Map page

gistfile1.txt

import 'dart:async';
import 'package:flutter/cupertino.dart';
import 'package:flutter/services.dart';
import 'package:google_maps_flutter/google_maps_flutter.dart';
import 'package:location/location.dart';
import '../services/promotion.dart';

class MapPage extends StatefulWidget {
  @override
  State<StatefulWidget> createState() => new _MapPageState();
}

class _MapPageState extends State<MapPage> {
  Completer<GoogleMapController> _controller = Completer();
  final Set<Marker> _markers = {};
  bool _isLoading = false;

  LocationData _startLocation;
  LocationData _currentLocation;

  StreamSubscription<LocationData> _locationSubscription;

  Location _locationService = new Location();
  bool _permission = false;
  String error;
  PromotionService _promotionService;

  @override
  void initState() {
    //super.initState();
    print('init');
    _promotionService = PromotionService();
    initPlatformState();
  }

  getStores(String latitude, String longitude) {
    _isLoading = true;
    _promotionService.getStores(latitude, longitude).then((result) {
      _isLoading = false;
      // print((result));
      for (final i in result["data"]) {
        // print('$i');
        var latitude = double.parse(i["coords"]["latitude"]);
        var longitude = double.parse(i["coords"]["longitude"]);
        setState(() {
          _markers.add(Marker(
              // This marker id can be anything that uniquely identifies each marker.
              markerId: MarkerId(i["key"]),
              position: LatLng(latitude, longitude),
              infoWindow: InfoWindow(
                title: i["business_name"],
                snippet: i["addreess"],
              ),
              icon: BitmapDescriptor.defaultMarker));
        });
      }
    }).catchError((onError) {
      _isLoading = false;
      print(onError);
    });
  }

  initPlatformState() async {
    await _locationService.changeSettings(
        accuracy: LocationAccuracy.HIGH, interval: 1000);

    LocationData location;
    // Platform messages may fail, so we use a try/catch PlatformException.
    try {
      bool serviceStatus = await _locationService.serviceEnabled();
      print("Service status: $serviceStatus");
      if (serviceStatus) {
        _permission = await _locationService.requestPermission();
        print("Permission: $_permission");
        if (_permission) {
          location = await _locationService.getLocation();
          String latitude = location.latitude.toString();   
          String longitude = location.longitude.toString();

          print('$latitude $longitude');   
          getStores(latitude, longitude);
        }
      } else {
        bool serviceStatusResult = await _locationService.requestService();
        print("Service status activated after request: $serviceStatusResult");
        if (serviceStatusResult) {
          initPlatformState();
        }
      }
    } on PlatformException catch (e) {
      print(e);
      if (e.code == 'PERMISSION_DENIED') {
        error = e.message;
      } else if (e.code == 'SERVICE_STATUS_ERROR') {
        error = e.message;
      }
      location = null;
    }

    setState(() {
      _startLocation = location;
    });
  }

  static final CameraPosition _kGooglePlex = CameraPosition(
    target: LatLng(4.672414, -74.063829),
    zoom: 14.4746,
  );

  @override
  Widget build(BuildContext context) {
    return new CupertinoPageScaffold(
        navigationBar: CupertinoNavigationBar(
          padding: new EdgeInsetsDirectional.only(start: 10.0, end: 20.0),
          backgroundColor: new Color.fromRGBO(148, 3, 123, 1.0),
          middle: new Text('Mapa', style: new TextStyle(color: CupertinoColors.white, fontFamily: 'Raleway', letterSpacing: 1),),
        ),
        child: Stack(
          children: <Widget>[_showMap(), _showCircularProgress()],
        ));
  }

  Widget _showMap() {
    return Container(
      height: MediaQuery.of(context).size.height - 118,
      child: GoogleMap(
        mapType: MapType.normal,
        initialCameraPosition: _kGooglePlex,
        onMapCreated: (GoogleMapController controller) {
          _controller.complete(controller);
        },
        markers: _markers,
      ),
    );
  }

  Widget _showCircularProgress() {
    if (_isLoading) {
      return Center(
          child: CupertinoActivityIndicator(
        animating: true,
        radius: 15.0,
      ));
    }
    return Container(height: 0.0, width: 0.0);
  }
}