How to retrive nested json array in flutter?

Question

This is my JSON data:

{ 
   "result":"0",
   "school_code":"School Code",
   "dashboard":{ 
      "resultPrivilege":"0",
      "privilege":[ 
         { 
            "activity_id":"activity_id",
            "privilege_id":"privilege_id"
         }
      ]
   }
}

I want to retrieve privilege array from this Json data.
Print privilege array on terminal.
How to retrieve JSON object of privilege array

This is my code to retrieve JSON data:

var data = json.decode(response.body);
    var resultCheck = data['result'];
    if (resultCheck == '0') {
      var rest = data["dashboard"];
      debugPrint(rest);
}

output of this code:

result check 0
I/flutter (18905): {"privilege":[
{"activity_id":165,"privilege_id":1568}

I want to output this format when i print privilege:

I/flutter (18905):[{"activity_id":165,"privilege_id":1568}]

How to get only privilege array on terminal also how to print object of privilege?.

Naveen Avidi · Accepted Answer · 2020-01-03 12:04:26Z

1

Map previlege = {
    'result': '0',
    'school_code': 'School Code',
    'dashboard': {
      'resultPrivilege': '0',
      'privilege': [
        {
          'activity_id': 'activity_id',
          'privilege_id': 'privilege_id',
        }
      ],
    }
  };
  print('Reuslt:  ${previlege['result']}' +
      '\nSchool Code:  ${previlege['school_code']}' +
      '\nActivity ID:  ${previlege['dashboard']['privilege'][0]['activity_id']}');

answered Jan 3, 2020 at 12:04

Naveen Avidi

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4 Comments

Naveen Avidi Over a year ago

I attached screenshot too ! How you are trying ?

shilpa navale Over a year ago

you declare json data in map privilege but i want to fetch json data from api

shilpa navale Over a year ago

http.Response response = await http.post(apiUrl, body: body, headers: headers); // print(response.body); Map data = json.decode(response.body); print(data); print('Reuslt: ${data['result']}' + '\nSchool Code: ${data['school_code']}' + '\nActivity ID: ${data['dashboard']['privilege'][0]['activity_id']}');

Naveen Avidi Over a year ago

change your code here--> var rest = data["dashboard"]; to var rest = data["dashboard"]['privilege'];

rstrelba · Accepted Answer · 2020-01-03 12:07:34Z

1

import 'dart:convert';

void main() {
  var jsonData='{"result":"0","school_code":"School Code","dashboard":{"resultPrivilege":"0", "privilege": [{"activity_id":"activity_id","privilege_id":"privilege_id"}]}}';
  var json=jsonDecode(jsonData);
  json['dashboard']['privilege'].forEach((obj){
    //
    print(obj.toString());
  });
}

answered Jan 3, 2020 at 12:07

rstrelba

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Comments

Crazy Lazy Cat · Accepted Answer · 2020-01-03 13:30:49Z

0

Try this,

Map<String, dynamic> jsonBody = json.decode(response.body);

String result = jsonBody["result"];
if (result == '0') {
  Map<String, dynamic> dashboard = jsonBody["dashboard"];
  List privilege = dashboard["privilege"];
  debugPrint(privilege.toString());
}

or you can easily create PODO(Plain Old Dart Objects) classes using quicktype or JsonToDart online tools. Then you can convert JSON to dart class objects.

edited Jan 3, 2020 at 13:30

answered Jan 3, 2020 at 12:54

Crazy Lazy Cat

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