android - How to use DialogFragment for Date Picker in Fragment (onCreateDialog not used) -

i have done little research in dialogfragment , using fragment oncreate dialog not work. understand there documentation

http://developer.android.com/reference/android/app/dialogfragment.html#alertdialog

although new android programming , not easy understand code involved unless relates doing, below class have problems with:

public class addfixture extends fragment {   public addfixture() {   }   private datepicker datepicker;  private calendar calendar;  private textview dateview;  private int year, month, day;   @override  public void oncreate(bundle savedinstancestate) {   super.oncreate(savedinstancestate);   sethasoptionsmenu(true);  }   @override  public view oncreateview(layoutinflater inflater, viewgroup container,   bundle savedinstancestate) {   // inflate layout fragment   return inflater.inflate(r.layout.add_fixture, container, false);  }   @override  public void onviewcreated(view view, bundle savedinstancestate) {    add_date = (button) view.findviewbyid(r.id.datebutton);    dateview = (textview) view.findviewbyid(r.id.dateselected);   calendar = calendar.getinstance();    year = calendar.get(calendar.year);   month = calendar.get(calendar.month);   day = calendar.get(calendar.day_of_month);   showdate(year, month + 1, day);    //call setdate method   setdate();     @suppresswarnings("deprecation")   public void setdate() {    add_date.setonclicklistener(new view.onclicklistener() {     @override     public void onclick(view v) {      getactivity().showdialog(999);      toast.maketext(getactivity().getapplicationcontext(), "ca", toast.length_short)       .show();     }    });   }    //oncreatedialog depreciated   @override   protected dialog oncreatedialog(int id) {    // todo auto-generated method stub    if (id == 999) {     return new datepickerdialog(getactivity(), mydatelistener, year, month, day);    }    return null;   }    private datepickerdialog.ondatesetlistener mydatelistener = new datepickerdialog.ondatesetlistener() {    @override    public void ondateset(datepicker arg0, int arg1, int arg2, int arg3) {     // todo auto-generated method stub     // arg1 = year     // arg2 = month     // arg3 = day     showdate(arg1, arg2 + 1, arg3);    }   };    private void showdate(int year, int month, int day) {    dateview.settext(new stringbuilder().append(day).append("/")     .append(month).append("/").append(year));   }     @override   public void oncreateoptionsmenu(menu menu, menuinflater inflater) {    getactivity().getmenuinflater().inflate(r.menu.main, menu);    super.oncreateoptionsmenu(menu, inflater);   }   }