颤振 - 从坐标获取地理编码地址

Question

我已经实现了一种可靠的方法来获取用户纬度，长坐标在我正在创建的应用程序中，但似乎无法将这些坐标变成地标。

我还想弄清楚我需要使用什么来打印这些数据。

这就是我试图获取这些数据的原因：

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的响应之后，我收到此错误：

[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<…>

Answer 1

更新：使用地理编码

import 'package:geocoding/geocoding.dart';
List<Placemark> placemarks = await placemarkFromCoordinates(52.2165157, 6.9437819);

<小时 />

旧解决方案：

你已经在那里了，你需要的额外东西是：

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
});
}

Answer 2

从版本6.0.0 开始，地标已从地理定位器中删除，并移至地理编码。

从版本 6.0.0 开始，地理编码功能(地标发件人地址和地标发件人坐标(不再是地理定位器插件的一部分。我们已将这些功能移至他们自己的插件：地理编码。这个新插件是旧方法的改进版本。

使用地理编码将纬度和经度转换为地址

List<Placemark> placemarks = await placemarkFromCoordinates(52.2165157, 6.9437819);

Answer 3

使用 pub.dev flutter_geocoding

https://pub.dev/packages/flutter_geocoding

或

我使用了swift 'GMSGeocoder'和java'android.location.Geocoder'，并将其应用于颤振。我认为它比 pub.dev 中的库地理编码更有效。

我的示例代码

地理编码库Java和Swift自己添加

.java

@Override
public void configureFlutterEngine(@NonNull FlutterEngine flutterEngine) {
GeneratedPluginRegistrant.registerWith(flutterEngine);
super.configureFlutterEngine(flutterEngine);
new MethodChannel(flutterEngine.getDartExecutor().getBinaryMessenger(), "samples.flutter.dev/latlng")
.setMethodCallHandler(
(call, result) -> {
double lat = call.argument("lat");
double lng = call.argument("lng");
result.success("return value lat and lng");
}
);
}

.swift

override func application(
_ application: UIApplication,
didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?
) -> Bool {
let controller : FlutterViewController = window?.rootViewController as! FlutterViewController
let batteryChannel = FlutterMethodChannel(name: "samples.flutter.dev/latlng",
binaryMessenger: controller.binaryMessenger)

batteryChannel.setMethodCallHandler({
[weak self] (call: FlutterMethodCall, result: @escaping FlutterResult) -> Void in

// Note: this method is invoked on the UI thread.
guard call.method == "latlng" else {
result(FlutterMethodNotImplemented)
return
}

self?.latlng(call,result: result)
})
GMSServices.provideAPIKey("")
GeneratedPluginRegistrant.register(with: self)
return super.application(application, didFinishLaunchingWithOptions: launchOptions)
}

private func latlng(_ call: FlutterMethodCall,result:FlutterResult) {
if let args = call.arguments as? Dictionary<String, Any>,
let lat = args["lat"] as? Double ,let lng = args["lng"] as? Double  {
result("return latlng result" )
} else {
result(FlutterError.init(code: "bad args", message: nil, details: nil))
}
}

扑动

Future<void> _getBatteryLevel(double a, double b) async {
String latlng;
try {
final String result = await const MethodChannel('samples.flutter.dev/latlng').invokeMethod(
'latlng', <String, dynamic>{"lat": a, "lng": b});
latlng = result;
} on PlatformException catch (e) {
latlng = "Failed to get latlng level: '${e.message}'.";
}
}

Answer 4

首先，你在pubspec.yaml中包含lib -geolocator： ^3.0.1

///Get current location
Geolocator _geolocator = Geolocator();
String latitude = "";
String longitude = "";
String address = "";

试试这个解决方案 -

///Call this function
_fetchLocation() async {
Position position = await _geolocator.getCurrentPosition(
desiredAccuracy: LocationAccuracy.best);///Here you have choose level of distance
latitude = position.latitude.toString() ?? '';
longitude = position.longitude.toString() ?? '';
var placemarks = await _geolocator.placemarkFromCoordinates(position.latitude, position.longitude);
address ='${placemarks.first.name.isNotEmpty ? placemarks.first.name + ', ' : ''}${placemarks.first.thoroughfare.isNotEmpty ? placemarks.first.thoroughfare + ', ' : ''}${placemarks.first.subLocality.isNotEmpty ? placemarks.first.subLocality+ ', ' : ''}${placemarks.first.locality.isNotEmpty ? placemarks.first.locality+ ', ' : ''}${placemarks.first.subAdministrativeArea.isNotEmpty ? placemarks.first.subAdministrativeArea + ', ' : ''}${placemarks.first.postalCode.isNotEmpty ? placemarks.first.postalCode + ', ' : ''}${placemarks.first.administrativeArea.isNotEmpty ? placemarks.first.administrativeArea : ''}';
print("latitude"+latitude);
print("longitude"+longitude);
print("adreess"+address);
}

Answer 5

try {
await Geolocator()
.placemarkFromCoordinates(value[0], value[1])
.then((result) {
Placemark placeMark = result[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);

});
} on PlatformException catch (e) {
print(e);
}

Answer 6

使用Geolocator Plugin新版本(从版本6.0.0开始(。地理编码功能(placemarkFromAddress和placemarkFromCoordinates(不再是地理定位器插件的一部分。此方法已将这些功能移至自己的插件：地理编码

Answer 7

Future getLatAndlong(( async{ cl = await Geolocator.getCurrentPosition((.then((value(=>value(;

lat = cl.latitude;
long = cl.longitude;
_kGooglePlex =    CameraPosition(
target: LatLng(lat,long),
zoom:14
);
List<Placemark> placemarks = await placemarkFromCoordinates(
lat, long);
print("country"+placemarks[0].country!);
print("area"+placemarks[0].administrativeArea!);
print("locality"+placemarks[0].locality!);
print("sublocality"+placemarks[0].subLocality!);
print("postlocality"+placemarks[0].postalCode!);
print("street"+placemarks[0].street!);
setState(() {
countrycurrent = placemarks[0].country!;
localcurrent = placemarks[0].administrativeArea!;
madinacurrent = placemarks[0].subLocality!;
curren=countrycurrent+","+localcurrent+","+madinacurrent;
});

mymarker.add( 标记( 信息窗口： 信息窗口( 标题： 地标[0].国家！+ "," + 地标[0].行政区！+ "，"+ 地标[0].地方性！ ), 可拖动：真，

icon:
BitmapDescriptor.defaultMarkerWithHue(BitmapDescriptor.hueOrange),
markerId: MarkerId("4"),
position: LatLng(lat, long)),

(;}