Get coordinates via GPS in blackberry

Question

I am calling startLocationUpdate() in BlackBerry simulator 9800 to get coordinates (latitude,longitude) of where I am, i.e. in UAE. However I get coordinates for Canada. What does this mean? Is the GPS not working? I tried checking settings for the simulator and I do not see any option to "turn GPS on". Please guide how to obtain my current location.

private boolean startLocationUpdate()
    {
        boolean retval = false;

            try
            {
            locationProvider = LocationProvider.getInstance(null);

            if ( locationProvider == null )
            {

            Runnable showGpsUnsupportedDialog = new Runnable()
            {
                public void run()
                {

                Dialog.alert("GPS is not supported on this platform, exiting...");
                //System.exit( 1 );
                }
            };

            UiApplication.getUiApplication().invokeAndWait( showGpsUnsupportedDialog ); // Ask event-dispatcher thread to display dialog ASAP.
            }
            else
            {

            locationProvider.setLocationListener(new LocationListenerImpl(), interval, -1, -1);

            retval = true;
            }
            }
            catch (LocationException le)
            {
                System.err.println("Failed to instantiate the LocationProvider object, exiting...");
                System.err.println(le);
                System.exit(0);
            }
            return retval;
            }

            private class LocationListenerImpl implements LocationListener
            {

            public void locationUpdated(LocationProvider provider, Location location)
            {
                    if(location.isValid())
                    {
                        longitude = location.getQualifiedCoordinates().getLongitude();
                        latitude = location.getQualifiedCoordinates().getLatitude();

                        updateLocationScreen(latitude, longitude);              

                    }
            }

            public void providerStateChanged(LocationProvider provider, int newState)
            {
            }
        }

         private void updateLocationScreen(final double latitude, final double longitude)
            {
                    UiApplication.getUiApplication().invokeAndWait(new Runnable()
                    {
                    public void run()
                    {
                    lat = latitude;
                    longt = longitude;


                    RichTextField txt=new RichTextField();
                    txt.setText("Long=="+longt);

                    RichTextField txt1=new RichTextField();
                    txt1.setText("lat=="+lat);

                    add(txt);
                    add(txt1);


//                  persistentLatitude.setContents(Double.toString(latitude));
//                  persistentLongitude.setContents(Double.toString(longitude));



                    }
                    });
            }

I would like to check for both GPS and internet (Wifi,BES,GPRS/edge etc) and whichever connection is available, I would like to acquire coordinates through the available service.

Answer 1

The default GPS location in BB Simulators is set to a position in CANADA (Waterloo as far as I remember), that's why you are getting the coordinates of CANADA. You can change the GPS location from 'Simulate->GPS Location' in BB Simulator. This video from BB SupportForums may help you.

The following links may also be helpful:

1. SO Answer for 'BlackBerry GPS Application'
2. API for BlackberryLocation

For connectivity issues see this link