Null response in await api - flutter

Question

This print('response>>>>>>'); print(response); is NULL
print ("api") - this return is OK
In Api.dart
Future list(arguments) async {Dio dio = new Dio();
try {
var arg = arguments;
String refreshToken = token;
dio.options.baseUrl = serverUrl + "/test/" + arg.toString();
dio.options.responseType = ResponseType.json;
Response response = await dio.get(
"${dio.options.baseUrl}",
options: Options(
headers: {
'Authorization': "Bearer $refreshToken",
'Content-Type': "application/json;charset=UTF-8",
'Accept': "gzip"
}
)
);
print ("api");
print(response.data);
return await response.data;
} catch (e) {
print(e);
}
myclass.dart
cl
ass Page extends StatefulWidget {
#override
PageState createState() => PageState();
}
class PageState extends State<Page> {
List data;
Future<List> list() async {
Network network = new Network();
final String arguments = ModalRoute.of(context).settings.arguments as String;
print(arguments);
var response = await network.list(arguments.toString());
print('response>>>>>>');
print(response);
if (mounted){
this.setState(() {
data = response;
});
};
// _saving = false;
// print('data');
// print(data);
// return "Success!";
}
#override
void initState(){
super.initState();
// Future.delayed(Duration.zero, this.dados_propostas);
// dados_propostas();
}
#override
Widget build(BuildContext context) {
this.list();
return AlertDialog(
title: const Text('Teste'),
actions: <Widget>[
FlatButton(
onPressed: debugDumpApp,
child: Row(
children: <Widget>[
const Icon(
Icons.dvr,
size: 18.0,
),
Container(
width: 8.0,
),
const Text('DUMP'),
],
),
),
FlatButton(
onPressed: () {
Navigator.pop(context, false);
},
child: const Text('OK'),
),
],
);
}
}

Answer 1

Use this function:
Future<Response> get(String url, String token) async {
Response response = Response();
try {
dio.options.contentType = "application/json;charset=UTF-8";
dio.options.headers["Authorization"] = "Bearer $token";
response = await dio.get(url);
return response;
} on DioError catch (error, stacktrace) {
print("Exception occured: $error stackTrace: $stacktrace");
return error.response;
}
}