Question

i am developing app in Blackberry which have GPS Functionality. so first i want to get Current latitude and longitude but it will dipslay like time out while waiting for GPS loaction. Below in my code for getting lat and long of current location.

public class LocationScreen extends MainScreen 
{
      public LocationScreen() 
      {
        super();
        final LabelField lfLocation = new LabelField();
        new Thread()
        {
          public void run() 
          {
            LocationHandler lh = new LocationHandler();
            final String msg = "Long: " + lh.getCurrentLongitude() + ", Lat: " + lh.getCurrentLatitude();

            Application.getApplication().invokeLater(new Runnable() 
            {
              public void run() 
              {
                lfLocation.setText(msg);
                add(new LabelField("Lat and Long=="+msg));
              }
            });
          }
        }.start();
        this.add(lfLocation);
      }
    }

**Second Class**

public class LocationHandler 
{
  private LocationProvider locationProvider;
  private Location currentLocation;
  public LocationHandler()  
  {
    try 
    {
      locationProvider = LocationProvider.getInstance(null);
      currentLocation = locationProvider.getLocation(60);
    }
    catch (final Exception e) 
    {
      Application.getApplication().invokeLater(new Runnable() 
      {
        public void run() 
        {
          Status.show(e.getMessage());
        }
      });
    }
  }
  public double getCurrentLongitude() 
  {
    if(currentLocation != null)
      return currentLocation.getQualifiedCoordinates().getLongitude();
    return -1;
  }
  public double getCurrentLatitude() 
  {
    if(currentLocation != null)
      return currentLocation.getQualifiedCoordinates().getLatitude();
    return -1;
  }

what i am doing mistake in my code please help me.
Thanx in advance.

Answer 1

Make simple Thread and write down below code in run method .

private BlackBerryCriteria blackBerryCriteria = null;
private BlackBerryLocation blackBerryLocation = null;
private BlackBerryLocationProvider blackBerryLocationProvider = null;
double lat = 0.0;
double lng = 0.0;

blackBerryCriteria = new BlackBerryCriteria();

    if(GPSInfo.isGPSModeAvailable(GPSInfo.GPS_MODE_CELLSITE)) 
    {
        blackBerryCriteria.setMode(GPSInfo.GPS_MODE_CELLSITE);
    }
    else if(GPSInfo.isGPSModeAvailable(GPSInfo.GPS_MODE_ASSIST)) 
    {
        blackBerryCriteria.setMode(GPSInfo.GPS_MODE_ASSIST);
    }
    else if(GPSInfo.isGPSModeAvailable(GPSInfo.GPS_MODE_AUTONOMOUS)) 
    {
        blackBerryCriteria.setMode(GPSInfo.GPS_MODE_AUTONOMOUS);
    }
    else 
    {
        blackBerryCriteria.setCostAllowed(true);
        blackBerryCriteria.setPreferredPowerConsumption(Criteria.POWER_USAGE_LOW);
    }

try {
            blackBerryLocationProvider = (BlackBerryLocationProvider) BlackBerryLocationProvider.getInstance(blackBerryCriteria);
            blackBerryLocation = (BlackBerryLocation) blackBerryLocationProvider.getLocation(60);

            QualifiedCoordinates qualifiedCoordinates = blackBerryLocation.getQualifiedCoordinates();

            lat = qualifiedCoordinates.getLatitude();
            lng = qualifiedCoordinates.getLongitude();}catch(Exception e)
        {
            System.out.println("Error in location :"+e.toString());
            System.out.println("Error in location :"+e.getMessage());
        }

Try this it working fine in my device using BIS.
i hope it will help you ..