map flutter code example

Example 1: flutter get key from map

String key = values.keys.elementAt(index);

Example 2: Map in dart

void main() { 
   var details = new Map(); 
   details['Usrname'] = 'admin'; 
   details['Password'] = 'admin@123'; 
   print(details); 
} 

// Output
// {Usrname: admin, Password: admin@123}

Example 3: flutter google map

import 'dart:async';

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

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Google Maps Demo',
      home: MapSample(),
    );
  }
}

class MapSample extends StatefulWidget {
  @override
  State<MapSample> createState() => MapSampleState();
}

class MapSampleState extends State<MapSample> {
  Completer<GoogleMapController> _controller = Completer();

  static final CameraPosition _kGooglePlex = CameraPosition(
    target: LatLng(37.42796133580664, -122.085749655962),
    zoom: 14.4746,
  );

  static final CameraPosition _kLake = CameraPosition(
      bearing: 192.8334901395799,
      target: LatLng(37.43296265331129, -122.08832357078792),
      tilt: 59.440717697143555,
      zoom: 19.151926040649414);

  @override
  Widget build(BuildContext context) {
    return new Scaffold(
      body: GoogleMap(
        mapType: MapType.hybrid,
        initialCameraPosition: _kGooglePlex,
        onMapCreated: (GoogleMapController controller) {
          _controller.complete(controller);
        },
      ),
      floatingActionButton: FloatingActionButton.extended(
        onPressed: _goToTheLake,
        label: Text('To the lake!'),
        icon: Icon(Icons.directions_boat),
      ),
    );
  }

  Future<void> _goToTheLake() async {
    final GoogleMapController controller = await _controller.future;
    controller.animateCamera(CameraUpdate.newCameraPosition(_kLake));
  }
}

Example 4: get value from map with key flutter

String value = myMap["mykey"];

Example 5: flutter map

Widget build(BuildContext context) {
  return FlutterMap(
    options: MapOptions(
      center: LatLng(51.5, -0.09),
      zoom: 13.0,
    ),
    layers: [
      TileLayerOptions(
        urlTemplate: "https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png",
        subdomains: ['a', 'b', 'c']
      ),
      MarkerLayerOptions(
        markers: [
          Marker(
            width: 80.0,
            height: 80.0,
            point: LatLng(51.5, -0.09),
            builder: (ctx) =>
            Container(
              child: FlutterLogo(),
            ),
          ),
        ],
      ),
    ],
  );
}