Android: Listen for notification update -

is there way listen if notification updated. example if receive message in messenger notification listener notice that, once receive second message - notification listener ignores that.

i have tried cancelling notifications, did not work

my notification listener:

public class reader extends notificationlistenerservice{      @override         public void onnotificationposted(statusbarnotification sbn) {     string pack = sbn.getpackagename();                 int id = sbn.getid();                 string ticker = sbn.getnotification().tickertext.tostring();                 bundle extras = sbn.getnotification().extras;                 final string title = extras.getstring("android.title");                  string tag = sbn.gettag();                 int ides = extras.getint("android.id");                 final string ss = extras.getstring("android.text").tostring();                 final string text = ss.tolowercase();                 if (pack.equals("com.facebook.orca")) {     string e = "tah";                 log.e(e, pack);                 log.e(e, ticker);                 log.e(e, title);                 log.e(e, ss);                  intent msgrcv = new intent("msg");                 msgrcv.putextra("package", pack);                 msgrcv.putextra("ticker", ticker);                 msgrcv.putextra("title", title);                 msgrcv.putextra("text", ">" + text + "");                  localbroadcastmanager.getinstance(context).sendbroadcast(msgrcv);             }         }