如何以参数作为主体/原始数据从颤振api中获取数据？

Question

**

1. 邮政城域网代码

**curl -位置-请求发布'http://testing.thedivor.com/api/API/GetDistance‘-标题’内容-类型: application/json‘-数据-原始的{ "id"：“id”："placeid"：“"EiBMZXdpc2hhbSBXYXksIExvbmRvbiBTRTQgMVVZLCBVSyIuKiwKFAoSCXk1YsdYAnZIERCJXqRiE8WPEhQKEgnrjwApXwJ2SBH76fXJO6C02w"，"”address"："Lewisham Way，London SE4 1 UK，UK"，“邮政编码”："SE4 1 UK“，"outcode"："SE4 1 UK”，“SE4 1 UK”：51.4702816，"country"："United UK“，"city"：”city“，“经度”：-0.029187800000045172 }，{ "_id"："null"，"placeid"：“，”，“地址”："Kenley，SW19 3DW，UK"，“邮政编码”："SE23 3RF"，"outcode"："SE23"，“延迟”："51.404556"，"country"：""，""，“城市”：""，“经度”："-0.194486“} '‘}

颤振程序

'''var req = await Requests.post('http://testing.thedivor.com/api/API/GetDistance?', headers: {
      'Content-Type' :  'application/json'
    }, 

身体: body // json对象)；

    print(req.json());
    print(req.content().length);'''

Answer 1

​

​

试试这个：

import 'dart:convert';

import 'package:flutter/material.dart';
import 'package:flutter_hooks/flutter_hooks.dart';
import 'package:http/http.dart' as http;

void main() {
  runApp(
    MaterialApp(
      debugShowCheckedModeBanner: false,
      title: 'Flutter Demo',
      home: HomePage(),
    ),
  );
}

class HomePage extends HookWidget {
  Future<String> _getDistance() async {
    final response = await http.post(
      'http://testing.thedivor.com/api/API/GetDistance',
      headers: <String, String>{
        'Content-Type': 'application/json; charset=UTF-8',
      },
      body: jsonEncode(params),
    );
    print(response.body);
    return response.statusCode == 200
        ? jsonDecode(response.body).toString()
        : 'Failed to get distance';
  }

  @override
  Widget build(BuildContext context) {
    final _distance = useState<String>('');
    useEffect(() {
      _getDistance().then((d) => _distance.value = d);
      return;
    }, []);
    return Scaffold(
      body: Center(
        child: Text(_distance.value),
      ),
    );
  }
}

final List<Map<String, dynamic>> params = [
  {
    "id": "",
    "placeid":
        "EiBMZXdpc2hhbSBXYXksIExvbmRvbiBTRTQgMVVZLCBVSyIuKiwKFAoSCXk1YsdYAnZIERCJXqRiE8WPEhQKEgnrjwApXwJ2SBH76fXJO6C02w",
    "address": "Lewisham Way, London SE4 1UY, UK",
    "postcode": "SE4 1UY",
    "outcode": "SE4 1UY",
    "lattitude": 51.4702816,
    "country": "United Kingdom",
    "city": "Greater London",
    "longitude": -0.029187800000045172,
  },
  {
    "_id": "null",
    "placeid": "",
    "address": "Kenley Road, London SW19 3DW, UK",
    "postcode": "SE23 3RF",
    "outcode": "SE23",
    "lattitude": "51.404556",
    "country": "",
    "city": "",
    "longitude": "-0.194486",
  },
];