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Old 01-08-2009, 01:50 AM   #1 (permalink)
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Default Location API not working for custom/third-party applications

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I'm trying to write a simple GPS based application for my BB 8800.

But for some reason my code getLocation(timeout) always returns with a non-valid location (only after timing out). I tried different combinations of criteria parameters with no success.

I'm pretty sure that the problem is not with my code because even the BlackBerry GPS demo application does not work. However, my GPS receiver is working fine because "Wayfinder", a maps application that came bundled with my BB, works fine.

To test it further, I tried running SpotFinder and Google Maps. But they did not work either. Google Maps could determine location using cell tower info but not GPS.

Here are some more details about my environment,
1. Phone Model: BlackBerry 8800
2. Carrier: AirTel (India)
3. Device Version: 4.2.168 (Platform 2.3.0.54)


Thanks In Advance

Last edited by nikhilbelsare : 01-08-2009 at 01:51 AM. Reason: Title was incorrect
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Old 02-26-2009, 10:39 AM   #2 (permalink)
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Ive had some trouble as well in the past, but I've managed to overcome any problems. Try this:
Code:
            Criteria c = new Criteria();
            
            // We're aiming for Assisted and/or Autonomous GPS
            c.setAddressInfoRequired(false);    
            c.setCostAllowed(true);                                         // this means 'allow assisted GPS', as the network will be used
            c.setSpeedAndCourseRequired(true);                              // overriden from default
            c.setHorizontalAccuracy(Criteria.NO_REQUIREMENT);               
            c.setPreferredPowerConsumption(Criteria.POWER_USAGE_HIGH);      // This signifies Ass. GPS and Aut. GPS
            c.setVerticalAccuracy(Criteria.NO_REQUIREMENT);

            try
            {
                _instance._locationProvider = LocationProvider.getInstance(c);
                if ( _instance._locationProvider == null )
                {
                     _gpsPositionlistener.GPSPositionNotFound(GPSPositionListener.ERROR_NO_GPS_DEVICE_AVAILABLE);
                    return;
                }
                // we want fixes every 3 seconds, when the GPS is on
                // for every fix during those 3 seconds, we filter the invalid locations (i.e., 
                // those that do not qualify as full-fledged GPS locations)
                // we don't use timeout, or maxage, as we determine for ourselves what locations
                // we want to use
                _instance._locationProvider.setLocationListener(_instance, 3, -1, -1);

            }
            catch (LocationException ex){}
            catch (SecurityException ex){} 
            catch (IllegalArgumentException e){}
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