Uri.parse('https://www.a2rstore.in/api/school/v1/noticeApi.php?id=${widget.s_id}'); got error on widget.s_id

Issue

class Notice extends StatefulWidget {
  final String s_id;

  const Notice({Key key, this.s_id}) : super(key: key);

  @override
  _NoticeState createState() => _NoticeState();
}

class _NoticeState extends State<Notice> {
  TextEditingController _titleController = new TextEditingController();

  var api =
      Uri.parse('https://www.a2rstore.in/api/school/v1/noticeApi.php?id=${widget.s_id}');

Solution

You can’t call the "widget" without the context.
The proper way to do it is by first defining your variable:

class _NoticeState extends State<Notice> {
  TextEditingController _titleController = new TextEditingController();

  var api;
  ...
}

And then assigning to it the value either in the build or initState method:

@override
initState(){
   api = Uri.parse('https://www.a2rstore.in/api/school/v1/noticeApi.php?id=${widget.s_id}');
}

Answered By – Gabriel Costache

Answer Checked By – Willingham (FlutterFixes Volunteer)