Уведомление по заданному времени

    @Override
    public void onCreate() {
        super.onCreate();
        Intent myIntent = new Intent(this, Happi.class) ;
        PendingIntent pIntent1 = PendingIntent.getBroadcast(this, 0, myIntent, 0);
        AlarmManager alarm = (AlarmManager)getSystemService(ALARM_SERVICE);
        Calendar cal = Calendar.getInstance();
        cal.set(Calendar.MONTH, Calendar.NOVEMBER);
        cal.set(Calendar.DAY_OF_MONTH, 19);
        cal.set(Calendar.HOUR_OF_DAY, 20);
        cal.set(Calendar.MINUTE, 15);
        cal.set(Calendar.SECOND, 0);
        alarm.set(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), pIntent1);
 
        Intent myIntent2 = new Intent(this, Newer.class) ;
        PendingIntent pIntent2 = PendingIntent.getBroadcast(this, 0, myIntent2, 0);
        AlarmManager alarm2 = (AlarmManager)getSystemService(ALARM_SERVICE);
        Calendar cal2 = Calendar.getInstance();
        cal2.set(Calendar.MONTH, Calendar.NOVEMBER);
        cal2.set(Calendar.DAY_OF_MONTH, 19);
        cal2.set(Calendar.HOUR_OF_DAY, 20);
        cal2.set(Calendar.MINUTE, 16);
        cal2.set(Calendar.SECOND, 0);
        alarm2.set(AlarmManager.RTC_WAKEUP, cal2.getTimeInMillis(), pIntent2);
 
     }
 
 
    public IBinder onBind(Intent arg0) {
        return null;
    }
}

public class Happi extends BroadcastReceiver {
    NotificationManager nm;
 
    @Override
    public void onReceive(Context context, Intent intent) {
        String string1 = context.getResources().getString(R.string.an);
        String string2 = context.getResources().getString(R.string.prd);
        nm = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
        Notification notif = new Notification(R.mipmap.ic_launcher, string1,
                System.currentTimeMillis());
 
        Intent intent1 = new Intent(context, MainActivity.class);
        intent1.putExtra(MainActivity.FILE_NAME, "somefile");
        PendingIntent pIntent = PendingIntent.getActivity(context, 0, intent1, 0);
 
        notif.setLatestEventInfo(context, string2, string1, pIntent);
 
        notif.flags |= Notification.FLAG_AUTO_CANCEL;
        notif.defaults = Notification.DEFAULT_ALL;
        nm.notify(1, notif);
 
    }
}

public class Newer extends BroadcastReceiver {
    NotificationManager nm;
 
    @Override
    public void onReceive(Context context, Intent intent) {
        String string1 = context.getResources().getString(R.string.kr);
        String string2 = context.getResources().getString(R.string.prd);
        nm = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
        Notification notif = new Notification(R.mipmap.ic_launcher, string1,
                System.currentTimeMillis());
 
        Intent intent1 = new Intent(context, MainActivity.class);
        intent1.putExtra(MainActivity.FILE_NAME, "somefile");
        PendingIntent pIntent = PendingIntent.getActivity(context, 0, intent1, 0);
 
        notif.setLatestEventInfo(context, string2, string1, pIntent);
 
        notif.flags |= Notification.FLAG_AUTO_CANCEL;
        notif.defaults = Notification.DEFAULT_ALL;
        nm.notify(2, notif);
 
    }
}

public class MyService extends Service {
    NotificationManager nm;
 
    public IBinder onBind(Intent intent) {
        return null;
    }
 
    void someTask() { }
 
    public int onStartCommand(Intent intent, int flags, int startId) {
        someTask();
        return super.onStartCommand(intent, flags, startId);
    }
 
    public void onDestroy() {
        super.onDestroy();
    }
 
    public void onCreate() {
        Calendar c = Calendar.getInstance();
        CharSequence date = c.get(Calendar.HOUR_OF_DAY) + "." + c.get(Calendar.MINUTE);
        if((date.equals("20.15")) || (date.equals("22.34")) || (date.equals("23.45"))) {
 
            CharSequence string1 = "Title";
            CharSequence string2 = "Text";
            nm = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
            Notification notif = new Notification(R.mipmap.ic_launcher, string1,
                    System.currentTimeMillis());
 
            Intent intent1 = new Intent(this, MainActivity.class);
            PendingIntent pIntent = PendingIntent.getActivity(this, 0, intent1, 0);
 
            notif.setLatestEventInfo(this, string2, string1, pIntent);
 
            notif.flags |= Notification.FLAG_AUTO_CANCEL;
            notif.defaults = Notification.DEFAULT_ALL;
            nm.notify(1, notif);
        }
    }
}