Add json values in to the list of object

Assuming you've a JSON file, which you may have parsed like this:

String json = await rootBundle.loadString('file_name.json');
var response = jsonDecode(json);

This is how you can do it:

List<dynamic> jsonData; //similar to var jsonData = [something, something, ...]

//traversing through each value in the key value arrangement of the json
for (var k in response.values) {
   jsonData.add(k);  //adding each value to the list
}

After the loop ends, jsonData will have all the values of your JSON file.

It's important for you to know that even if you put the keys on a list, they won't necessarily be in order, because of the way maps work.

Assuming your json is a map and not a json string, you could put all of the values on a list like so:

var myList = (jsonObject['data'] as List).fold<List>(
  [], 
  (prev, curr) => [...prev, ...curr.values]
);

if you were talking about a json string:

Map<String, dynamic> jsonObject = jsonDecode(jsonString);

For simplicity, lets assume this json is unparsed in a string.

(1) Assuming the code snippet you added is a string && is valid json you can do as follows :)

import 'dart:convert';

void main() {
  var x = json.decode('''
      {
        "data": [
            {
                "hello": "2",
                "serviceId": 1017,
                "name": "اکو",
                "code": "235",
                "price": 1562500,
                "isDefault": true,
                "transportCostIncluded": false,
                "qty": 0,
                "minQty": 1,
                "maxQty": 2,
                "description": "یک دستگاه اکو به همراه دو باند و یک عدد میکروفن (تامین برق بعهده پیمانکار می باشد).",
                "contractorSharePercent": 65,
                "unitMeasureId": 7,
                "unitMeasureName": "هر 60 دقیقه",
                "superContractorsId": null
            }
        ]
      }
  ''');
  print(x);
  List<dynamic> listOfObjects = (x['data'] as Iterable<dynamic>).toList();

  /// this is just gonna be a list of all of your object.
  print(listOfObjects);

  List<dynamic> listOfValues = (x['data'] as Iterable<dynamic>).map((_object) {
    return (_object as Map<String, dynamic>).values.toList();
  }).toList();

  /// this is gonna be a 2d array here,
  print(listOfValues);
}

Hope This helped out:)

Also json here comes from import 'dart:convert';