android - Alarm Manager shows notification everytime -

i have made android application displays notification message @ particular time (say 6:15:00 pm) of day. have used calendar along alarmmanager class purpose.

however, when installed app on phone test it, showed me message/notification @ specified time continues show same @ time..i mean notification keeps on coming throughout day in phone though have set time in app.

here code 1) activity class

import java.util.calendar; import android.app.activity; import android.app.alarmmanager; import android.app.pendingintent; import android.content.intent; import android.os.bundle;   public class mainactivity extends activity   {     private pendingintent pendingintent;  @override public void oncreate(bundle savedinstancestate)  {  super.oncreate(savedinstancestate); setcontentview(r.layout.activity_main);   calendar calendar = calendar.getinstance();  calendar.set(calendar.month, 6); calendar.set(calendar.year, 2013); calendar.set(calendar.day_of_month, 13);  calendar.set(calendar.hour_of_day, 20); calendar.set(calendar.minute, 48); calendar.set(calendar.second, 0); calendar.set(calendar.am_pm,calendar.pm);  intent myintent = new intent(mainactivity.this, myreceiver.class); pendingintent = pendingintent.getbroadcast(mainactivity.this, 0, myintent,0);  alarmmanager alarmmanager = (alarmmanager)getsystemservice(alarm_service); alarmmanager.set(alarmmanager.rtc, calendar.gettimeinmillis(), pendingintent);  } //end oncreate   } 

2) receiver

 import android.content.broadcastreceiver;  import android.content.context;  import android.content.intent;     public class myreceiver extends broadcastreceiver     {  @override  public void onreceive(context context, intent intent) {    intent service1 = new intent(context, myalarmservice.class);    context.startservice(service1);     }   } 

3) service class

   import android.app.notification;    import android.app.notificationmanager;    import android.app.pendingintent;    import android.app.service;    import android.content.intent;    import android.os.ibinder;    public class myalarmservice extends service     {  private notificationmanager mmanager;   @override  public ibinder onbind(intent arg0)  {    // todo auto-generated method stub     return null;  }  @override public void oncreate()  {    // todo auto-generated method stub      super.oncreate(); }     @suppresswarnings("static-access")     @override   public void onstart(intent intent, int startid)    {    super.onstart(intent, startid);     mmanager = (notificationmanager) this.getapplicationcontext().getsystemservice(this.getapplicationcontext().notification_service);    intent intent1 = new intent(this.getapplicationcontext(),mainactivity.class);     notification notification = new notification(r.drawable.ic_launcher,"this test message!", system.currenttimemillis());     intent1.addflags(intent.flag_activity_single_top| intent.flag_activity_clear_top);     pendingintent pendingnotificationintent = pendingintent.getactivity( this.getapplicationcontext(),0, intent1,pendingintent.flag_update_current);    notification.flags |= notification.flag_auto_cancel;    notification.setlatesteventinfo(this.getapplicationcontext(), "alarmmanagerdemo", "this test message!", pendingnotificationintent);     mmanager.notify(0, notification); }  @override public void ondestroy()  {     // todo auto-generated method stub     super.ondestroy(); } 

}

i have added both service , receiver in manifest.xml file. please can tell me should display notification once during entire day?

i guess reason oncreate method called multiple times , alarmmanager.set called multiple times. example, whenever screen orientation changed, activity destroyed , new activity starts oncreate() method. every time rotate screen activity destroyed , new activity starts oncreate() method , alarmmanager.set called again.

you may save state member in onsaveinstancestate(bundle bundle) method. android calls method whenever screen rotated, , given bundle bundle passed oncreate(bundle bundle). in oncreate, check bundle null before try call alarmmanager.set.