java - Member variable null on function return -

possible duplicate, doesn't apply example: here

i have 2 member variables mselectedorderitem , mselectedorderitemid, both of un-initialised , therefore null. (still doesn't work if assign them null in oncreate). there's arraylist morderlist.

in list view, if select item, these variables assigned values corresponding item.

i want use assigned values in method onclick, onclick sees mselectedorderitem null, regardless of whether initialised in onitemclick , can't figure out why.

import java.util.arraylist; import android.support.v4.app.fragment; import android.support.v4.app.fragmenttabhost; import android.os.bundle; import android.util.log; import android.view.layoutinflater; import android.view.view; import android.view.view.onclicklistener; import android.view.viewgroup; import android.widget.adapterview; import android.widget.arrayadapter; import android.widget.button; import android.widget.edittext; import android.widget.linearlayout; import android.widget.listview; import android.widget.textview;  public class menufragment extends fragment {  public static string tag = "menufragment"; public static final string title= "menu"; private fragmenttabhost mtabhost; private listview morderlistview; private arraylist<orderitem> morderlist; private arrayadapter<orderitem> morderlistadapter; private orderitem mselectedorderitem; private integer mselectedorderitemid;  /**  * returns new instance of menufragment managing fragments  *   * @return new instance of menufragment  */ static menufragment newinstance() {     return new menufragment(); }  @override public view oncreateview(layoutinflater inflater, viewgroup container, bundle savedinstancestate) {      linearlayout layout = (linearlayout) inflater.inflate(r.layout.menu_fragment, container, false);      // set inner food/drink tabs     mtabhost = (fragmenttabhost) layout.findviewbyid(android.r.id.tabhost);     mtabhost.setup(getactivity(), getchildfragmentmanager(), r.id.menu_items_fragment_container);     mtabhost.addtab(mtabhost.newtabspec("food").setindicator(fooditemsfragment.title), fooditemsfragment.class, null);     mtabhost.addtab(mtabhost.newtabspec("drinks").setindicator(drinkitemsfragment.title), drinkitemsfragment.class, null);      // set list view     morderlistview = (listview) layout.findviewbyid(r.id.ordered_items);     morderlist = new arraylist<orderitem>();     morderlist.add(new orderitem("first item"));     morderlist.add(new orderitem("second item"));     morderlist.add(new orderitem("third item"));     morderlist.add(new orderitem("fourth item"));      // set array adapter list view display contents of standing order list     morderlistadapter = new arrayadapter<orderitem>(getactivity(), android.r.layout.simple_list_item_1, morderlist);     morderlistview.setadapter(morderlistadapter);      return layout; }  @override public void onactivitycreated(bundle savedinstancestate) {     super.onactivitycreated(savedinstancestate);      // set list view that, when clicked, details shown in details section     // set happens when item in view clicked     morderlistview.setonitemclicklistener(new adapterview.onitemclicklistener() {          @override         public void onitemclick(adapterview<?> parent, view view, int position, long id) {              // identify element of order list             // since list positions , array positions same             // i.e. first position in list corresponds morderlist.get(0)             // use knowledge             mselectedorderitem = morderlist.get(position);             mselectedorderitemid = position;              // set text of details section             // worth storing these member variables since they're accessed             // lot?             ((textview) getactivity().findviewbyid(r.id.order_name)).settext(mselectedorderitem.getitemname());             ((edittext) getactivity().findviewbyid(r.id.order_note)).settext(mselectedorderitem.getitemnote());          }     });      // set happens when delete button pressed     ((button) getactivity().findviewbyid(r.id.delete_button)).setonclicklistener(new onclicklistener() {          @override         public void onclick(view view) {              // if there's no item selected, nothing             if (mselectedorderitem == null) {                 log.d(tag, "mselectedorderitem == null");                 return;             }              morderlist.remove(mselectedorderitem);             morderlistadapter.notifydatasetchanged();          }      });  } } 

any ideas?

cheers.

edit: added entire class code.

just add log.i("fragment","mselectedorderitemid = " + mselectedorderitemid); in

public void onitemclick(adapterview<?> parent, view view, int position, long id) 

and if called method correct value find solution in other place.