title: Open application after clicking on Notification
body: <p>I have a notification in my app with the following code:</p>
  
  <pre><code>//Notification Start
  
     notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
  
     int icon = R.drawable.n1; 
     CharSequence tickerText = "Call Blocker";
     long when = System.currentTimeMillis(); //now
     Notification notification = new Notification(icon, tickerText, when);
     Intent notificationIntent = new Intent(context, Main.class);
     PendingIntent contentIntent = PendingIntent.getActivity(context, 0, notificationIntent, 0);
  
     Context context = getApplicationContext();
     CharSequence title = "Call Blocker";
     text = "Calls will be blocked while driving";
  
     notification.setLatestEventInfo(context, title, text, contentIntent);
  
     notification.flags |= Notification.FLAG_ONGOING_EVENT;
     notification.flags |= Notification.FLAG_SHOW_LIGHTS;
     notificationManager.notify(1, notification);
  
  }
  </code></pre>
  
  <p>My notifications fires very well, but my problem is that, when I click on notification in Notification Center, it does not start my app. </p>
  
  <p>Basically, after clicking on my notification nothing happens!
  What should I do, in order to start my Main activity after clicking on my notification.
  Thanks.</p>