title: Android Multiple Notification
body: <p>I have developing an App where the user can create event and set notification for that very event. So I want to add multiple notification. I am using the following code.</p>
  
  <pre><code>final Notification notifyDetails = new Notification(R.drawable.icon, "Myapp",calendar.getTimeInMillis());
  Context context = getApplicationContext();
  Intent notifyIntent = new Intent(context, ViewDoughnut.class);
  PendingIntent pendingIntent = PendingIntent.getActivity(ViewCal.this, 0, notifyIntent, android.content.Intent.FLAG_ACTIVITY_NEW_TASK);
  notifyDetails.setLatestEventInfo(context, contentTitle, contentText, pendingIntent);
  notifyDetails.flags = Notification.FLAG_ONGOING_EVENT;
  mNotificationManager.notify(SIMPLE_NOTFICATION_ID, notifyDetails);
  </code></pre>
  
  <p>When I add an event and creating a notification using the above code, it is working fine. But if I add another event, no new notification created, the old one is just updated. I want to add one more notification. How to do it? Moreover, I want to delete any specific notification if the user delete the event corresponding to it. How it is possible?</p>