Want to set an active Marker with Google Maps on Flutter? You can implement custom active state through onTap event handler. In stateful widget create state to track selected marker and rebuild all markers comparing their IDs to the highlighted one:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 | import 'package:flutter/material.dart'; import 'package:google_maps_flutter/google_maps_flutter.dart'; class GoogleMapsLabPage extends StatefulWidget { @override State<GoogleMapsLabPage> createState() => GoogleMapsLabPageState(); } class GoogleMapsLabPageState extends State<GoogleMapsLabPage> { final preset = [ {"id": "mountain-view", "lat": 37.421512, "lng": -122.084101}, {"id": "san-bruno", "lat": 37.62816, "lng": -122.426491}, {"id": "san-francisco", "lat": 37.789972, "lng": -122.390013}, {"id": "sunnyvale", "lat": 37.403694, "lng": -122.031583} ]; String _selectedOffice = ''; List<Marker> _buildMarkers() { return preset.map((office) { return Marker( markerId: MarkerId(office['id']), position: LatLng(office['lat'], office['lng']), icon: office['id'] == _selectedOffice ? BitmapDescriptor.defaultMarkerWithHue(BitmapDescriptor.hueBlue) : BitmapDescriptor.defaultMarker, consumeTapEvents: true, onTap: () { setState(() { _selectedOffice = office['id']; }); }); }); } @override Widget build(BuildContext context) { return new Scaffold( body: GoogleMap( initialCameraPosition: CameraPosition(target: LatLng(37.7, -122.2), zoom: 9.0), markers: _buildMarkers().toSet(), ), ); } } |
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