gistfile1.txt

import 'package:gps/gps.dart';
import 'package:flutter/material.dart';
import 'package:toast/toast.dart';
import 'package:geolocator/geolocator.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      title: 'SOS Help',
      theme: ThemeData(
        primarySwatch: Colors.red,
      ),
      home: MyHomePage(title: 'SOS Help'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key key, this.title}) : super(key: key);
  final String title;
  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  GpsLatlng latlng;
  List<Placemark> placemark;
  void initGps() async {
    var gps = await Gps.currentGps();
    this.latlng = gps;
    String temp = latlng.toString();
    String temp1="",temp2="";
    double lat,long;
    int i=0;
    while(temp[i]!=',')
      {
        temp1+=temp[i];
        i++;
      }
      i+=2;
      while(i!=temp.length)
        {
          temp2+=temp[i];
          i++;
        }
        lat=double.parse(temp1);
        long=double.parse(temp2);
        print(lat);
        print(long);
        placemark = await Geolocator().placemarkFromCoordinates(lat,long);
  }
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text("SOS"),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
          MaterialButton(
            color: Colors.red,
            minWidth: 100.0,
            height: 50.0,
            shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(24)),
            splashColor: Colors.redAccent,
            child: Text("SOS"
            ,style: TextStyle(color: Colors.white),),
             onPressed: ()
             {
              initGps();
              Toast.show(
                  "$placemark", context,
                  duration: Toast.LENGTH_LONG, gravity: Toast.BOTTOM); //When displaying, here it shows [Instance of 'Placemark']
             }
            )
          ],
        ),
      ),
       // This trailing comma makes auto-formatting nicer for build methods.
    );
  }
}