chad McQuillen wrote:
> My application has a MapView which shows a collection of items in a
> satellite view. I use the MapController's zoomToSpan() method to
> initialize the zoom level of MapView. I later discovered that the
> MapView was showing a blank white screen with grey X's (zoom'd too
> far, zoom out once and everything looks as expected) for the use case
> when the collection of item's locations were very close to each
> other. So, I modified the code from this:
>
> mapController.zoomToSpan(latitudeDelta, longitudeDelta);
>
> to this:
>
> mapController.zoomToSpan(latitudeDelta, longitudeDelta);
>
> if (mapView.getZoomLevel() > mapView.getMaxZoomLevel()) {
>mapController.setZoom(mapView.getMaxZoomLevel());
> }
>
> but, I still got the same result. I added some debug before and after
> the zoomToSpan() to retrieve the zoom level from MapView and noticed
> that the zoom level did not change. I'm guessing somehow that the
> work is queued up??
>
> I don't know if this information is important or not to this problem,
> but I'll also mention that the MapView is created from a MapActivity
> which is hosted in the tab host of a TabActivity that contains three
> tabs, one of which is the map. I searched this forum and elsewhere
> and haven't seen anyone encounter such a problem before. I'm hoping
> someone can point me in the right direction.
>
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