timer before next function flutter code example

Example 1: repeating action every x seconds flutter

Timer timer;

@override
void initState() {
  super.initState();
  timer = Timer.periodic(Duration(seconds: 15), (Timer t) => checkForNewSharedLists());
}

@override
void dispose() {
  timer?.cancel();
  super.dispose();
}

Example 2: timer in flutter

Future.delayed(Duration(seconds: 1), () {
            print('yo hey');
          });