doctor_app_flutter/lib/providers/projects_provider.dart

import 'dart:convert';

import 'package:flutter/cupertino.dart';
import 'package:http/http.dart' as http;

const GET_PROJECTS =
    'https://hmgwebservices.com/Services/Lists.svc/REST/GetProjectForDoctorAPP';

class ProjectsProvider with ChangeNotifier {
  Future<Map> getProjectsList() async {
    Map<String, String> requestHeaders = {
      'Content-type': 'application/json',
      'Accept': 'application/json',
    };
    const url = GET_PROJECTS;
    var info = {
      "LanguageID": 2,
      "stamp": "2020-02-26T13:51:44.111Z",
      "IPAdress": "11.11.11.11",
      "VersionID": 1.2,
      "Channel": 9,
      "TokenID": "",
      "SessionID": "i1UJwCTSqt",
      "IsLoginForDoctorApp": true
    };
    try {
      final response = await http.post(url,
          headers: requestHeaders, body: json.encode(info));
      return Future.value(json.decode(response.body));
    } catch (error) {
      throw error;
      // print('error');
    }
  }
}