Updating an ongoing notification quietly

Question

I have a service which connects to other devices wirelessly. When the service is enabled, I have an ongoing notification which states it is enabled.

After the servi

Answer 1

Try this

    int id = (int) Calendar.getInstance().getTimeInMillis();

Use this id in the notify() method. Time of your Android System itself creates a unique ID

Answer 2

You should update existing notification https://developer.android.com/training/notify-user/build-notification.html#Updating

Answer 3

I too experienced this issue, and with help of previous comments and a bit of digging I have found the solution.

If you do not want notifications to flash when updated, or to continuously hog the status bar of the device,you must:

• Use setOnlyAlertOnce(true) on the builder
• Use the SAME Builder for each update.

If you use a new builder each time, then I am guessing Android has to rebuild the view all over again causing it to briefly disappear.

An example of some good code:

class NotificationExample extends Activity {

  private NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(this);
  private mNotificationManager =
    (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);

  //Different Id's will show up as different notifications
  private int mNotificationId = 1;    

  //Some things we only have to set the first time.
  private boolean firstTime = true;

  private updateNotification(String message, int progress) {
    if (firstTime) {
      mBuilder.setSmallIcon(R.drawable.icon)
      .setContentTitle("My Notification")
      .setOnlyAlertOnce(true);
      firstTime = false;
    }
    mBuilder.setContentText(message)
    .setProgress(100, progress, true);

    mNotificationManager.notify(mNotificationId, mBuilder.build());
  }
}

With the above code, you can just call updateNotification(String, int) with a message and progress (0-100) and it will update the notification without annoying the user.

Answer 4

This worked for me, whereby an ongoing activity (not SERVICE) notification is updated 'silently'.

NotificationManager notifManager; // notifManager IS GLOBAL
note = new NotificationCompat.Builder(this)
    .setContentTitle(YOUR_TITLE)
    .setSmallIcon(R.drawable.yourImageHere);

note.setOnlyAlertOnce(true);
note.setOngoing(true);
note.setWhen( System.currentTimeMillis() );

note.setContentText(YOUR_MESSAGE);

Notification notification = note.build();
notifManager.notify(THE_ID_TO_UPDATE, notification );