Notifications for Custom Calendar in Android -

i have custom calendar application integrated our school kiosk application. calendar must allow adding of events , set notification each event. how can 1 store each event , notify on set time , date? can me? here's calendar code.

public class mycalendar extends activity implements onclicklistener {  public calendar month; public calendaradapter adapter; public handler handler; public arraylist<string> items;      @override protected void oncreate(bundle savedinstancestate) {     super.oncreate(savedinstancestate);     requestwindowfeature(window.feature_no_title);     setcontentview(r.layout.calendar);          month = calendar.getinstance();     items = new arraylist<string>();     adapter = new calendaradapter(this, month);      gridview gridview = (gridview) findviewbyid(r.id.gridview);     gridview.setadapter(adapter);      handler = new handler();     handler.post(calendarupdater);      textview title = (textview) findviewbyid(r.id.title);     title.settext(android.text.format.dateformat.format("mmmm yyyy", month));      button previous = (button) findviewbyid(r.id.previous);     previous.setonclicklistener(this);      button next = (button) findviewbyid(r.id.next);     next.setonclicklistener(this);      gridview.setonitemclicklistener(new onitemclicklistener() {         public void onitemclick(adapterview<?> parent, view v,                 int position, long id) {             textview date = (textview) v.findviewbyid(r.id.date);             if (date instanceof textview && !date.gettext().equals("")) {                  intent intent = new intent(                         "com.gpplsmje.mac.calendar.calendarevents");                  intent.putextra(                         "date",                         android.text.format.dateformat                                 .format("mmmm", month)                                 + " "                                 + day                                 + ", "                                 + android.text.format.dateformat.format(                                         "yyyy", month));                 startactivity(intent);             }         }     });  public void refreshcalendar() {     textview title = (textview) findviewbyid(r.id.title);     daysadapter.fill();     adapter.refreshdays();     adapter.notifydatasetchanged();     handler.post(calendarupdater);     title.settext(android.text.format.dateformat.format("mmmm yyyy", month)); }  @override public void onnewintent(intent intent) {     string date = intent.getstringextra("date");     string[] datearr = date.split("-");     month.set(integer.parseint(datearr[0]),             integer.parseint(datearr[1], integer.parseint(datearr[2]))); }  public runnable calendarupdater = new runnable() {      @override     public void run() {         items.clear();         (int = 0; < 31; i++) {             random r = new random();             if (r.nextint(10) > 6) {                 items.add(integer.tostring(i));             }         }         adapter.setitems(items);         adapter.notifydatasetchanged();     }  };  @override public void onclick(view v) {     switch (v.getid()) {     case r.id.previous:         if (month.get(calendar.month) == month                 .getactualminimum(calendar.month)) {             month.set((month.get(calendar.year) - 1),                     month.getactualmaximum(calendar.month), 1);         } else {             month.set(calendar.month, month.get(calendar.month) - 1);         }         refreshcalendar();         break;     case r.id.next:         if (month.get(calendar.month) == month                 .getactualmaximum(calendar.month)) {             month.set((month.get(calendar.year) + 1),                     month.getactualminimum(calendar.month), 1);         } else {             month.set(calendar.month, month.get(calendar.month) + 1);         }         refreshcalendar();         break;     } } } 

here's calendaradapter class:

public class calendaradapter extends baseadapter {  static final int first_day_of_week = 0;  private context context;  private java.util.calendar month; private calendar selecteddate; private arraylist<string> items;  public string[] days;  public calendaradapter(context c, calendar monthcalendar) {     month = monthcalendar;     selecteddate = (calendar) monthcalendar.clone();     context = c;     month.set(calendar.day_of_month, 1);     this.items = new arraylist<string>();     refreshdays(); }  public void setitems(arraylist<string> items) {     (int = 0; != items.size(); i++) {         if (items.get(i).length() == 1) {             items.set(i, "0" + items.get(i));         }     }     this.items = items; }  @override public int getcount() {     // todo auto-generated method stub     return days.length; }  @override public object getitem(int arg0) {     // todo auto-generated method stub     return null; }  @override public long getitemid(int arg0) {     // todo auto-generated method stub     return 0; }  @override public view getview(int position, view convertview, viewgroup parent) {     view v = convertview;     textview dayview;     if (convertview == null) { // if it's not recycled, initialize                                 // attributes         layoutinflater vi = (layoutinflater) context                 .getsystemservice(context.layout_inflater_service);         v = vi.inflate(r.layout.calendar_item, null);     }     dayview = (textview) v.findviewbyid(r.id.date);      // disable empty days beginning      if (days[position].equals("")) {         dayview.setclickable(false);         dayview.setfocusable(false);     } else {         // mark current day focused         if (month.get(calendar.year) == selecteddate.get(calendar.year)                 && month.get(calendar.month) == selecteddate                         .get(calendar.month)                 && days[position].equals(""                         + selecteddate.get(calendar.day_of_month))) {             v.setbackgroundresource(r.drawable.item_background_focused);         } else {             v.setbackgroundresource(r.drawable.calendar_item_bg);         }     }     dayview.settext(days[position]);      // create date string comparison     string date = days[position];      if (date.length() == 1) {         date = "0" + date;     }     string monthstr = "" + (month.get(calendar.month) + 1);     if (monthstr.length() == 1) {         monthstr = "0" + monthstr;     }      // show icon if date not empty , exists in items array     imageview iw = (imageview) v.findviewbyid(r.id.date_icon);     if (date.length() > 0 && items != null && items.contains(date)) {         iw.setvisibility(view.visible);     } else {         iw.setvisibility(view.invisible);     }     return v; }  public void refreshdays() {     // clear items     items.clear();      int lastday = month.getactualmaximum(calendar.day_of_month);     int firstday = month.get(calendar.day_of_week);      int remain = 0;     int minus = firstday - 1;     if (lastday == 31) {         remain = 11 - minus;         if (firstday == 1) {             days = new string[lastday + (first_day_of_week * 6) + remain];         } else {             days = new string[lastday + firstday - (first_day_of_week + 1) + remain];         }     } else if (lastday == 30) {         remain = 12 - minus;         if (firstday == 1) {             days = new string[lastday + (first_day_of_week * 6) + remain];         } else {             days = new string[lastday + firstday - (first_day_of_week + 1) + remain];         }     } else if (lastday == 29) {         remain = 13 - minus;         if (firstday == 1) {             days = new string[lastday + (first_day_of_week * 6) + remain];         } else {             days = new string[lastday + firstday - (first_day_of_week + 1) + remain];         }     } else if (lastday == 28) {         remain = 14 - minus;         if (firstday == 1) {             days = new string[lastday + (first_day_of_week * 6) + remain];         } else {             days = new string[lastday + firstday - (first_day_of_week + 1) + remain];         }     }     // figure size of array     int dummy;     if (firstday == 1) {         dummy = lastday + (first_day_of_week * 6);     } else {         dummy = lastday + firstday - (first_day_of_week + 1);     }      int j = first_day_of_week;      // populate empty days before first real day     if (firstday > 1) {         (j = 0; j < firstday - first_day_of_week; j++) {             days[j] = "";         }     } else {         (j = 0; j < first_day_of_week * 6; j++) {             days[j] = "";         }         j = first_day_of_week * 6 + 1; // sunday => 1, monday => 7     }      // populate days     int daynumber = 1;     int i;     (i = (j - 1); < dummy; i++) {         days[i] = "" + daynumber;         daynumber++;     }     for(int k = i; k < days.length; k++){         days[k] = "";     } }  }