The getter 'Timer' isn't defined for the class

Question

I was following this stack-overflow to implement a timer operations at a one-second interval and is getting the captioned error. What do I have to do?

  floatingActionButton: FloatingActionButton(
    child: Icon(Icons.add),
    onPressed: () async {
      Timer.periodic(Duration(seconds:1), (Timer t) => print(t));
    }
  );

Error:

lib/main.dart:182:48: Error: 'Timer' isn't a type.                      
      Timer.periodic(Duration(seconds:1), (Timer t) => print(t));   
                                           ^^^^^                    
lib/main.dart:182:11: Error: The getter 'Timer' isn't defined for the class '_UploadPageState'.
 - '_UploadPageState' is from 'package:decg_main/main.dart' ('lib/main.dart').
Try correcting the name to the name of an existing getter, or defining a getter or field named 'Timer'.
          Timer.periodic(Duration(seconds:1), (Timer t) => print(t));

can you share `_UploadPageState` too? – Yaya Dec 01 '20 at 09:59 — Yaya, Dec 01 '20 at 09:59

score 3 · Answer 1 · answered Dec 01 '20 at 10:01

3

I found the solution here: https://developermemos.com/posts/create-repeating-timer-flutter

Have to import 'dart:async';
Have to add Timer timer = prior to the Timer.periodic() function.

answered Dec 01 '20 at 10:01

neic

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The getter 'Timer' isn't defined for the class

1 Answers1