Question

I am having difficulty getting my Monodroid application retrieve a location when I run it in an emulator. My code looks something like this:

LocationManager locationsManager = (LocationManager)threadSurfaceView.Context.GetSystemService(Context.LocationService);

location = locationsManager.GetLastKnownLocation(Android.Content.Context.LocationService);

However, this always seems to return null. Do I have to configure the emulator in some way so that it has a locaion service and/or location?

I also tried adding a LocationListener:

locationListener = new MyLocationListener();

locationsManager.RequestLocationUpdates(LocationManager.GpsProvider, 120000, 0, locationListener);

But the problem I had here was to create the MyLocationListener class. I implemented the four public methods (OnLocationChanged(Location) and so on), but Visual Studio complained about a missing Android.Runtime.IJavaObject method – does anyone have a simple example of a class that implements ILocationListener?

Thanks for any help. Martin

Answer 1

I got a kindly link to a sample at

https://github.com/gshackles/Sample-Projects/blob/master/MonoDroid/MonoDroidSamples/MonoDroidSamples/DemoActivities/LocationDemo/LocationActivity.cs

Which works fine on my Nexus S but still will not work on the emulator – so (perhaps) the issue is not a code issue.

I liked the technique in this sample of getting the “Activity” to implement ILocationListener as well as Activity – a neat solution to getting data back out of the “listener” function which had been giving me headaches when it was wrapped into another class.

I downloaded the bundle of samples and if you do the same then you will need to grab an mp3 file – rename it volbeat.mp3 and add it to the “raw” folder within “Resources” as it is missing.