Android: Delete item from Listview that was populated using Parse in Custom Adapter -

i trying delete item in parse.com using button in listview. listview populated using custom adapter class , executing onclick delete it. great!

update: delete module modulecode equal position's modulecode

this part of adapter trying work error parseexception e is: 04-09 19:33:05.408 10425-10425/com.yupo.dominic.yupo e/error﹕ java.lang.illegalargumentexception: invalid type parseobject: class com.yupo.dominic.yupo.module

button moduledeletebutton = (button)view.findviewbyid(r.id.moduledeletebutton);      moduledeletebutton.setonclicklistener(new view.onclicklistener(){         @override         public void onclick(view v) {              parsequery<parseobject> query = new parsequery<parseobject>("module");             query.whereequalto("objectid", getitem(position));             query.findinbackground(new findcallback<parseobject>() {                 public void done(list<parseobject> module, parseexception e) {                     if (e == null) {                         // iterate on messages , delete them                         for(parseobject delete : module)                         {                             delete.deleteinbackground();                         }                     } else {                         log.e("error", e.getmessage());                     }                 }             });             toast.maketext(v.getcontext(), "deleted", toast.length_long).show();         }     }); 

this full adapter:

package com.yupo.dominic.yupo;  import java.util.arraylist; import java.util.list; import android.content.context; import android.util.log; import android.view.layoutinflater; import android.view.view; import android.view.viewgroup; import android.widget.baseadapter; import android.widget.button; import android.widget.textview; import android.widget.toast;  import com.parse.findcallback; import com.parse.parseexception; import com.parse.parseobject; import com.parse.parsequery;  public class customlistviewadapter extends baseadapter {      // declare variables     context mcontext;     layoutinflater inflater;     private list<module> modulelist = null;     private arraylist<module> arraylist;      public customlistviewadapter(context context,list<module> modulelist) {         mcontext = context;         this.modulelist = modulelist;         inflater = layoutinflater.from(mcontext);         this.arraylist = new arraylist<module>();         this.arraylist.addall(modulelist);     }      public class viewholder {         textview modulecode;         textview modulename;         textview moduleuni;     }      @override     public int getcount() {         return modulelist.size();     }      @override     public module getitem(int position) {         return modulelist.get(position);     }      @override     public long getitemid(int position) {         return position;     }      public view getview(final int position, view view, viewgroup parent) {         final viewholder holder;         if (view == null) {             holder = new viewholder();             view = inflater.inflate(r.layout.module_list_item, null);             // locate textviews in listview_item.xml             holder.modulecode = (textview) view.findviewbyid(r.id.modulecodetextview);             holder.modulename = (textview) view.findviewbyid(r.id.modulenametextview);             holder.moduleuni = (textview) view.findviewbyid(r.id.moduleunitextview);             view.settag(holder);         } else {             holder = (viewholder) view.gettag();         }         // set results textviews         holder.modulecode.settext(modulelist.get(position).getmodulecode());         holder.modulename.settext(modulelist.get(position).getmodulename());         holder.moduleuni.settext(modulelist.get(position).getmoduleuni());          // listen listview item click         button moduledeletebutton = (button)view.findviewbyid(r.id.moduledeletebutton);          moduledeletebutton.setonclicklistener(new view.onclicklistener(){             @override             public void onclick(view v) {                  parsequery<parseobject> query = new parsequery<parseobject>("module");                 query.whereequalto("objectid", getitem(position));                 query.findinbackground(new findcallback<parseobject>() {                     public void done(list<parseobject> module, parseexception e) {                         if (e == null) {                             // iterate on messages , delete them                             for(parseobject delete : module)                             {                                 delete.deleteinbackground();                             }                         } else {                             log.e("error", e.getmessage());                         }                     }                 });                 toast.maketext(v.getcontext(), "deleted", toast.length_long).show();             }         });          return view;     } } 

here module class if needed:

package com.yupo.dominic.yupo;  public class module {     private string modulename;     private string modulecode;     private string moduleuni;      public string getmodulename() {         return modulename;     }      public void setmodulename(string modulename) {         this.modulename = modulename;     }      public string getmodulecode() {         return modulecode;     }      public void setmodulecode(string modulecode) {         this.modulecode = modulecode;     }      public string getmoduleuni() {         return moduleuni;     }      public void setmoduleuni(string moduleuni) {         this.moduleuni = moduleuni;     } } 

managed work out. changed query.whereequalto("objectid", getitem(position));

to

query.whereequalto("modulecode", getitem(position).getmodulecode()); 

not wanted works :)