Google Maps for Flutter #

A Flutter plugin that provides a Google Maps widget.

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.