Markierungs-Clustering
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In diesem Beispiel wird eine Gruppe von Markierungen in der Nähe als Cluster definiert, damit sie auf der Karte bei Bedarf zu einer einzelnen Markierung zusammengefasst werden können.
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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';
/// Defines a group of nearby markers as a cluster so that the map can
/// collapse them into a single marker when appropriate.
class ClustersSample extends StatelessWidget {
ClustersSample({super.key});
final ClusterManager _myCluster = ClusterManager(
clusterManagerId: ClusterManagerId('my cluster'),
);
@override
Widget build(BuildContext context) {
return GoogleMap(
initialCameraPosition: CameraPosition(target: LatLng(0, 0)),
// You have to supply the list of clusters that are referred to
// by the map's markers.
//
// Note: For clusters to work on the web, you *must* import an additional
// JavaScript library. Read the web README for info:
// https://pub.dev/packages/google_maps_flutter_web
clusterManagers: {_myCluster},
markers: {
// Google Maps will smartly cluster markers with the same
// clusterManagerId. When zoomed in close enough, the cluster will
// break up into individual markers.
Marker(
markerId: MarkerId('in 1'),
position: LatLng(6.51, 3.37),
clusterManagerId: _myCluster.clusterManagerId,
),
Marker(
markerId: MarkerId('in 2'),
position: LatLng(6.64, 3.52),
clusterManagerId: _myCluster.clusterManagerId,
),
Marker(
markerId: MarkerId('in 3'),
position: LatLng(6.46, 3.58),
clusterManagerId: _myCluster.clusterManagerId,
),
Marker(
markerId: MarkerId('in 4'),
position: LatLng(6.85, 3.63),
clusterManagerId: _myCluster.clusterManagerId,
),
// Markers without a clusterManagerId will always show independently.
Marker(markerId: MarkerId('out'), position: LatLng(5.31, -3.99)),
},
);
}
}
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: 2025-09-03 (UTC).
[null,null,["Zuletzt aktualisiert: 2025-09-03 (UTC)."],[],[],null,["# Cluster markers\n\nThis example defines a group of nearby markers as a cluster so that the map can collapse them into a single marker when appropriate.\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/// Defines a group of nearby markers as a cluster so that the map can\n/// collapse them into a single marker when appropriate.\nclass ClustersSample extends StatelessWidget {\n ClustersSample({super.key});\n\n final ClusterManager _myCluster = ClusterManager(\n clusterManagerId: ClusterManagerId('my cluster'),\n );\n\n @override\n Widget build(BuildContext context) {\n return GoogleMap(\n initialCameraPosition: CameraPosition(target: LatLng(0, 0)),\n\n // You have to supply the list of clusters that are referred to\n // by the map's markers.\n //\n // Note: For clusters to work on the web, you *must* import an additional\n // JavaScript library. Read the web README for info:\n // https://pub.dev/packages/google_maps_flutter_web\n clusterManagers: {_myCluster},\n markers: {\n // Google Maps will smartly cluster markers with the same\n // clusterManagerId. When zoomed in close enough, the cluster will\n // break up into individual markers.\n Marker(\n markerId: MarkerId('in 1'),\n position: LatLng(6.51, 3.37),\n clusterManagerId: _myCluster.clusterManagerId,\n ),\n Marker(\n markerId: MarkerId('in 2'),\n position: LatLng(6.64, 3.52),\n clusterManagerId: _myCluster.clusterManagerId,\n ),\n Marker(\n markerId: MarkerId('in 3'),\n position: LatLng(6.46, 3.58),\n clusterManagerId: _myCluster.clusterManagerId,\n ),\n Marker(\n markerId: MarkerId('in 4'),\n position: LatLng(6.85, 3.63),\n clusterManagerId: _myCluster.clusterManagerId,\n ),\n\n // Markers without a clusterManagerId will always show independently.\n Marker(markerId: MarkerId('out'), position: LatLng(5.31, -3.99)),\n },\n );\n }\n}\nhttps://github.com/googlemaps-samples/flutter-maps-samples/blob/8f227e8b4d07179e5fb7cc5e8d8cb5440befd229/lib/samples/marker_clusters.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"]]