Markierung auf einer Karte einfügen
Mit Sammlungen den Überblick behalten
Sie können Inhalte basierend auf Ihren Einstellungen speichern und kategorisieren.

In diesem Beispiel wird gezeigt, wie Sie benutzerdefinierte Bitmaps für Kartenmarkierungen verwenden.
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';
/// Shows advanced options of markers.
class CustomMarkerSample extends StatefulWidget {
const CustomMarkerSample({super.key});
@override
State<CustomMarkerSample> createState() => _CustomMarkerSampleState();
}
class _CustomMarkerSampleState extends State<CustomMarkerSample> {
late Marker _marker = Marker(
markerId: MarkerId('my_marker'),
// Start with the default Google Maps pin, except yellow.
// (Note: Hue isn't supported on all platforms.)
icon: BitmapDescriptor.defaultMarkerWithHue(BitmapDescriptor.hueYellow),
onTap: _changeIcon,
);
@override
Widget build(BuildContext context) {
return GoogleMap(
initialCameraPosition: CameraPosition(target: LatLng(0, 0)),
markers: {_marker},
);
}
void _changeIcon() async {
// Set up the image configuration for the new icon, including its size.
final imageConfiguration = createLocalImageConfiguration(
context,
size: Size(42, 52),
);
// Load the icon image from an asset.
// Alternatively, you can create the icon with BitmapDescriptor.bytes(),
// which allows loading from network or using a CustomPainter.
final assetIcon = await BitmapDescriptor.asset(
imageConfiguration,
'assets/icon_flutter.png',
);
setState(() {
// Modify the existing marker with the new icon and set its anchor
// to center.
_marker = _marker.copyWith(
iconParam: assetIcon,
anchorParam: const Offset(0.5, 0.5),
);
});
}
}
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,["# Add a marker to a map\n\nThis example demonstrates how to use custom bitmaps for map markers.\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/// Shows advanced options of markers.\nclass CustomMarkerSample extends StatefulWidget {\n const CustomMarkerSample({super.key});\n\n @override\n State\u003cCustomMarkerSample\u003e createState() =\u003e _CustomMarkerSampleState();\n}\n\nclass _CustomMarkerSampleState extends State\u003cCustomMarkerSample\u003e {\n late Marker _marker = Marker(\n markerId: MarkerId('my_marker'),\n // Start with the default Google Maps pin, except yellow.\n // (Note: Hue isn't supported on all platforms.)\n icon: BitmapDescriptor.defaultMarkerWithHue(BitmapDescriptor.hueYellow),\n onTap: _changeIcon,\n );\n\n @override\n Widget build(BuildContext context) {\n return GoogleMap(\n initialCameraPosition: CameraPosition(target: LatLng(0, 0)),\n markers: {_marker},\n );\n }\n\n void _changeIcon() async {\n // Set up the image configuration for the new icon, including its size.\n final imageConfiguration = createLocalImageConfiguration(\n context,\n size: Size(42, 52),\n );\n\n // Load the icon image from an asset.\n // Alternatively, you can create the icon with BitmapDescriptor.bytes(),\n // which allows loading from network or using a CustomPainter.\n final assetIcon = await BitmapDescriptor.asset(\n imageConfiguration,\n 'assets/icon_flutter.png',\n );\n\n setState(() {\n // Modify the existing marker with the new icon and set its anchor\n // to center.\n _marker = _marker.copyWith(\n iconParam: assetIcon,\n anchorParam: const Offset(0.5, 0.5),\n );\n });\n }\n}\nhttps://github.com/googlemaps-samples/flutter-maps-samples/blob/8f227e8b4d07179e5fb7cc5e8d8cb5440befd229/lib/samples/marker_custom.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"]]