[mono-android] maps - I'm doing something wrong

[Jonathan Pryor]

On Nov 9, 2011, at 6:57 PM, Wally McClure wrote:
> I've got the code below.  I have a "real" key determined from the machine that I am running on right now (I know because I just recreated it).  The problem that I am running into is that the map_view is sometimes null and sometimes not.  Has anyone else seen this behavior?

I'm betting it's a threading problem:

	http://code.google.com/android/add-ons/google-apis/reference/com/google/android/maps/MyLocationOverlay.html#runOnFirstFix(java.lang.Runnable)

	"as soon as we get a location fix, we'll run it in in a new thread"

Which means this:

> location_overlay.RunOnFirstFix(delegate
> {
>     map_view.Controller.AnimateTo(location_overlay.MyLocation);
> });

may invoke `map_view` from the wrong thread. Try changing it to:

	location_overlay.RunOnFirstFix (delegate {
			RunOnUiThread (() => map_view.Controller.AnimateTo(location_overlay.MyLocation));
	});

 - Jon