BaseActivity baseActivity=new BaseActivity();
NotificationCompat.Builder mBuilder=new NotificationCompat.Builder(baseActivity.getContext())
.setSmallIcon(R.drawable.app_icon)
.setContentTitle("GreekLink")
.setContentText(message);
Intent calendarIntent=new Intent(baseActivity.getContext(), CalendarActivity.class);
TaskStackBuilder stackBuilder=TaskStackBuilder.create(baseActivity.getContext());
stackBuilder.addParentStack(CalendarActivity.class);
stackBuilder.addNextIntentWithParentStack(calendarIntent);