Polylinien auf einer Karte zeichnen
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Dieses Beispiel zeigt eine Karte des Nordatlantiks mit der Route der Titanic.
Jetzt starten
Bevor Sie den Beispielcode ausprobieren können, müssen Sie Ihre Entwicklungsumgebung konfigurieren.
Weitere Informationen finden Sie unter Flutter-Projekt einrichten.
Code ansehen
Dart
// Copyright 2025 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
import 'package:flutter/material.dart';
import 'package:google_maps_flutter/google_maps_flutter.dart';
/// Displays a map of the North Atlantic Ocean with the route of the Titanic
/// marked on it.
class PolylinesSample extends StatelessWidget {
const PolylinesSample({super.key});
@override
Widget build(BuildContext context) {
return GoogleMap(
initialCameraPosition: CameraPosition(target: LatLng(49, -23)),
polylines: {
Polyline(
// Polyline id must be unique.
polylineId: PolylineId('titanic route'),
points: [
LatLng(50.90, -1.41), // Southampton
LatLng(49.65, -1.60), // Cherbourg
LatLng(49.77, -6.71),
LatLng(51.83, -8.28), // Cobh
LatLng(50.96, -8.58),
LatLng(41.75, -49.90), // Wreck
],
width: 5,
color: Colors.red,
geodesic: true,
// Custom caps and joint types aren't supported on all platforms.
startCap: Cap.roundCap,
endCap: Cap.roundCap,
jointType: JointType.round,
consumeTapEvents: true,
onTap: () => debugPrint('clicked route'),
),
},
);
}
}
Nächste Schritte
Die vollständigen Beispiele finden Sie auf GitHub:
Auf GitHub ansehen
Alternativ können Sie die gesamte Sammlung von Samples klonen, um sie lokal auszuführen. Führen Sie dazu die folgenden Befehle aus:
git clone -b flutter_samples https://github.com/googlemaps-samples/flutter-maps-samples.git
cd flutter-samples
flutter pub get
Sofern nicht anders angegeben, sind die Inhalte dieser Seite unter der Creative Commons Attribution 4.0 License und Codebeispiele unter der Apache 2.0 License lizenziert. Weitere Informationen finden Sie in den Websiterichtlinien von Google Developers. Java ist eine eingetragene Marke von Oracle und/oder seinen Partnern.
Zuletzt aktualisiert: 2025-09-04 (UTC).
[null,null,["Zuletzt aktualisiert: 2025-09-04 (UTC)."],[],[],null,["# Draw polylines on a map\n\nThis example displays a map of the North Atlantic Ocean with the route of the Titanic drawn on it.\n\nGet started\n-----------\n\nBefore you can try the sample code, you must configure your development environment.\nFor more information, see [Set up a Flutter project](/maps/flutter-package/config).\n\nView the code\n-------------\n\n### Dart\n\n```python\n// Copyright 2025 Google LLC\n//\n// Licensed under the Apache License, Version 2.0 (the \"License\");\n// you may not use this file except in compliance with the License.\n// You may obtain a copy of the License at\n//\n// https://www.apache.org/licenses/LICENSE-2.0\n//\n// Unless required by applicable law or agreed to in writing, software\n// distributed under the License is distributed on an \"AS IS\" BASIS,\n// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n// See the License for the specific language governing permissions and\n// limitations under the License.\n\nimport 'package:flutter/material.dart';\nimport 'package:google_maps_flutter/google_maps_flutter.dart';\n\n/// Displays a map of the North Atlantic Ocean with the route of the Titanic\n/// marked on it.\nclass PolylinesSample extends StatelessWidget {\n const PolylinesSample({super.key});\n\n @override\n Widget build(BuildContext context) {\n return GoogleMap(\n initialCameraPosition: CameraPosition(target: LatLng(49, -23)),\n polylines: {\n Polyline(\n // Polyline id must be unique.\n polylineId: PolylineId('titanic route'),\n points: [\n LatLng(50.90, -1.41), // Southampton\n LatLng(49.65, -1.60), // Cherbourg\n LatLng(49.77, -6.71),\n LatLng(51.83, -8.28), // Cobh\n LatLng(50.96, -8.58),\n LatLng(41.75, -49.90), // Wreck\n ],\n width: 5,\n color: Colors.red,\n geodesic: true,\n // Custom caps and joint types aren't supported on all platforms.\n startCap: Cap.roundCap,\n endCap: Cap.roundCap,\n jointType: JointType.round,\n consumeTapEvents: true,\n onTap: () =\u003e debugPrint('clicked route'),\n ),\n },\n );\n }\n}\nhttps://github.com/googlemaps-samples/flutter-maps-samples/blob/8f227e8b4d07179e5fb7cc5e8d8cb5440befd229/lib/samples/polylines.dart\n \n```\n\nNext steps\n----------\n\nView the complete set of samples on GitHub:\n\n[View on GitHub](https://github.com/googlemaps-samples/flutter-maps-samples/tree/main/lib/samples)\n\nAlternatively, clone the full set of samples to run them locally by executing the following commands: \n\n git clone -b flutter_samples https://github.com/googlemaps-samples/flutter-maps-samples.git\n cd flutter-samples\n flutter pub get"]]