Cómo agregar un marcador a un mapa

En este ejemplo, se muestra cómo usar mapas de bits personalizados para los marcadores de mapas.

Comenzar

Antes de probar el código de muestra, debes configurar tu entorno de desarrollo. Para obtener más información, consulta Cómo configurar un proyecto de Flutter.

Consulta el código

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),
      );
    });
  }
}
marker_custom.dart
    

Próximos pasos

Consulta el conjunto completo de muestras en GitHub:

Ver en GitHub

Como alternativa, clona el conjunto completo de muestras para ejecutarlas de forma local. Para ello, ejecuta los siguientes comandos:

  git clone -b flutter_samples https://github.com/googlemaps-samples/flutter-maps-samples.git
  cd flutter-samples
  flutter pub get