fix location permission flow

Author: LonelyCpp

lib/src/screens/weather_screen.dart

@@ -4,7 +4,9 @@ import 'package:flutter_weather/src/bloc/weather_event.dart';
 import 'package:flutter_weather/src/bloc/weather_state.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
 import 'package:flutter_weather/src/widgets/weather_widget.dart';
+import 'package:geolocator/geolocator.dart';
 import 'package:intl/intl.dart';
+import 'package:permission_handler/permission_handler.dart';
 
 import '../bloc/weather_bloc.dart';
 
@@ -20,11 +22,14 @@ class _WeatherScreenState extends State<WeatherScreen>
  String _cityName = 'bengaluru';
  AnimationController _fadeController;
  Animation<double> _fadeAnimation;
+ WeatherBloc _weatherBloc;
 
  @override
  void initState() {
  super.initState();
 
+ _weatherBloc = BlocProvider.of<WeatherBloc>(context);
+
  _fetchWeatherWithLocation().catchError((error) {
  _fetchWeatherWithCity();
  });
@@ -210,52 +215,59 @@ class _WeatherScreenState extends State<WeatherScreen>
  }
 
  _fetchWeatherWithCity() {
- BlocProvider.of<WeatherBloc>(context)
- .add(FetchWeather(cityName: _cityName));
+ _weatherBloc.add(FetchWeather(cityName: _cityName));
  }
 
  _fetchWeatherWithLocation() async {
- // var permissionHandler = PermissionHandler();
- // var permissionResult = await permissionHandler
- // .requestPermissions([PermissionGroup.locationWhenInUse]);
+ var permissionResult = await Permission.locationWhenInUse.status;
+
+ switch (permissionResult) {
+ case PermissionStatus.restricted:
+ case PermissionStatus.permanentlyDenied:
+ print('location permission denied');
+ _showLocationDeniedDialog();
+ break;
 
- // switch (permissionResult[PermissionGroup.locationWhenInUse]) {
- // case PermissionStatus.denied:
- // case PermissionStatus.unknown:
- // print('location permission denied');
- // _showLocationDeniedDialog(permissionHandler);
- // throw Error();
- // }
+ case PermissionStatus.denied:
+ await Permission.locationWhenInUse.request();
+ _fetchWeatherWithLocation();
+ break;
 
- // Position position = await Geolocator()
- // .getCurrentPosition(desiredAccuracy: LocationAccuracy.low);
- // _weatherBloc.dispatch(FetchWeather(
- // longitude: position.longitude, latitude: position.latitude));
+ case PermissionStatus.limited:
+ case PermissionStatus.granted:
+ Position position = await Geolocator.getCurrentPosition(
+ desiredAccuracy: LocationAccuracy.low);
+
+ _weatherBloc.add(FetchWeather(
+ longitude: position.longitude,
+ latitude: position.latitude,
+ ));
+ break;
+ }
  }
 
  void _showLocationDeniedDialog() {
- //(PermissionHandler permissionHandler) {
- // showDialog(
- // context: context,
- // barrierDismissible: true,
- // builder: (BuildContext context) {
- // return AlertDialog(
- // backgroundColor: Colors.white,
- // title: Text('Location is disabled :(',
- // style: TextStyle(color: Colors.black)),
- // actions: <Widget>[
- // FlatButton(
- // child: Text(
- // 'Enable!',
- // style: TextStyle(color: Colors.green, fontSize: 16),
- // ),
- // onPressed: () {
- // permissionHandler.openAppSettings();
- // Navigator.of(context).pop();
- // },
- // ),
- // ],
- // );
- // });
+ showDialog(
+ context: context,
+ barrierDismissible: true,
+ builder: (BuildContext context) {
+ return AlertDialog(
+ backgroundColor: Colors.white,
+ title: Text('Location is disabled :(',
+ style: TextStyle(color: Colors.black)),
+ actions: <Widget>[
+ FlatButton(
+ child: Text(
+ 'Enable!',
+ style: TextStyle(color: Colors.green, fontSize: 16),
+ ),
+ onPressed: () {
+ openAppSettings();
+ Navigator.of(context).pop();
+ },
+ ),
+ ],
+ );
+ });
  }
 }