Countdown timer in flutter | Restartable timer in flutter

RestartableTimer class

1- Set RestartableTimer
2- Set Duration
3. Set Callback

The restartable timer implements Timer. It restarts from its initial position and can be restart any number of time. It provide a callback when given time passed.

import 'package:async/async.dart';

RestartableTimer(
  Duration _givenTime,
  ZoneCallback _zoneCallback
)

Example-

Method call when timer finishes its execution

_onTimerFinished() {
     // TODO: Perform some action
     print('Timer Finished');
}

RestartableTimer _restartTimer = RestartableTimer(Duration(seconds: 10),_onTimerFinished);

onPressed(){
   _restartTimer.reset();
}

To reset the timer

 _restartTimer.reset();

To cancel the timer

 _restartTimer.cancel();

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