GoogleMapsWidget For Flutter
A widget for flutter developers to easily integrate google maps in their apps. It can be used to make polylines from a source to a destination, and also handle a driver's realtime location (if any) on the map.
- Make polylines (route) between two locations by providing the latitude and longitude for both the locations.
- The route is customizable in terms of color and width.
- The plugin also offers realtime location tracking for a driver(if any) and shows a marker on the map which updates everytimes the driver's location changes.
- All the markers are customizable.
- onTap callbacks are implemented for all the markers and their info windows to easily handle user interaction.
- Almost all the parameters defined in
google_maps_flutterfor theGoogleMapwidget can be passed as arguments to the widget.
-
Get an API key at https://cloud.google.com/maps-platform/.
-
Enable Google Map SDK for each platform.
- Go to Google Developers Console.
- Choose the project that you want to enable Google Maps on.
- Select the navigation menu and then select "Google Maps".
- Select "APIs" under the Google Maps menu.
- To enable Google Maps for Android, select "Maps SDK for Android" in the "Additional APIs" section, then select "ENABLE".
- To enable Google Maps for iOS, select "Maps SDK for iOS" in the "Additional APIs" section, then select "ENABLE".
- To enable Directions API, select "Directions API" in the "Additional APIs" section, then select "ENABLE".
- Make sure the APIs you enabled are under the "Enabled APIs" section.
For more details, see Getting started with Google Maps Platform.
Specify your API key in the application manifest android/app/src/main/AndroidManifest.xml:
<manifest ...
<application ...
<meta-data android:name="com.google.android.geo.API_KEY"
android:value="YOUR KEY HERE"/>Specify your API key in the application delegate ios/Runner/AppDelegate.m:
#include "AppDelegate.h"
#include "GeneratedPluginRegistrant.h"
#import "GoogleMaps/GoogleMaps.h"
@implementation AppDelegate
- (BOOL)application:(UIApplication *)application
didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
[GMSServices provideAPIKey:@"YOUR KEY HERE"];
[GeneratedPluginRegistrant registerWithRegistry:self];
return [super application:application didFinishLaunchingWithOptions:launchOptions];
}
@endOr in your swift code, specify your API key in the application delegate ios/Runner/AppDelegate.swift:
import UIKit
import Flutter
import GoogleMaps
@UIApplicationMain
@objc class AppDelegate: FlutterAppDelegate {
override func application(
_ application: UIApplication,
didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?
) -> Bool {
GMSServices.provideAPIKey("YOUR KEY HERE")
GeneratedPluginRegistrant.register(with: self)
return super.application(application, didFinishLaunchingWithOptions: launchOptions)
}
}Web (This package is a wrapper around the google_maps_flutter package. If that package supports web, this package will also support web.)
Modify web/index.html
Get an API Key for Google Maps JavaScript API. Get started here.
Modify the <head> tag of your web/index.html to load the Google Maps JavaScript API, like so:
<head>
<!-- // Other stuff -->
<script src="https://maps.googleapis.com/maps/api/js?key=YOUR_KEY_HERE"></script>
</head>To use this plugin, add google_maps_widget as a dependency in your pubspec.yaml file.
dependencies:
flutter:
sdk: flutter
google_maps_widget:First and foremost, import the widget.
import 'package:google_maps_widget/google_maps_widget.dart';You can now add a GoogleMapsWidget widget to your widget tree and pass all the required parameters to get started.
This widget will create a route between the source and the destination LatLng's provided.
GoogleMapsWidget(
apiKey: "YOUR KEY HERE",
sourceLatLng: LatLng(40.484000837597925, -3.369978368282318),
destinationLatLng: LatLng(40.48017307700204, -3.3618026599287987),
),One can create a controller and interact with the google maps controller, or update the source and destination LatLng's.
// can create a controller, and call methods to update source loc,
// destination loc, interact with the google maps controller to
// show/hide markers programmatically etc.
final mapsWidgetController = GlobalKey<GoogleMapsWidgetState>();Pass this controller to the key param in GoogleMapsWidget widget, and then
// call like this to update source or destination, this will also rebuild the route.
mapsWidgetController.currentState!.setSourceLatLng(
LatLng(
40.484000837597925 * (Random().nextDouble()),
-3.369978368282318,
),
);
// or, can interact with the google maps controller directly to focus on a marker etc..
final googleMapsCon = await mapsWidgetController.currentState!.getGoogleMapsController();
googleMapsCon.showMarkerInfoWindow(MarkerIconInfo.sourceMarkerId);Sample Usage
import 'dart:math';
import 'package:flutter/material.dart';
import 'package:google_maps_widget/google_maps_widget.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
// can create a controller, and call methods to update source loc,
// destination loc, interact with the google maps controller to
// show/hide markers programmatically etc.
final mapsWidgetController = GlobalKey<GoogleMapsWidgetState>();
@override
Widget build(BuildContext context) {
return MaterialApp(
home: SafeArea(
child: Scaffold(
body: Column(
children: [
Expanded(
child: GoogleMapsWidget(
apiKey: "YOUR GOOGLE MAPS API KEY HERE",
key: mapsWidgetController,
sourceLatLng: LatLng(
40.484000837597925,
-3.369978368282318,
),
destinationLatLng: LatLng(
40.48017307700204,
-3.3618026599287987,
),
///////////////////////////////////////////////////////
////////////// OPTIONAL PARAMETERS //////////////
///////////////////////////////////////////////////////
routeWidth: 2,
sourceMarkerIconInfo: MarkerIconInfo(
infoWindowTitle: "This is source name",
onTapInfoWindow: (_) {
print("Tapped on source info window");
},
assetPath: "assets/images/house-marker-icon.png",
),
destinationMarkerIconInfo: MarkerIconInfo(
assetPath: "assets/images/restaurant-marker-icon.png",
),
driverMarkerIconInfo: MarkerIconInfo(
infoWindowTitle: "Alex",
assetPath: "assets/images/driver-marker-icon.png",
onTapMarker: (currentLocation) {
print("Driver is currently at $currentLocation");
},
assetMarkerSize: Size.square(125),
rotation: 90,
),
updatePolylinesOnDriverLocUpdate: true,
onPolylineUpdate: (_) {
print("Polyline updated");
},
// mock stream
driverCoordinatesStream: Stream.periodic(
Duration(milliseconds: 500),
(i) => LatLng(
40.47747872288886 + i / 10000,
-3.368043154478073 - i / 10000,
),
),
totalTimeCallback: (time) => print(time),
totalDistanceCallback: (distance) => print(distance),
),
),
// demonstrates how to interact with the controller
Padding(
padding: const EdgeInsets.all(10),
child: Row(
children: [
Expanded(
child: ElevatedButton(
onPressed: () {
mapsWidgetController.currentState!.setSourceLatLng(
LatLng(
40.484000837597925 * (Random().nextDouble()),
-3.369978368282318,
),
);
},
child: Text('Update source'),
),
),
const SizedBox(width: 10),
Expanded(
child: ElevatedButton(
onPressed: () async {
final googleMapsCon = await mapsWidgetController
.currentState!
.getGoogleMapsController();
googleMapsCon.showMarkerInfoWindow(
MarkerIconInfo.sourceMarkerId,
);
},
child: Text('Show source info'),
),
),
],
),
),
],
),
),
),
);
}
}See the example directory for a complete sample app.
- GitHub: @rithik-dev
- LinkedIn: @rithik-bhandari