Вы можете использовать пакет геолокации. Вот пример кода, который я использую, вы сможете определить свою версию из этого:
import 'dart:async';
import 'package:flutter/material.dart';
import 'package:geolocator/geolocator.dart';
import 'package:pedantic/pedantic.dart';
import 'package:rflutter_alert/rflutter_alert.dart';
import 'package:person/generated/i18n.dart';
import 'package:person/models/location_data.dart';
import 'package:person/scoped_models/main.dart';
import 'package:person/shared/global_config.dart' as globals;
import 'package:person/widgets/helpers/dialogue_helper.dart';
import 'package:scoped_model/scoped_model.dart';
final Geolocator _geolocator = Geolocator();
LocationData _currentLocationData;
Position _currentPosition;
String _isoCountryCode = "";
/// This method is used to get the current location of the person.
///
Future<LocationData> getCurrentLocation(
BuildContext context, {
Position currentPosition,
// Will be overridden with false if called from PersonProfilePage and a new
// user is being added.
bool updateDatabase = true,
}) async {
MainModel _model = ScopedModel.of(context);
String _address = "";
_currentLocationData = null;
try {
// Android shows a dialogue which automatically updates the location
// permissions settings.
assert(globals.configFromDatabase != null);
// Creates a new 'location' object ie. a new instance of this class in the geoloc package
_currentPosition = await _geolocator.getCurrentPosition(
desiredAccuracy: globals.configFromDatabase.locationAccuracy);
_address = await _getLocationAddress(
_currentPosition.latitude, _currentPosition.longitude);
_currentLocationData = LocationData(
latitude: _currentPosition.latitude,
longitude: _currentPosition.longitude,
address: _address,
isoCountryCode: _isoCountryCode,
);
// Update the person's current location unless this is a new
// user being created in the PersonProfilePage. In that case the form data
// created from this method will be used when the save button is pressed.
if (updateDatabase) {
assert(_currentLocationData != null);
unawaited(_model.updateCurrentLocation(_currentLocationData));
}
return _currentLocationData;
} catch (error) {
unawaited(
showAlertDialogue(
<Your dialogue>
),
);
return null;
}
}
/// This method retrieves placemark data based on a latitude and longitude
/// value pair. It then assembles the data items into an address suitable for
/// display in the app and retains the ISO3166-2 Country code in a separate
/// variable for later storage on the database against the person.
///
/// ! The Geolocator package provides this data for free so there is no need
/// ! to pay for the Google Geocoding API.
///
Future<String> _getLocationAddress(double latitude, double longitude) async {
List<Placemark> newPlace =
await _geolocator.placemarkFromCoordinates(latitude, longitude);
Placemark placeMark = newPlace[0];
String name = placeMark.name;
// String subLocality = placeMark.subLocality;
String locality = placeMark.locality;
String administrativeArea = placeMark.administrativeArea;
// String subAdministrativeArea = placeMark.administrativeArea;
String postalCode = placeMark.postalCode;
String country = placeMark.country;
// String subThoroughfare = placeMark.subThoroughfare;
String thoroughfare = placeMark.thoroughfare;
_isoCountryCode = placeMark.isoCountryCode;
return "$name, $thoroughfare, $locality, $administrativeArea, $postalCode, $country";
}