Here is an example using Timer.periodic : Countdown starts from 10 to 0 on button click : import ‘dart:async’; […] Timer _timer; int _start = 10; void startTimer() { const oneSec = const Duration(seconds: 1); _timer = new Timer.periodic( oneSec, (Timer timer) { if (_start == 0) { setState(() { timer.cancel(); }); } else { … Read more
I always do … myTimer.Stop(); myTimer.Start(); … is that a hack? 🙂 Per comment, on Threading.Timer, it’s the Change method … dueTime Type: System.Int32 The amount of time to delay before the invoking the callback method specified when the Timer was constructed, in milliseconds. Specify Timeout.Infinite to prevent the timer from restarting. Specify zero (0) … Read more
You need to declare timer outside the function. Otherwise, you get a brand new variable on each function invocation. var timer; function endAndStartTimer() { window.clearTimeout(timer); //var millisecBeforeRedirect = 10000; timer = window.setTimeout(function(){alert(‘Hello!’);},10000); }
var startTimeSpan = TimeSpan.Zero; var periodTimeSpan = TimeSpan.FromMinutes(5); var timer = new System.Threading.Timer((e) => { MyMethod(); }, null, startTimeSpan, periodTimeSpan); Edit – this answer is out of date. See https://stackoverflow.com/a/70887955/426894
If your program doesn’t have a event loop already, use the sched module, which implements a general purpose event scheduler. import sched, time s = sched.scheduler(time.time, time.sleep) def do_something(sc): print(“Doing stuff…”) # do your stuff sc.enter(60, 1, do_something, (sc,)) s.enter(60, 1, do_something, (s,)) s.run() If you’re already using an event loop library like asyncio, trio, … Read more
If you want to do a periodic task, use a ScheduledExecutorService. Specifically ScheduledExecutorService.scheduleAtFixedRate The code: Runnable helloRunnable = new Runnable() { public void run() { System.out.println(“Hello world”); } }; ScheduledExecutorService executor = Executors.newScheduledThreadPool(1); executor.scheduleAtFixedRate(helloRunnable, 0, 3, TimeUnit.SECONDS);
That’s very nice, however in order to simulate some time passing we need to run a command that takes some time and that’s very clear in second example. However, the style of using a for loop to do some functionality forever takes a lot of device resources and instead we can use the Garbage Collector … Read more
The solution you will use really depends on how long you need to wait between each execution of your function. If you are waiting for longer than 10 minutes, I would suggest using AlarmManager. // Some time when you want to run Date when = new Date(System.currentTimeMillis()); try { Intent someIntent = new Intent(someContext, MyReceiver.class); … Read more
var count=30; var counter=setInterval(timer, 1000); //1000 will run it every 1 second function timer() { count=count-1; if (count <= 0) { clearInterval(counter); //counter ended, do something here return; } //Do code for showing the number of seconds here } To make the code for the timer appear in a paragraph (or anywhere else on the … Read more
At the end of foo(), create a Timer which calls foo() itself after 10 seconds. Because, Timer create a new thread to call foo(). You can do other stuff without being blocked. import time, threading def foo(): print(time.ctime()) threading.Timer(10, foo).start() foo() #output: #Thu Dec 22 14:46:08 2011 #Thu Dec 22 14:46:18 2011 #Thu Dec 22 … Read more