Location provider for flutter projects, Riverpod, Location

location.provider.dart

import 'dart:async';

import 'package:flutter/cupertino.dart';
import 'package:hooks_riverpod/hooks_riverpod.dart';
import 'package:location/location.dart';

class PersonLocationProvider extends ChangeNotifier {
  Location _location = new Location();
  PermissionStatus _permissionGranted;
  StreamController<LocationData> currentLocation = StreamController.broadcast();

  PersonLocationProvider() {
    _init();
  }

  _checkPermission() async {
    _permissionGranted = await _location.hasPermission();
    if (_permissionGranted == PermissionStatus.denied) {
      _permissionGranted = await _location.requestPermission();
      if (_permissionGranted != PermissionStatus.granted) {
        return;
      }
    }
  }

  _init() {
    _checkPermission();
    currentLocation.addStream(_location.onLocationChanged);
  }
}

final locationProvider = ChangeNotifierProvider<PersonLocationProvider>((ref) {
  return PersonLocationProvider();
});

final locationStreamProvider = StreamProvider.autoDispose<LocationData>(
  (ref) {
    ref.maintainState = true;
    final stream = ref.read(locationProvider).currentLocation.stream;

    return stream;
  },
);