title: how can i know postdelayed has finished its operation in android
body: <p>I have a Handler how can i know when the postdelayed method has been completed. </p>
  
  <pre><code>    new Handler().postDelayed(new Runnable(){
          public void run() {
              ll.setEnabled(false);
          } 
      }, 3000);  
  </code></pre>