ScopedModel

http_page.dart

import 'package:flutter/material.dart';
import 'package:scoped_model/scoped_model.dart';
import 'package:dio/dio.dart';
import 'dart:convert';

class HttpPage extends StatefulWidget {
  @override
  _HttpPageState createState() => _HttpPageState();
}

class HttpModel extends Model {
  static HttpModel of(BuildContext context) =>
      ScopedModel.of<HttpModel>(context, rebuildOnChange: true);

  String url =
      "http://co-api.51wnl.com/calendar/details?token=CD78D9012F1C063E54C640EA27952F80&timestamp=1462377600&client=ceshi";

  BaseResponse baseResponse = BaseResponse.empty();
  CalendarData weather = CalendarData.empty();

  void fetchData() async {
    Response response = await Dio().get(url);
    if (response.statusCode == 200) {
      String data = response.data;
      baseResponse = BaseResponse.fromJson(json.decode(data));
      weather = baseResponse.data[0];
    } else {
      baseResponse = BaseResponse.empty();
    }
    notifyListeners();
  }
}

class _HttpPageState extends State<HttpPage> {

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text("HttpPage")),
      body: new Column(
        mainAxisAlignment: MainAxisAlignment.start,
        crossAxisAlignment: CrossAxisAlignment.center,
        children: <Widget>[
          new Container(
            width: double.infinity,
            margin: EdgeInsets.only(top: 40.0),
            child: new Text(
              "万年历",
              textAlign: TextAlign.center,
              style: new TextStyle(
                color: Colors.black,
                fontSize: 30.0,
              ),
            ),
          ),
          new Container(
            width: double.infinity,
            margin: EdgeInsets.only(top: 100.0),
            child: ScopedModel<HttpModel>(
              model: HttpModel(),
              child: ScopedModelDescendant<HttpModel>(builder: (context, child, model) {
                model.fetchData();
                return new Column(
                  children: <Widget>[
                    new Text(model.weather?.datekey,
                        style: new TextStyle(
                            color: Colors.black, fontSize: 30.0)),
                    new Text(model.weather?.weeks,
                        style: new TextStyle(
                            color: Colors.black, fontSize: 20.0)),
                    new Text(model.weather?.tgdz,
                        style: new TextStyle(
                            color: Colors.black, fontSize: 25.0)),
                    new Text(
                      model.weather?.constellation,
                      style: new TextStyle(color: Colors.black, fontSize: 30.0),
                    )
                  ],
                );
              }),
            ),
          )
        ],
      ),
    );
  }
}

class BaseResponse {
  int status;
  String errMsg;
  List<CalendarData> data;

  BaseResponse({this.status, this.errMsg, this.data});

  factory BaseResponse.fromJson(Map<String, dynamic> json) {
    var list = json['data'] as List;
    print(list.runtimeType);
    List<CalendarData> calendarList =
    list.map((i) => CalendarData.fromJson(i)).toList();

    return BaseResponse(
        status: json['status'], errMsg: json['errMsg'], data: calendarList);
  }

  static BaseResponse empty() {
    return BaseResponse();
  }
}

class CalendarData {
  String datekey; //2016/5/5 0:00:00
  String tgdz; //丙申年 [猴] 癸巳月 丁亥日
  String weekDay; //Thu
  String lunar; //三月廿九
  String weeks; //周四 第19周
  String constellation; //金牛座

  CalendarData(this.datekey, this.tgdz, this.weekDay, this.lunar, this.weeks,
      this.constellation);

  CalendarData.fromJson(Map<String, dynamic> json)
      : datekey = json['datekey'],
        tgdz = json['tgdz'],
        weekDay = json['weekDay'],
        lunar = json['lunar'],
        weeks = json['weeks'],
        constellation = json['constellation'];

  Map<String, dynamic> toJson() => {
    'datekey': datekey,
    'tgdz': tgdz,
    'weekDay': weekDay,
    'lunar': lunar,
    'weeks': weeks,
    'constellation': constellation,
  };

  static CalendarData empty() {
    return new CalendarData("日期", "天干地支", "星期", "农历日期", "周数", "星座");
  }
}