Map With Custom Bitmaps /Icons

MapWithCustomBitmaps.dart

import 'package:android_intent/android_intent.dart';
import 'package:flutter/material.dart';
import 'package:flutter/cupertino.dart';
import 'package:geolocator/geolocator.dart';
import 'package:google_maps_flutter/google_maps_flutter.dart';
import 'package:mccu_family/controllers/core/scoped.dart';
import 'package:permission/permission.dart';

import 'dart:async';
import 'package:scoped_model/scoped_model.dart';

class MapSample extends StatefulWidget {
  final double lat;
  final double long;
  MapSample({this.lat, this.long});

  @override
  State<MapSample> createState() => MapSampleState();
}

class MapSampleState extends State<MapSample> {
  Completer<GoogleMapController> _controller = Completer();
  List<Marker> markers = [];
  BitmapDescriptor sourceIcon;
  BitmapDescriptor destinationIcon;

  Future reqPermission() async {
    var permissions = await Permission.getPermissionsStatus(
        [PermissionName.Location, PermissionName.Internet]);
    if (permissions[0].permissionStatus == PermissionStatus.notAgain) {
      await Permission.requestPermissions([PermissionName.Location]);
      _checkGps();
    } else {
      await Permission.requestPermissions([PermissionName.Location]);
      _checkGps();
    }
  }

  var _geoLocator = Geolocator();
  var long;
  var lat;

  getLocation() async {
    _geoLocator
        .getPositionStream((LocationOptions(
            accuracy: LocationAccuracy.high, distanceFilter: 1)))
        .listen((position) async {
      setState(() {
        print(position);
        lat = position.latitude;
        long = position.longitude;

        // Toast.show("${placemark[0].country}", context);
      });
    });

    // Toast.show("${placemark[0].country}", context);

    // StreamSubscription<Position> positionStream =
    //     _geoLocator.getPositionStream().listen((Position position) {
    //   setState(() {
    //     positionStream1 = position.latitude;
    //     position2 = position.longitude;
    //     speed = position.speed;
    //     alt = position.altitude;
    //   });
    //   //  Toast.show("${position.latitude.toString()}", context);
    // });
  }

  Future _checkGps() async {
    if (!(await Geolocator().isLocationServiceEnabled())) {
      if (Theme.of(context).platform == TargetPlatform.android) {
        showDialog(
          context: context,
          builder: (BuildContext context) {
            return CupertinoAlertDialog(
              title: Text("Can't get Current location"),
              content:
                  const Text('Please make sure you enable GPS and try again'),
              actions: <Widget>[
                FlatButton(
                  child: Text('Ok'),
                  onPressed: () {
                    final AndroidIntent intent = AndroidIntent(
                        action: 'android.settings.LOCATION_SOURCE_SETTINGS');

                    intent.launch();
                    Navigator.of(context, rootNavigator: true).pop();
                  },
                ),
              ],
            );
          },
        );
      }
    }
  }

  void setSourceAndDestinationIcons() async {
    sourceIcon = await BitmapDescriptor.fromAssetImage(
        ImageConfiguration(devicePixelRatio: 0.5),
        'lib/assets/driving_pin.png');
    destinationIcon = await BitmapDescriptor.fromAssetImage(
        ImageConfiguration(devicePixelRatio: 0.5),
        'lib/assets/destination_map_marker.png');
  }

  @override
  void initState() {
    // TODO: implement initState
    super.initState();
    //reqPermission();
    reqPermission().then((r) async {
      return getLocation();
      // await AndroidIntent(action: 'action_location_source_settings')
      //     .launch()
      //     .then((r) {
      //   getLocation();
      // });
    });
    // widget.model.generateCorinates(
    //     data: widget.model.deviceTrips[widget.index].positions);

    setSourceAndDestinationIcons();
    //setMapPins();
  }

  @override
  Widget build(BuildContext context) {
    return ScopedModelDescendant(
      builder: (BuildContext context, Widget child, Scoped model) {
        return new Scaffold(
          body: lat == null || long == null
              ? Center(
                  child: Column(
                    mainAxisAlignment: MainAxisAlignment.center,
                    crossAxisAlignment: CrossAxisAlignment.center,
                    children: <Widget>[
                      Padding(
                        padding: const EdgeInsets.all(8.0),
                        child: CircularProgressIndicator(),
                      ),
                      Text(
                        "Loading Map Co-Ordinates ...",
                        style: TextStyle(
                            color: Colors.blueAccent,
                            fontWeight: FontWeight.w900),
                      )
                    ],
                  ),
                )
              : GoogleMap(
                  mapType: MapType.normal,
                  mapToolbarEnabled: true,
                  markers: Set.from(markers),
                  myLocationButtonEnabled: true,
                  zoomGesturesEnabled: true,
                  myLocationEnabled: true,
                  compassEnabled: true,
                  scrollGesturesEnabled: true,
                  initialCameraPosition: CameraPosition(
                    target: LatLng(lat, long),
                    zoom: 15.5,
                  ),
                  polylines: model.polyline,
                  onMapCreated: (GoogleMapController controller) {
                    //  controller.setMapStyle(Utils.mapStyles);

                    setMapPins();
                    model.polyline.add(Polyline(
                      width: 5,
                      polylineId: PolylineId("Car Route"),
                      visible: true,
                      points: [
                        LatLng(lat, long),
                        LatLng(widget.lat, widget.long)
                      ],
                      color: Colors.blueAccent,
                    ));
                    _controller.complete(controller);
                  },
                ),
          // floatingActionButton: FloatingActionButton.extended(
          //   onPressed: _goToTheLake,
          //   label: Text('Go Last Location'),
          //   icon: Icon(Icons.directions_boat),
          // ),
        );
      },
    );
  }

  void setMapPins() {
    setState(() {
      // source pin
      markers.add(Marker(
          onTap: () {},
          draggable: false,
          markerId: MarkerId('sourcePin'),
          position: LatLng(lat, long),
          infoWindow:
              InfoWindow(title: "Your Position", snippet: "Keep On Moving"),
          icon: sourceIcon));
      // destination pin
      markers.add(Marker(
          markerId: MarkerId('destPin'),
          position: LatLng(widget.lat, widget.long),
          infoWindow:
              InfoWindow(title: "Destination", snippet: "You Are There"),
          icon: destinationIcon));
    });
  }
}