GpsStatus.Listener listener = new GpsStatus.Listener() { 
    void onGpsStatusChanged(int event) { 
        if (event == GPS_EVENT_SATELLITE_STATUS) { 
            GpsStatus status = mLocManager.getGpsStatus(null); 
            Iterable<GpsSatellite> sats = status.getSatellites(); 
            // Check number of satellites in list to determine fix state 
        } 
    } 
}