android - Unable to refresh listView from other class -

in main fragment, have listview called noteslistview. noteadapter populates noteslistview. when user long clicks on 1 of noteslistview's elements, dialog shows , asks if user wants remove item. if agrees, item removed database. if not - life goes on.

the issue dialog other class (other fragment). class, pass database object , noteadapter object well, remove item database , notify noteadapter data has changed. sounds enough, doesn't work, , have absolutely no idea why. give please , me out.

this method in mainfragment, handles mentioned listview:

public void handlenotes(final listview noteslistview) {

if (database.getnotecount() != 0) {     noteslistview.setadapter(noteadapter);      noteslistview.setonitemlongclicklistener(new adapterview.onitemlongclicklistener() {         @override         public boolean onitemlongclick(adapterview<?> adapterview, view view, int i, long l) {             textview textviewid = (textview) view.findviewbyid(r.id.textviewid);              deletenotefragment newfragment = new deletenotefragment(database, noteadapter, integer.parseint(textviewid.gettext().tostring()));             newfragment.show(getactivity().getsupportfragmentmanager(), "deleteconfirmation");              return false;         }     }); } 

}

as can see, deletenotefragment being created , shown. lets @ deletenotefragment itself:

public class deletenotefragment extends dialogfragment {     private database database;     private noteadapter noteadapter;     private int i;      public deletenotefragment(database database, noteadapter noteadapter, int i) {         this.database = database;         this.noteadapter = noteadapter;         this.i = i;     }      @nonnull     @override     public dialog oncreatedialog(bundle savedinstancestate) {         // use builder class convenient dialog construction         alertdialog.builder builder = new alertdialog.builder(getactivity());         builder.setmessage(r.string.dialog_delete_note)                 .setpositivebutton(r.string.dialog_delete_confirm, new dialoginterface.onclicklistener() {                     public void onclick(dialoginterface dialog, int id) {                         database.removenote(i);                         noteadapter.notifydatasetchanged();                         toast.maketext(getactivity(), "note deleted successfully!", toast.length_long).show();                     }                 })                 .setnegativebutton(r.string.dialog_delete_denny, new dialoginterface.onclicklistener() {                     public void onclick(dialoginterface dialog, int id) {                         // user cancelled dialog                     }                 });          // create alertdialog object , return         return builder.create();     }   } 

maybe can spot making mistake, or got tips how solve issue?

you deleting data in database not in adapter:

database.removenote(i); noteadapter.notifydatasetchanged(); 

creates method in adapter list have in adapter. like:

database.removenote(i); noteadapter.getlistofitems().remove(i); noteadapter.notifydatasetchanged();