Question

I have created the notification object using NotificationCompat.Builder and then elsewhere in my service I’d like to update value. What is the right approach to do this? Should I cancel this object and bulid another one?

    Intent intent = new Intent(this, MainActivity.class);
    intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP | Intent.FLAG_ACTIVITY_SINGLE_TOP);
    PendingIntent pendIntent = PendingIntent.getActivity(this, 0, intent, 0);

     Notification noti = new NotificationCompat.Builder(this)
     .setContentTitle("App")
     .setContentText("estimated value:" + String.valueOf(value))  // <---- wanna update this
     .setSmallIcon(R.drawable.ic_launcher)
     .setContentIntent(pendIntent)
     .build();

     startForeground(1235, noti);

Answer 1

You do not need to cancel your previous notification. Instead, you can simply run the identical code with different content text (in this case, changing value).

For more info, see the Updating Notifications section of the Android docs.