Android find GPS location once, show loading dialog

Question

I am writing an app that requires the user\'s current location (lastknownlocation won\'t be very helpful) and displays a list of all the closest \"items\" to them taken from

Answer 1

I still don't like how this works at all and it seems way more complicated than it should be but until someone provides a better way I have it working for now...

If someone comes across this and suggest a much better cleaner result to just get the user's current location coordinates just once then stop looking that would be greatly appreciated!!

private LocationControl locationControlTask;
private boolean hasLocation = false;
LocationHelper locHelper;

From onCreate() I call

locHelper = new LocationHelper();
locHelper.getLocation(context, locationResult);
locationControlTask = new LocationControl();
locationControlTask.execute(this);

I then have a a private class LocationControl

private class LocationControl extends AsyncTask
    {
        private final ProgressDialog dialog = new ProgressDialog(activityname.this);

        protected void onPreExecute()
        {
            this.dialog.setMessage("Searching");
            this.dialog.show();
        }

        protected Void doInBackground(Context... params)
        {
            //Wait 10 seconds to see if we can get a location from either network or GPS, otherwise stop
            Long t = Calendar.getInstance().getTimeInMillis();
            while (!hasLocation && Calendar.getInstance().getTimeInMillis() - t < 15000) {
                try {
                    Thread.sleep(1000);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            };
            return null;
        }

        protected void onPostExecute(final Void unused)
        {
            if(this.dialog.isShowing())
            {
                this.dialog.dismiss();
            }

            if (currentLocation != null)
            {
                useLocation();
            }
            else
            {
                //Couldn't find location, do something like show an alert dialog
            }
        }
    }

Then a locationResult..

public LocationResult locationResult = new LocationResult()
    {
        @Override
        public void gotLocation(final Location location)
        {
            currentLocation = new Location(location);
            hasLocation = true;
        }
    };

Also to avoid you pulling your hair out like I did for ages remember to stop the locationcontrol task if someone leaves the activity early and also stop location updates to stop the GPS from running when the user leaves. In onStop() do something like this:

locHelper.stopLocationUpdates();
locationControlTask.cancel(true);

Also stopLocationUpdates in the Location Helper class does the following:

public void stopLocationUpdates()
{
locationManager.removeUpdates(locationListenerGps);
locationManager.removeUpdates(locationListenerNetwork);
}

Good luck with it, I needed it...