A Flutter packages that provides a wrapper around a Google Maps widget.
- Show a Google Map with 2 markers on it
- Calculate a Route between the two markers
- Update the route and route information with a set time interval
- Retrieve the travel distance and time
- Use custom styling for the map, markers and line
- Automatically center the view between the two markers
- Make all Google Maps settings available through the GoogleTrackTraceMap
Because this package uses Google Maps for the Map and the route calculation you need to follow the Flutter Google Maps guide:
-
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".
- Make sure the APIs you enabled are under the "Enabled APIs" section.
For more details, see Getting started with Google Maps Platform.
- Set the
minSdkVersioninandroid/app/build.gradle:
android {
defaultConfig {
minSdkVersion 20
}
}This means that app will only be available for users that run Android SDK 20 or higher.
- 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"/>This plugin requires iOS 9.0 or higher. 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];
}
@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)
}
}Add the following code in the 'head' of 'web/index.html':
<head>
<!-- // Other stuff -->
<script src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY"></script>
</head>class TrackTraceDemo extends StatefulWidget {
const TrackTraceDemo({Key? key}) : super(key: key);
@override
State<TrackTraceDemo> createState() => _TrackTraceDemoState();
}
class _TrackTraceDemoState extends State<TrackTraceDemo> {
TrackTraceController? controller;
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: (controller == null || controller!.route == null)
? const Text('TrackTrace example')
: Text(controller!.route!.duration.toString() +
' seconds, distance: ' +
(controller!.route!.distance / 1000).toString() +
' km')),
body: GoogleTrackTraceMap(
startPosition: const Marker(
markerId: MarkerId('Start location'),
position: LatLng(52.356057, 4.897540),
),
destinationPosition: const Marker(
markerId: MarkerId('Destination location'),
position: LatLng(52.364709, 4.877157)),
googleAPIKey: '', // put your own API key here
travelMode: TravelMode.bicycling,
routeUpdateInterval: 60,
timerPrecision: TimePrecision.everySecond,
zoomGesturesEnabled: true,
line: const Polyline(
polylineId: PolylineId('test route'),
color: Colors.purple,
width: 7,
),
onMapCreated: (ctr) => {
controller = ctr,
ctr.addListener(() {
setState(() {});
}),
},
),
);
}
}See the example directory for a complete sample app.