Flutter : Check GPS Location Mode

Question

I have project related using maps and tracking location user , for this i used Geolocator Package. I need to check current location of user , in my flow project first i check last position of user , if last position null then i check current position of user.

Code

  Position _currentPosition;
  Position get currentPosition => _currentPosition;

  Future<void> getCurrentPosition() async {
    try {
      Position lastPosition = await Geolocator().getLastKnownPosition();
      if (lastPosition != null) {
        print("Success Get Last Position...");
        _currentPosition = lastPosition;
      } else {
        final currentPosition = await Geolocator().getCurrentPosition();
        if (currentPosition != null) {
          print("Success Get Your Current Position...");
          _currentPosition = currentPosition;
        } else {
          throw "Can't Get Your Position";
        }
      }
    } catch (e) {
      throw e;
    }
    notifyListeners();
  }

Then i calling getCurrentPosition Function on my button OnPressed to get location user like this :

Button GetLocation

void goToMaps() async {
    final mapsProvider = context.read<MapsProvider>();
    try {

      print('Get Location User');
      await mapsProvider.getCurrentPosition();
      print('Success Get location User');

    } catch (e) {
      globalF.showToast(message: e.toString(), isError: true, isLongDuration: true);
    }
  }

First Problem is , When GPS Location Mode is Device Only I can't get LastPosition or Current Position it never print Success Get Location User and still print Get Location User.

Second Problem is , When Gps Location Mode is Battery Saving user location i got is very inaccurate, compared i used mode High Accuracy.

My question is , How can i check if gps location mode != High Accuracy , then i can show warning user to set the gps to High Accuracy.

Similiar Like this question

Thank's.

fdermishin fdermishin · Accepted Answer · 2020-06-01T17:19:06

For the second problem, it happens because in High Accuracy mode android uses both GPS and network location, but in Battery Saving mode GPS module is turned off. If it was native Android, you could check provider of the location if you get location from LocationManager. But provider is not available in Flutter in Position class. You can instead use accuracy. If it is greater than a threshold and not suitable for your application, you can suggest the user to turn on High Accuracy mode.

Another options would be to use other package than Geolocator (however I'm not aware of any package that provides necessary interface) or to modify source code of Geolocatior so that it provides information about which mode is currently active.

Flutter : Check GPS Location Mode

Code

Button GetLocation

1 Answers