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get current locaion from GPS in Blackberry application
private class LocationListenerImpl implements LocationListener {
    public void locationUpdated(LocationProvider provider, Location location) {
        if (location.isValid()) {
            heading = location.getCourse();
            longitude = location.getQualifiedCoordinates().getLongitude();
            latitude = location.getQualifiedCoordinates().getLatitude();
            altitude = location.getQualifiedCoordinates().getAltitude();
            speed = location.getSpeed();

            // This is to get the Number of Satellites
            String NMEA_MIME = "application/X-jsr179-location-nmea";
            satCountStr = location.getExtraInfo("satellites");
            if (satCountStr == null) {
                satCountStr = location.getExtraInfo(NMEA_MIME);
            }

            // this is to get the accuracy of the GPS Cords
            QualifiedCoordinates qc = location.getQualifiedCoordinates();
            accuracy = qc.getHorizontalAccuracy();
        }
    }

    public void providerStateChanged(LocationProvider provider, int newState) {
        // no-op
    }
}