how to get geolocation in flutter

Question

I'm using geolocator: ^6.1.1 in flutter I have 2 codes here the first work with no problem

    Position position = await Geolocator.getLastKnownPosition();

but I'm trying to use the current location not the last known and this dont work

    Position position = await Geolocator.getCurrentPosition();

please explain the problem to me, and here is my full code

void _getCurrentLocation() async {
    print('start geo');
    Position position = await Geolocator.getLastKnownPosition();
    // Position position = await Geolocator.getCurrentPosition();
    print(position);
  }

and here is my log

I/flutter (27711): start geo
E/flutter (27711): [ERROR:flutter/lib/ui/ui_dart_state.cc(177)] Unhandled Exception: PlatformException(error, java.lang.Integer cannot be cast to java.lang.String, null, java.lang.ClassCastException: java.lang.Integer cannot be cast to java.la
ng.String
E/flutter (27711):      at com.baseflow.geolocator.location.LocationOptions.parseArguments(LocationOptions.java:11)
E/flutter (27711):      at com.baseflow.geolocator.MethodCallHandlerImpl.onGetCurrentPosition(MethodCallHandlerImpl.java:163)
E/flutter (27711):      at com.baseflow.geolocator.MethodCallHandlerImpl.onMethodCall(MethodCallHandlerImpl.java:65)
E/flutter (27711):      at io.flutter.plugin.common.MethodChannel$IncomingMethodCallHandler.onMessage(MethodChannel.java:233)
E/flutter (27711):      at io.flutter.embedding.engine.dart.DartMessenger.handleMessageFromDart(DartMessenger.java:85)
E/flutter (27711):      at io.flutter.embedding.engine.FlutterJNI.handlePlatformMessage(FlutterJNI.java:692)
E/flutter (27711):      at android.os.MessageQueue.nativePollOnce(Native Method)
E/flutter (27711):      at android.os.MessageQueue.next(MessageQueue.java:379)
E/flutter (27711):      at android.os.Looper.loop(Looper.java:144)
E/flutter (27711):      at android.app.ActivityThread.main(ActivityThread.java:7529)
E/flutter (27711):      at java.lang.reflect.Method.invoke(Native Method)
E/flutter (27711):      at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:245)
E/flutter (27711):      at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:921)
E/flutter (27711): )
E/flutter (27711): #0      MethodChannelGeolocator._handlePlatformException (package:geolocator_platform_interface/src/implementations/method_channel_geolocator.dart:204)
E/flutter (27711): #1      MethodChannelGeolocator.getCurrentPosition (package:geolocator_platform_interface/src/implementations/method_channel_geolocator.dart:121)
E/flutter (27711): <asynchronous suspension>
E/flutter (27711): #2      _AddNewWashState._getCurrentLocation (package:drsteam/UI/AddNewWash.dart:62)
E/flutter (27711): <asynchronous suspension>
E/flutter (27711):

Position position = await Geolocator().getCurrentPosition(desiredAccuracy: LocationAccuracy.best); Try this — Ashok, Oct 31 '20 at 17:56
didn't work both of Position position = await Geolocator().getCurrentPosition(desiredAccuracy: LocationAccuracy.best); or Position position = await Geolocator.getCurrentPosition(desiredAccuracy: LocationAccuracy.best); — Husamuldeen, Oct 31 '20 at 18:45

score 0 · Answer 1 · answered Oct 31 '20 at 17:53

We can do that by creating an instance of Geolocator and calling getCurrentPosition

import 'package:geolocator/geolocator.dart';

class YourPage extends StatefulWidget {
  @override
  _YourPageState createState() => _YourPageState();
}

class _YourPageState extends State<YourPage> {
  Position _currentPosition;

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Center(
        child: Column(
          children: <Widget>[
            if (_currentPosition != null)
              Text(
                  "LAT: ${_currentPosition.latitude}, LNG: ${_currentPosition.longitude}"),
            FlatButton(
              onPressed: () {
                _getCurrentLocation();
              },
            ),
          ],
        ),
      ),
    );
  }

  _getCurrentLocation() {
    final Geolocator geolocator = Geolocator()..forceAndroidLocationManager;

    geolocator
        .getCurrentPosition(desiredAccuracy: LocationAccuracy.best)
        .then((Position position) {
      setState(() {
        _currentPosition = position;
      });
    }).catchError((e) {
      print(e);
    });
  }
}

final Geolocator geolocator = Geolocator()..forceAndroidLocationManager; this didn't work according to that the android refusd geolocator.getCurrentPosition and accept Geolocator.getCurrentPosition I run the code and didn't work — Husamuldeen, Oct 31 '20 at 18:37

score 0 · Answer 2 · answered Nov 01 '20 at 06:00

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;

Current Location Function

_getCurrentLocation() async {

    final snackBar = SnackBar(
      content: Row(
        children: [
          Text("Locating....    ",style: TextStyle(fontSize: 16),),
          Container(height: 20, width: 20, child: CircularProgressIndicator()),
        ],
      ),
      backgroundColor: Colors.greenAccent[700],
    );
    _scaffoldKey.currentState.showSnackBar(snackBar);


    await Geolocator.getCurrentPosition(desiredAccuracy: LocationAccuracy.best)
        .then((Position position) {
      setState(() {
        _currentPosition = position;
       print(_currentPosition .latitude);
       print(_currentPosition .longitude);

        final snackBar = SnackBar(content: Text("Located 
        Successfully"),backgroundColor: Colors.greenAccent[700],
        );
        _scaffoldKey.currentState.showSnackBar(snackBar);

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

Call this function in button or in initState(),If above problem occurs just restart the phone After that uninstall the app then run flutter clean and run again

how to get geolocation in flutter

2 Answers2

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