Flutter geolocation not showing anything

I am new to flutter and trying to create a geolocation. however, for my following code, the screen only shows 'Loading.. Please wait..' and the map is not showing.

i am just trying to show the current location using dependencies

geolocator: ^6.1.1

Using the codes from

https://codelabs.developers.google.com/codelabs/google-maps-in-flutter#3

the Google map can be shown successfully. So it is not issues related to Google Maps Platform.

// home.dart
import 'package:flutter/material.dart';
import 'package:google_maps_flutter/google_maps_flutter.dart';
import 'package:geolocator/geolocator.dart';

class Home extends StatefulWidget {
  @override
  _HomeState createState() => _HomeState();
}

class _HomeState extends State<Home> {
  bool mapToggle = false;
  var currentLocation;
  GoogleMapController mapController;

  @override
  void initState() {
    // TODO: implement initState
    super.initState();
    Geolocator.getCurrentPosition().then((currloc) {
      setState(() {
        currentLocation = currloc;
        mapToggle = true;
      });
    });
  }

  void _onMapCreated(controller) {
    setState(() {
      mapController = controller;
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Home'),
      ),
      body: Column(children: <Widget>[
        Stack(
          children: <Widget>[
            Container(
                height: MediaQuery.of(context).size.height - 80.0,
                width: double.infinity,
                child: mapToggle
                    ? GoogleMap(
                        onMapCreated: _onMapCreated,
                        initialCameraPosition: CameraPosition(
                            target: LatLng(currentLocation.latitude,
                                currentLocation.longitude),
                            zoom: 10.0))
                    : Center(
                        child: Text(
                        'Loading.. Please wait..',
                        style: TextStyle(fontSize: 20.0),
                      )))
          ],
        )
      ]),
    );
  }
}

In your AndroidManifest add permission

<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />

initialize variable

Position _currentPosition;

Copy this function and call this in initState

_getCurrentLocation() async{
   Geolocator.getCurrentPosition(desiredAccuracy: LocationAccuracy.best)
        .then((Position position) {
      setState(() {
        _currentPosition = position;
     
      });

    
    }).catchError((e) {
      print(e);
    });
  }

For more info checkout their pub.dev site geolocatorunder usage,make sure you setup correctly for android and ios