android - Notification disappears then reappears when clicked on? -

hi have notifcation set go off on specific day , time. here code -

private void createpushtimer() {     // todo auto-generated method stub     calendar calendar = calendar.getinstance();     intent intent = new intent(mainactivity.this, drawing.class);     pendingintent pendingintent = pendingintent.getbroadcast(mainactivity.this, 2, intent, 0);     alarmmanager = (alarmmanager)getsystemservice(alarm_service);     int day = calendar.get(calendar.day_of_week);     if (day == 4) { //5 thurs         calendar.set(calendar.hour_of_day, 9);          calendar.set(calendar.minute, 48);         calendar.set(calendar.second, 0);         am.setrepeating(alarmmanager.rtc_wakeup, calendar.gettimeinmillis(), alarmmanager.interval_day*7, pendingintent);     }     //am.setrepeating(alarmmanager.rtc_wakeup, 10000, alarmmanager.interval_day, pendingintent); } 

here receiving class notification -

 public void shownotification(context context) {     intent intent = new intent(context, mainactivity.class);     pendingintent pi = pendingintent.getactivity(context, 0, intent, 1);     notificationcompat.builder mbuilder = new notificationcompat.builder(context)         .setsmallicon(r.drawable.ic_launcher)         .setcontenttitle("drawing!")         .setcontenttext("the new drawing has been updated! check new numbers!")         .setautocancel(true);     mbuilder.setcontentintent(pi);     mbuilder.setdefaults(notification.default_sound);     //mbuilder.setautocancel(true);     notificationmanager mnotificationmanager = (notificationmanager) context.getsystemservice(context.notification_service);     mnotificationmanager.notify(0, mbuilder.build()); } 

it goes off @ appropriate time (9:48 on wednesday testing purposes) when notification clicked on, appears again @ start of app. disappear second reemerges. though time when clicked on. there better way of doing or missing something? help.