我导入了两个具有相同名称的类的库。我试图通过在使用的项目中使用别名来解决冲突。我还尝试仅使用这两个导入创建一个小型空白项目，但我仍然无法运行集成测试。
这两个依赖项是
https://pub.dev/packages/google_maps_cluster_manager/example https://pub.dev/packages/google_maps_flutter/versions
我使用集群管理器中的示例代码制作了虚拟项目。
import 'dart:async';
import 'dart:ui';
import 'package:example/place.dart';
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:google_maps_cluster_manager/google_maps_cluster_manager.dart';
import 'package:google_maps_flutter/google_maps_flutter.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
// This widget is the root of your application.
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Cluster Manager Demo',
home: MapSample(),
);
}
}
// Clustering maps
class MapSample extends StatefulWidget {
@override
State<MapSample> createState() => MapSampleState();
}
class MapSampleState extends State<MapSample> {
late ClusterManager _manager;
Completer<GoogleMapController> _controller = Completer();
Set<Marker> markers = Set();
final CameraPosition _parisCameraPosition =
CameraPosition(target: LatLng(48.856613, 2.352222), zoom: 12.0);
List<Place> items = [
for (int i = 0; i < 10; i++)
Place(
name: 'Place $i',
latLng: LatLng(48.848200 + i * 0.001, 2.319124 + i * 0.001)),
for (int i = 0; i < 10; i++)
Place(
name: 'Restaurant $i',
isClosed: i % 2 == 0,
latLng: LatLng(48.858265 - i * 0.001, 2.350107 + i * 0.001)),
for (int i = 0; i < 10; i++)
Place(
name: 'Bar $i',
latLng: LatLng(48.858265 + i * 0.01, 2.350107 - i * 0.01)),
for (int i = 0; i < 10; i++)
Place(
name: 'Hotel $i',
latLng: LatLng(48.858265 - i * 0.1, 2.350107 - i * 0.01)),
for (int i = 0; i < 10; i++)
Place(
name: 'Test $i',
latLng: LatLng(66.160507 + i * 0.1, -153.369141 + i * 0.1)),
for (int i = 0; i < 10; i++)
Place(
name: 'Test2 $i',
latLng: LatLng(-36.848461 + i * 1, 169.763336 + i * 1)),
];
@override
void initState() {
_manager = _initClusterManager();
super.initState();
}
ClusterManager _initClusterManager() {
return ClusterManager<Place>(items, _updateMarkers,
markerBuilder: _markerBuilder);
}
void _updateMarkers(Set<Marker> markers) {
print('Updated ${markers.length} markers');
setState(() {
this.markers = markers;
});
}
@override
Widget build(BuildContext context) {
return new Scaffold(
body: GoogleMap(
mapType: MapType.normal,
initialCameraPosition: _parisCameraPosition,
markers: markers,
onMapCreated: (GoogleMapController controller) {
_controller.complete(controller);
_manager.setMapId(controller.mapId);
},
onCameraMove: _manager.onCameraMove,
onCameraIdle: _manager.updateMap),
floatingActionButton: FloatingActionButton(
onPressed: () {
_manager.setItems(<Place>[
for (int i = 0; i < 30; i++)
Place(
name: 'New Place ${DateTime.now()} $i',
latLng: LatLng(48.858265 + i * 0.01, 2.350107))
]);
},
child: Icon(Icons.update),
),
);
}
Future<Marker> Function(Cluster<Place>) get _markerBuilder =>
(cluster) async {
return Marker(
markerId: MarkerId(cluster.getId()),
position: cluster.location,
onTap: () {
print('---- $cluster');
cluster.items.forEach((p) => print(p));
},
icon: await _getMarkerBitmap(cluster.isMultiple ? 125 : 75,
text: cluster.isMultiple ? cluster.count.toString() : null),
);
};
Future<BitmapDescriptor> _getMarkerBitmap(int size, {String? text}) async {
if (kIsWeb) size = (size / 2).floor();
final PictureRecorder pictureRecorder = PictureRecorder();
final Canvas canvas = Canvas(pictureRecorder);
final Paint paint1 = Paint()..color = Colors.orange;
final Paint paint2 = Paint()..color = Colors.white;
canvas.drawCircle(Offset(size / 2, size / 2), size / 2.0, paint1);
canvas.drawCircle(Offset(size / 2, size / 2), size / 2.2, paint2);
canvas.drawCircle(Offset(size / 2, size / 2), size / 2.8, paint1);
if (text != null) {
TextPainter painter = TextPainter(textDirection: TextDirection.ltr);
painter.text = TextSpan(
text: text,
style: TextStyle(
fontSize: size / 3,
color: Colors.white,
fontWeight: FontWeight.normal),
);
painter.layout();
painter.paint(
canvas,
Offset(size / 2 - painter.width / 2, size / 2 - painter.height / 2),
);
}
final img = await pictureRecorder.endRecording().toImage(size, size);
final data = await img.toByteData(format: ImageByteFormat.png) as ByteData;
return BitmapDescriptor.fromBytes(data.buffer.asUint8List());
}
}
../../.pub-cache/hosted/pub.dev/google_maps_cluster_manager-3.1.0/lib/src/cluster_manager.dart:8:1: Error: 'Cluster' is imported from both 'package:google_maps_cluster_manager/src/cluster.dart' and 'package:google_maps_flutter_platform_interface/src/types/cluster.dart'.
import 'package:google_maps_flutter_platform_interface/google_maps_flutter_platform_interface.dart';
清理和重建缓存似乎也不起作用。有没有办法给这些依赖项起别名来阻止它们发生冲突？
我希望能够使用这两个库而不发生冲突。我尝试在使用依赖项的文件中使用别名，并隐藏导致冲突的“集群”。
如您的错误所示，
Error: 'Cluster' is imported from both 'package:google_maps_cluster_manager/src/cluster.dart' and 'package:google_maps_flutter_platform_interface/src/types/cluster.dart'.
import 'package:google_maps_flutter_platform_interface/google_maps_flutter_platform_interface.dart'
这表明这两个包的名称都为
Cluster当引用在两个或多个导入库中声明的名称时，分析器会生成此诊断信息。最常见的修复如下：
hide子句。在这种情况下，您可以从接口包中隐藏
Clusterimport 'package:google_maps_cluster_manager/google_maps_cluster_manager.dart';
import 'package:google_maps_flutter_platform_interface/google_maps_flutter_platform_interface.dart' hide Cluster;
as)，并使用适当的前缀限定引用：
import 'package:google_maps_cluster_manager/google_maps_cluster_manager.dart' as gmaps_clusterer;
import 'package:google_maps_flutter_platform_interface/google_maps_flutter_platform_interface.dart' as gmaps_interface;
// Then you can use the `Cluster` from both packages by using dot notation.
gmaps_clusterer.Cluster
gmaps_interface.Cluster