Google Maps for Flutter

A Flutter plugin that provides a Google Maps widget.

Usage

To use this plugin, add google_maps_flutter as a dependency in your pubspec.yaml file.

Getting Started

• 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 Google Maps for Web, enable the “Maps JavaScript API”.
  • Make sure the APIs you enabled are under the “Enabled APIs” section.

For more details, see Getting started with Google Maps Platform.

Android

1. Set the minSdkVersion in android/app/build.gradle:

android {
    defaultConfig {
        minSdkVersion 20
    }
}

This means that app will only be available for users that run Android SDK 20 or higher.

2. 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"/>

Display Mode

The Android implementation supports multiple platform view display modes. For details, see the Android README.

Cloud-based map styling

Cloud-based map styling works on Android only if AndroidMapRenderer.latest map renderer has been initialized. For details, see the Android README.

iOS

To set up, 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];
}
@end

Or 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

You'll need to modify the web/index.html file of your Flutter Web application to include the Google Maps JS SDK.

Check the google_maps_flutter_web README for the latest information on how to prepare your App to use Google Maps on the web.

All

You can now add a GoogleMap widget to your widget tree.

The map view can be controlled with the GoogleMapController that is passed to the GoogleMap's onMapCreated callback.

The GoogleMap widget should be used within a widget with a bounded size. Using it in an unbounded widget will cause the application to throw a Flutter exception.

Sample Usage

class MapSample extends StatefulWidget {
  const MapSample({super.key});

  @override
  State<MapSample> createState() => MapSampleState();
}

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

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

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

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

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

See the example directory for a complete sample app.