该条件在等待异步操作完成时运行，然后在值为非空时显示Map。我已经重构了代码，并使用了geolocator包 ...
toList(); return StreamBuilder<bool>( stream: widget.canDrawLineControl.stream, initialData: true, builder: (_, canDraw) { return GoogleMap( mapType: MapType.normal, onMapCreated: (map) { _controller.complete(map); }, polylines: { // _polyDrawLine(latLngList: listDraw), if (can...
初始地图位置和缩放级别通过initialCameraPosition参数设置。 在floatingActionButton中,我们创建了一个浮动操作按钮,当用户点击按钮时,调用mapController的animateCamera方法来放大地图。
import 'dart:async'; import 'package:flutter/material.dart'; import 'package:get/get.dart'; import 'package:latlong2/latlong.dart'; import 'determinePosition.dart'; import 'package:geolocator/geolocator.dart'; import 'package:flutter_map/flutter_map.dart'; class MapMenuLocate extends StatelessWi...
我制作了一个应用程序,它使用geolocator包来检查GPS并获取用户的位置,我使用provider包来处理状态。问题是,当GPS关闭时,出现一个红色屏幕,显示纬度为空,我想实现一个屏幕,告诉用户打开GPS,并相应地更新位置。import 'package:flutter/material.dart'; import 'package:flutter/widgets.dart 浏览16提问于2020-05-03得...
Updating the marker to the current location Stopping the location tracking Whenever we want to stop the location tracking, we can use the cancel() method of the StreamSubscription. This will stop the stream listening. You can then use the MapShapeLayerController.removeMarkerAt() method to...
根据pub页面，此软件包只能与Android和IOS一起使用：https://pub.dev/packages/geocoding 这意味着没有...
Updating the marker to the current location Stopping the location tracking Whenever we want to stop the location tracking, we can use thecancel()method of theStreamSubscription. This will stop the stream listening. You can then use theMapShapeLayerController.removeMarkerAt()method to rem...
[ +1 ms] Found plugin geolocator at /Users/username/develop/flutter/.pub-cache/hosted/pub.dartlang.org/geolocator-6.1.1/ [ +1 ms] Found plugin google_maps_flutter at /Users/username/develop/flutter/.pub-cache/hosted/pub.dartlang.org/google_maps_flutter-0.5.33/ [ +6 ms] Found plugin ...
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