[android-developers] Re: Location Listener Question

>>>>> "Jake" == Jake Colman <colman@ppllc.com> writes:

Jake> Yes, I know that there are a million resources out there that
Jake> deal with the best way to obtain a location and I did google
Jake> quite a bit before making this post. If someone can point me
Jake> to something I missed, I'd appreciate it.

Jake> Having said this my needs (for the purpose of this question)
Jake> are quite simple: Once an hour I want to obtain my location
Jake> from the Network.

Jake> Here is what I did:

Jake> 1) Created an alarm to trigger once an hour.
Jake> 2) Invoke LocationManager.removeUpdates().
Jake> 3) Request location updates, specifying a listener. I am
Jake> specifying minTime and minDistance values of 0.
Jake> 4) As soon as the listener is fired, save the location and
Jake> invoke LocationManager.removeUpdates().

Jake> I see a few issues with this:

Jake> 1) I am shutting down the listener as soon as I get an update.
Jake> But I should probably wait for a few updates in order to
Jake> allow it to zero in on the location (I already have code
Jake> that figures out best location from those available).

Jake> 2) The listener does not seem to fire consistently. My
Jake> location is not always getting updated and it looks like the
Jake> listener is simply not getting called.

Jake> I ran some tests where I never remove updates. With the above
Jake> settings my listener is being called appx every 45 seconds. So
Jake> I know that my overall code is written correctly.

Jake> What is the canonical "best" way to do what I want? Should I
Jake> collect updates in my Listener for, say, 2 minutes and use an
Jake> alarm (set to trigger two minutes after my hourly alarm is
Jake> triggered) to remove updates? Is there a better way to solve
Jake> this problem?

I think I know why my listener is not always firing but I'm not sure
what to do about it. The request for location updates is coming from a
Service that is periodically updating a widget. Looking the logcat, it
looks like the service gets destroyed before I received the update. If
the service is destroyed, the listener object is gone too!

How does one typically deal with this situation?

--
Jake Colman -- Android Tinkerer

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