How to call a method after a delay in Android

0 votes
asked Jun 18, 2010 by aryaxt

I want to be able to call the following method after a specified delay. In objective c there was something like:

[self performSelector:@selector(DoSomething) withObject:nil afterDelay:5];

Is there an equivalent of this method in android with java? For example I need to be able to call a method after 5 seconds.

public void DoSomething()
{
     //do something here
}

17 Answers

0 votes
answered Jun 18, 2010 by nate

I suggest the Timer, it allows you to schedule a method to be called on a very specific interval. This will not block your UI, and keep your app resonsive while the method is being executed.

The other option, is the wait(); method, this will block the current thread for the specified length of time. This will cause your UI to stop responding if you do this on the UI thread.

0 votes
answered Jun 18, 2010 by oscarryz

See this demo:

import java.util.Timer;
import java.util.TimerTask;

class Test {
     public static void main( String [] args ) {
          int delay = 5000;// in ms 

          Timer timer = new Timer();

          timer.schedule( new TimerTask(){
             public void run() { 
                 System.out.println("Wait, what..:");
              }
           }, delay);

           System.out.println("Would it run?");
     }
}
0 votes
answered Jun 18, 2010 by erickson

Note: This answer was given when the question didn't specify Android as the context. For an answer specific to the Android UI thread look here.


It looks like the Mac OS API lets the current thread continue, and schedules the task to run asynchronously. In the Java, the equivalent function is provided by the java.util.concurrent package. I'm not sure what limitations Android might impose.

private static final ScheduledExecutorService worker = 
  Executors.newSingleThreadScheduledExecutor();

void someMethod() {
  ⋮
  Runnable task = new Runnable() {
    public void run() {
      /* Do something… */
    }
  };
  worker.schedule(task, 5, TimeUnit.SECONDS);
  ⋮
}
0 votes
answered Jun 18, 2010 by aryaxt

Thanks for all the great answers, I found a solution that best suits my needs.

Handler myHandler = new DoSomething();
Message m = new Message();
m.obj = c;//passing a parameter here
myHandler.sendMessageDelayed(m, 1000);

class DoSomething extends Handler {
    @Override
    public void handleMessage(Message msg) {
      MyObject o = (MyObject) msg.obj;
      //do something here
    }
}
0 votes
answered Jun 6, 2012 by kontinuity

Better version:

final Handler handler = new Handler();
handler.postDelayed(new Runnable() {
  @Override
  public void run() {
    //Do something after 100ms
  }
}, 100);
0 votes
answered Jun 9, 2012 by vishnu
final Handler handler = new Handler(); 
Timer t = new Timer(); 
t.schedule(new TimerTask() { 
    public void run() { 
        handler.post(new Runnable() { 
            public void run() { 
                //DO SOME ACTIONS HERE , THIS ACTIONS WILL WILL EXECUTE AFTER 5 SECONDS...
            }
        }); 
    } 
}, 5000); 
0 votes
answered Jun 23, 2012 by jules-colle

I couldn't use any of the other answers in my case. I used the native java Timer instead.

new Timer().schedule(new TimerTask() {          
    @Override
    public void run() {
        // this code will be executed after 2 seconds       
    }
}, 2000);
0 votes
answered Jun 22, 2013 by hossam-ghareeb

you can use Handler inside UIThread:

runOnUiThread(new Runnable() {

    @Override
    public void run() {
         final Handler handler = new Handler();
         handler.postDelayed(new Runnable() {
           @Override
           public void run() {
               //add your code here
           }
         }, 1000);

    }
});
0 votes
answered Jun 28, 2014 by faakhir

A suitable solution in android:

private static long SLEEP_TIME = 2 // for 2 second
.
.
MyLauncher launcher = new MyLauncher();
            launcher.start();
.
.
private class MyLauncher extends Thread {
        @Override
        /**
         * Sleep for 2 seconds as you can also change SLEEP_TIME 2 to any. 
         */
        public void run() {
            try {
                // Sleeping
                Thread.sleep(SLEEP_TIME * 1000);
            } catch (Exception e) {
                Log.e(TAG, e.getMessage());
            }
            //do something you want to do
           //And your code will be executed after 2 second
        }
    }
0 votes
answered Jun 4, 2015 by noob

If you have to use the Handler, but you are into another thread, you can use runonuithread to run the handler in UI thread. This will save you from Exceptions thrown asking to call Looper.Prepare()

runOnUiThread(new Runnable() {
    @Override
    public void run() {
        new Handler().postDelayed(new Runnable() {
            @Override
            public void run() {
                //Do something after 1 second
            }
        }, 1000);
    }
});

Looks quite messy, but this is one of the way.

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