Flutter-从坐标获取地理编码地址

  • Z时代
  • 2024-01-10
  • 分类：问答

我已经实现了一种可靠的方式来获取用户正在创建的应用中的经度和纬度坐标，但是似乎无法将这些坐标转换为地标。

我还想弄清楚我需要使用什么来打印这些数据。

这就是我要获取的数据：

List<Placemark> place = [];
void _getPlace() async {
  List<Placemark> newPlace = await _geolocator.placemarkFromCoordinates(_position.latitude, _position.longitude);
  print(newPlace);
  setState(() {
    place = newPlace;
  });
}

谢谢

编辑：

在CopsOnRoad的回应之后，我得到了这个错误：

[VERBOSE-2:ui_dart_state.cc(148)] Unhandled Exception:
NoSuchMethodError: The method 'placemarkFromCoordinates' was called on null.
Receiver: null
Tried calling: placemarkFromCoordinates(51.4998, -0.129)
#0      Object.noSuchMethod  (dart:core-patch/object_patch.dart:50:5)
#1      _NearbyPageState._getPlace 
package:tr/pages/nearby.dart:128
<asynchronous suspension>
#2      _NearbyPageState._controlCard.<anonymous closure> 
package:tr/pages/nearby.dart:629
#3      GestureRecognizer.invokeCallback 
package:flutter/…/gestures/recognizer.dart:182
#4      TapGestureRecognizer._checkUp 
package:flutter/…/gestures/tap.dart:365
#5      TapGestureRecognizer.acceptGesture 
package:flutter/…/gestures/tap.dart:312
#6      GestureArenaManager.sweep 
package:flutter/…/gestures/arena.dart:156
#7      _WidgetsFlutterBinding&BindingBase&GestureBinding.handleEvent 
package:flutter/…/gestures/binding.dart:222
#8      _WidgetsFlutterBinding&BindingBase&GestureBinding.dispatchEvent (p<…>

回答：

您已经在那里，您需要的其他东西是：

String _address = ""; // create this variable
void _getPlace() async {
  List<Placemark> newPlace = await _geolocator.placemarkFromCoordinates(_position.latitude, _position.longitude);
  // this is all you need
  Placemark placeMark  = newPlace[0]; 
  String name = placeMark.name;
  String subLocality = placeMark.subLocality;
  String locality = placeMark.locality;
  String administrativeArea = placeMark.administrativeArea;
  String postalCode = placeMark.postalCode;
  String country = placeMark.country;
  String address = "${name}, ${subLocality}, ${locality}, ${administrativeArea} ${postalCode}, ${country}";
  print(address);
  setState(() {
    _address = address; // update _address
  });
}

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