CODEWITHSUNDEEP
flutter
raj
raj

Reputation: 341

How to convert the JSON response to Map in Flutter

I have a JSON response from my API call. The format is like this.

[
  {
    "hotelname": "A",
    "roomno": "101",
    "occupancy": "4"
  },
  {
    "hotelname": "A",
    "roomno": "102",
    "occupancy": "3"
  },
  {
    "hotelname": "B",
    "roomno": "101",
    "occupancy": "4"
  },
  {
    "hotelname": "B",
    "roomno": "202",
    "occupancy": "3"
  }
]

I want to write a code where in one dropdown list displays the names of the hotels(A,B,C etc) the other dropdown should display the corresponding roomno.

To achieve this i would like to convert my JSON response to a MAP like the below.

 Map<String,String> _hoteldata = {
    "101":"A",
    "102":"A",
    "101":"B",
    "202":"B",

  };

Upvotes: 0

Views: 1117

Answers (1)

bereal
bereal

Reputation: 34302

First, you parse the json using jsonDecode(), then create a map from the list, for example, using Map.fromEntries():

import 'dart:convert';
var rooms = jsonDecode(json) as List;
var hotelData = Map.fromEntries(
  rooms.map((room) => MapEntry(room['roomno'], room['hotelname']))
);

Upvotes: 1

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