实现Geocoder时返回null

double lat = (double) (coord.getLat() * (1e-6));
double lon = (double) (coord.getLon() * (1e-6));
try { 
    List<Address> list = geocoder.getFromLocation(lat, lon,1);

    if (list != null && list.size() > 0) {
        Address address = list.get(0);
        result = address.getAddressLine(0) + \", \"
            + address.getLocality();
    }
System.out.println(\"adresa returnata folosind geocoder:\"
                + result);
}

System.out.println()

:null