http_service.dart

import 'dart:convert';

import 'package:http/http.dart';
import 'model.dart';

class HttpService {
  final String postsUrl =
      "https://test.dabbawala.ml/mobileapi/vendor/getallitems.php";

  Future<List<Model>> getData() async {
    Response res = await post(Uri.parse(postsUrl), body: {'vendorID': '115'});
    if (res.statusCode == 200) {
      List<dynamic> data = jsonDecode(res.body)['data'];
      List<Model> models = data.map((e) => Model.fromJson(e)).toList();

      return models;
    }
  }
}

main.dart

import 'package:flutter/material.dart';
import 'package:new_gradient_app_bar/new_gradient_app_bar.dart';
import 'http_service.dart';
import 'model.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      title: 'API Demo',
      theme: ThemeData(
        // primarySwatch: Colors.blue,
        visualDensity: VisualDensity.adaptivePlatformDensity,
      ),
      home: MyHomePage(title: 'API demo'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key key, this.title}) : super(key: key);
  final String title;

  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  HttpService service;
  @override
  void initState() {
    super.initState();
    service = HttpService();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: NewGradientAppBar(
        title: Text(
          widget.title,
          style: TextStyle(color: Colors.black),
        ),
        centerTitle: true,
        gradient: LinearGradient(
          colors: [
            Colors.tealAccent,
            Colors.yellowAccent,
          ],
          begin: Alignment.centerLeft,
          end: Alignment.centerRight,
        ),
      ),
      body: Center(
        child: Container(
          decoration: BoxDecoration(
            gradient: LinearGradient(
              begin: Alignment.topRight,
              end: Alignment.bottomLeft,
              colors: [
                Colors.brown,
                Colors.red,
                Colors.deepOrange,
                Colors.pink,
              ],
              stops: [0.1, 0.4, 0.6, 0.9],
            ),
          ),
          child: ListView.builder(
            itemBuilder: (BuildContext context, int index) {
              return FutureBuilder(
                future: service.getData(),
                builder: (context, snapshot) {
                  return Text('${snapshot.data[index]['itemID']}');
                },
              );
            },
          ),
        ),
      ),
    );
  }
}
import 'package:flutter/material.dart';
import 'package:new_gradient_app_bar/new_gradient_app_bar.dart';
import 'http_service.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      title: 'API Demo',
      theme: ThemeData(
        // primarySwatch: Colors.blue,
        visualDensity: VisualDensity.adaptivePlatformDensity,
      ),
      home: MyHomePage(title: 'API demo'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key key, this.title}) : super(key: key);
  final String title;

  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  HttpService service;
  @override
  void initState() {
    super.initState();
    service = HttpService();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: NewGradientAppBar(
        title: Text(
          widget.title,
          style: TextStyle(color: Colors.black),
        ),
        centerTitle: true,
        gradient: LinearGradient(
          colors: [
            Colors.tealAccent,
            Colors.yellowAccent,
          ],
          begin: Alignment.centerLeft,
          end: Alignment.centerRight,
        ),
      ),
      body: Center(
        child: Container(
          decoration: BoxDecoration(
            gradient: LinearGradient(
              begin: Alignment.topRight,
              end: Alignment.bottomLeft,
              colors: [
                Colors.brown,
                Colors.red,
                Colors.deepOrange,
                Colors.pink,
              ],
              stops: [0.1, 0.4, 0.6, 0.9],
            ),
          ),
          child: ListView.builder(
            itemBuilder: (BuildContext context, int index) {
              return FutureBuilder(
                future: service.getData(),
                builder: (context, snapshot) {
                  return Text('${snapshot.data[index]['itemID']}');
                },
              );
            },
          ),
        ),
      ),
    );
  }
}

model.dart

class Model {
  String itemID;
  String itemVendorid;
  String itemName;
  String itemCuisine;
  String itemType;
  String itemCategory;
  String itemPrice;
  String itemDescription;
  String itemStatus;
  String lastAvailibityDate;
  String vendorID;
  String vendorName;
  String vendorEMail;
  String vendorPassword;
  String vendorPhone;
  String vendorAddress;
  String vendorLatitude;
  String vendorLongitude;
  String vendorGSTIN;
  String vendorCuisine;
  String vendorLogoid;
  String vendorDeliverypartner;
  String vendorTax;
  String vendorPackingcharge;
  String vendorCommission;
  String vendorBrkfaststart;
  String vendorBrkfastend;
  String vendorLunchstart;
  String vendorLunchend;
  String vendorSnacksstart;
  String vendorSnacksend;
  String vendorDinnerstart;
  String vendorDinnerend;
  String vendorFCM;
  String vendorStatus;
  String iimID;
  String iimItemid;
  String iimImageid;
  String iimStatus;
  String imageID;
  String imageName;
  String imageStatus;
  String cuisineID;
  String cuisineName;
  String cuisineStatus;

  Model(
      {this.itemID,
      this.itemVendorid,
      this.itemName,
      this.itemCuisine,
      this.itemType,
      this.itemCategory,
      this.itemPrice,
      this.itemDescription,
      this.itemStatus,
      this.lastAvailibityDate,
      this.vendorID,
      this.vendorName,
      this.vendorEMail,
      this.vendorPassword,
      this.vendorPhone,
      this.vendorAddress,
      this.vendorLatitude,
      this.vendorLongitude,
      this.vendorGSTIN,
      this.vendorCuisine,
      this.vendorLogoid,
      this.vendorDeliverypartner,
      this.vendorTax,
      this.vendorPackingcharge,
      this.vendorCommission,
      this.vendorBrkfaststart,
      this.vendorBrkfastend,
      this.vendorLunchstart,
      this.vendorLunchend,
      this.vendorSnacksstart,
      this.vendorSnacksend,
      this.vendorDinnerstart,
      this.vendorDinnerend,
      this.vendorFCM,
      this.vendorStatus,
      this.iimID,
      this.iimItemid,
      this.iimImageid,
      this.iimStatus,
      this.imageID,
      this.imageName,
      this.imageStatus,
      this.cuisineID,
      this.cuisineName,
      this.cuisineStatus});

  factory Model.fromJson(Map<String, dynamic> json) => Model(
        itemID: json['itemID'],
        itemVendorid: json['itemVendorid'],
        itemName: json['itemName'],
        itemCuisine: json['itemCuisine'],
        itemType: json['itemType'],
        itemCategory: json['itemCategory'],
        itemPrice: json['itemPrice'],
        itemDescription: json['itemDescription'],
        itemStatus: json['itemStatus'],
        lastAvailibityDate: json['LastAvailibityDate'],
        vendorID: json['vendorID'],
        vendorName: json['vendorName'],
        vendorEMail: json['vendorE-Mail'],
        vendorPassword: json['vendorPassword'],
        vendorPhone: json['vendorPhone'],
        vendorAddress: json['vendorAddress'],
        vendorLatitude: json['vendorLatitude'],
        vendorLongitude: json['vendorLongitude'],
        vendorGSTIN: json['vendorGSTIN'],
        vendorCuisine: json['vendorCuisine'],
        vendorLogoid: json['vendorLogoid'],
        vendorDeliverypartner: json['vendorDeliverypartner'],
        vendorTax: json['vendorTax'],
        vendorPackingcharge: json['vendorPackingcharge'],
        vendorCommission: json['vendorCommission'],
        vendorBrkfaststart: json['vendorBrkfaststart'],
        vendorBrkfastend: json['vendorBrkfastend'],
        vendorLunchstart: json['vendorLunchstart'],
        vendorLunchend: json['vendorLunchend'],
        vendorSnacksstart: json['vendorSnacksstart'],
        vendorSnacksend: json['vendorSnacksend'],
        vendorDinnerstart: json['vendorDinnerstart'],
        vendorDinnerend: json['vendorDinnerend'],
        vendorFCM: json['vendorFCM'],
        vendorStatus: json['vendorStatus'],
        iimID: json['iimID'],
        iimItemid: json['iimItemid'],
        iimImageid: json['iimImageid'],
        iimStatus: json['iimStatus'],
        imageID: json['imageID'],
        imageName: json['imageName'],
        imageStatus: json['imageStatus'],
        cuisineID: json['cuisineID'],
        cuisineName: json['cuisineName'],
        cuisineStatus: json['cuisineStatus'],
      );

  Map<String, dynamic> toJson() {
    final Map<String, dynamic> data = new Map<String, dynamic>();

    data['itemID'] = this.itemID;
    data['itemVendorid'] = this.itemVendorid;
    data['itemName'] = this.itemName;
    data['itemCuisine'] = this.itemCuisine;
    data['itemType'] = this.itemType;
    data['itemCategory'] = this.itemCategory;
    data['itemPrice'] = this.itemPrice;
    data['itemDescription'] = this.itemDescription;
    data['itemStatus'] = this.itemStatus;
    data['LastAvailibityDate'] = this.lastAvailibityDate;
    data['vendorID'] = this.vendorID;
    data['vendorName'] = this.vendorName;
    data['vendorE-Mail'] = this.vendorEMail;
    data['vendorPassword'] = this.vendorPassword;
    data['vendorPhone'] = this.vendorPhone;
    data['vendorAddress'] = this.vendorAddress;
    data['vendorLatitude'] = this.vendorLatitude;
    data['vendorLongitude'] = this.vendorLongitude;
    data['vendorGSTIN'] = this.vendorGSTIN;
    data['vendorCuisine'] = this.vendorCuisine;
    data['vendorLogoid'] = this.vendorLogoid;
    data['vendorDeliverypartner'] = this.vendorDeliverypartner;
    data['vendorTax'] = this.vendorTax;
    data['vendorPackingcharge'] = this.vendorPackingcharge;
    data['vendorCommission'] = this.vendorCommission;
    data['vendorBrkfaststart'] = this.vendorBrkfaststart;
    data['vendorBrkfastend'] = this.vendorBrkfastend;
    data['vendorLunchstart'] = this.vendorLunchstart;
    data['vendorLunchend'] = this.vendorLunchend;
    data['vendorSnacksstart'] = this.vendorSnacksstart;
    data['vendorSnacksend'] = this.vendorSnacksend;
    data['vendorDinnerstart'] = this.vendorDinnerstart;
    data['vendorDinnerend'] = this.vendorDinnerend;
    data['vendorFCM'] = this.vendorFCM;
    data['vendorStatus'] = this.vendorStatus;
    data['iimID'] = this.iimID;
    data['iimItemid'] = this.iimItemid;
    data['iimImageid'] = this.iimImageid;
    data['iimStatus'] = this.iimStatus;
    data['imageID'] = this.imageID;
    data['imageName'] = this.imageName;
    data['imageStatus'] = this.imageStatus;
    data['cuisineID'] = this.cuisineID;
    data['cuisineName'] = this.cuisineName;
    data['cuisineStatus'] = this.cuisineStatus;
    return data;
  }
}