Flutter从自动完成获取城市，国家

Question

我有一个位置自动填充器，但我找不到城市名称、国家/地区和所有详细信息的存储位置。我想将它们转移到诸如 city = name.city 之类的变量中，但我找不到从哪里获取它。

程序做什么，它得到地址的长和纬度。我试着弄乱他们，但我仍然找不到他们存储详细信息的位置。

这是我的代码

 import 'package:google_maps_webservice/places.dart';
import 'package:geocoder/geocoder.dart';
import 'package:flutter_google_places/flutter_google_places.dart';

   void main() => runApp(MyApp());

const kGoogleApiKey = "Api_key";

GoogleMapsPlaces _places = GoogleMapsPlaces(apiKey: kGoogleApiKey);

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        body: demo(),
      ),
    );
  }
}

class demo extends StatefulWidget {
  @override
  demoState createState() => new demoState();
}

class demoState extends State<demo> {
  @override
  Widget build(BuildContext context) {

    return Scaffold(
      body: Container(
        alignment: Alignment.center,
        child: RaisedButton(
          onPressed: () async {
            // show input autocomplete with selected mode
            // then get the Prediction selected
            Prediction p = await PlacesAutocomplete.show(
                context: context, apiKey: kGoogleApiKey);
            displayPrediction(p);
          },
          child: Text('Find address'),

        )
      )
    );
  }

  Future<Null> displayPrediction(Prediction p) async {
    if (p != null) {
      PlacesDetailsResponse detail =
      await _places.getDetailsByPlaceId(p.placeId);

      var placeId = p.placeId;
      double lat = detail.result.geometry.location.lat;
      double lng = detail.result.geometry.location.lng;

      var address = await Geocoder.local.findAddressesFromQuery(p.description);

      print(lat);
      print(lng);
    }
  }
}

Answer 1

GoogleMapsApi Place Details 不保证响应中的城市名称，但您可以访问国家名称和国家 ISO 代码，如下所示

Future<Null> displayPrediction(Prediction p) async {
  if (p != null) {
    PlacesDetailsResponse detail = await _places.getDetailsByPlaceId(p.placeId);

    var placeId = p.placeId;
    String countryIso, countryName;
    double lat = detail.result.geometry.location.lat;
    double lng = detail.result.geometry.location.lng;

    var address = await Geocoder.local.findAddressesFromQuery(p.description);

    for (var adrComp in detail.result.addressComponents) {
      if (adrComp.types.contains("country")) {
        countryIso = adrComp.shortName;
        countryName = adrComp.longName;
      }
    }

    print(lat);
    print(lng);
  }
}