Flutter print a specific value

Question

I have a very easy question dont know why I am not able to find it anywhere I just need to print the specific value of data

My code

  Future<http.Response> _trySubmit() async {
    final isValid = _formKey.currentState.validate();
    FocusScope.of(context).unfocus();

    if (isValid) {
      _formKey.currentState.save();

      print(_userEmail.trim());
      print(_userPassword.trim());

      var map = new Map<String, dynamic>();


      map['grant_type'] = 'password';
      map['username'] = _userEmail.trim();
      map['password'] = _userPassword.trim();


      http.Response res = await http.post(
        'http://sublimeapi.netcodesolution.com/token',
        headers: <String, String>{
          'Content-Type': 'application/x-www-form-urlencoded',
        },
        body: map,
      );
      var data = res.body;
      print(data);
    }
    }

Its printing the value like this

I/flutter ( 5147):{"access_token":"FwYttAQIDDSRpuFFUgzznmMYgMNNfiW4OvQ4","token_type":"bearer","expires_in":86399}

I need to print just access_token value

Something like this print(data.access_token)

Jigar Patel · Accepted Answer · 2020-08-20 12:12:54Z

2

Here data is a Map. So if you want to print a specific value out of it, you need to mention the corresponding key name like this

print(data['access_token']);

answered Aug 20, 2020 at 12:12

Jigar Patel

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4 Comments

rameez khan Over a year ago

Thanks its showing this error on access_token The argument type 'String' can't be assigned to the parameter type 'int'

Jigar Patel Over a year ago

On which line of code? It must be when you are trying to pass this access_token value to an int parameter.

rameez khan Over a year ago

its showing on access_token when i just print the value as you say like this print(data['access_token']); its showing red line on access_token

Jigar Patel Over a year ago

It should not show this error on that line. Are you sure it is showing the error there?

Lapa Ny Aina Tanjona · Accepted Answer · 2020-08-20 12:31:35Z

0

You need to decode the response result before printing the value :

 http.Response res = await http.post(
            'http://sublimeapi.netcodesolution.com/token',
            headers: <String, String>{
              'Content-Type': 'application/x-www-form-urlencoded',
            },
            body: map,
          );
          var data = json.decode(res.body.toString());
          print(data["access_token"]);

Don't forget importing :

import 'dart:convert';

answered Aug 20, 2020 at 12:31

Lapa Ny Aina Tanjona

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Comments

Tafadzwa L Nyamukapa · Accepted Answer · 2020-08-20 12:36:55Z

0

Your can try something like this: Decode the json response first then access the data in the Map

http.Response res = await http.post(
    'http://sublimeapi.netcodesolution.com/token',
    headers: <String, String>{
      'Content-Type': 'application/x-www-form-urlencoded',
    },
    body: map,
  );
     var responseBody = json.decode(res.body);
     print(responseBody['access_token']); //This should return your token
 }
}

answered Aug 20, 2020 at 12:36

Tafadzwa L Nyamukapa

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