public void convertAddress() {
        Geocoder geoCoder = new Geocoder(this);
        if (alamat != null && !alamat.isEmpty()) {
            try {
                List<Address> addressList = geoCoder.getFromLocationName(alamat, 1);
                if (addressList != null && addressList.size() > 0) {
                    lat = addressList.get(0).getLatitude();
                    lng = addressList.get(0).getLongitude();
                }
            } catch (Exception e) {
                e.printStackTrace();
            } // end catch
        } // end if
    } // end c