flutter - Extract the value from a future

Question

I want to extract the value of the response from an api call.

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

  refreshToken() {
  Future<http.Response> _response = _httpClient.callApi(
      endPoint: refreshTokenEndpoint, variables: refreshTokenVariables);

  http.Response _tokenResponse;
  _response.then((http.Response value) => _tokenResponse = value);

  print(_tokenResponse.body);
  }

But when i try to access the body i get an error body was called on null.

question from:https://stackoverflow.com/questions/65672029/extract-the-value-from-a-future

Answer 1

You need wait for _tokenResponse because come from Future.

refreshTokenSolution() async {
    Future<bool> _response = Future.delayed(Duration(seconds: 2), () => true);
    bool _tokenResponse = await _response; // Wait this response and after go next line
    print(_tokenResponse); //TRUE
  }