java - AdapterView.AdapterContextMenuInfo is null -

here problem, have architecture of class :

• activity
  • fragment
    • recyclerview (which has adapter)

the adapter:

• has class viewholder:

  public static class noteviewholder extends recyclerview.viewholder implements view.oncreatecontextmenulistener{   textview notename;    public noteviewholder(view itemview) {      super(itemview);     notename = (textview)itemview.findviewbyid(r.id.note_name);     itemview.setonclicklistener(new view.onclicklistener() {         @override         public void onclick(view view) {/**/}     });     itemview.setoncreatecontextmenulistener(this);    }  @override public void oncreatecontextmenu(contextmenu contextmenu, view view,     contextmenu.contextmenuinfo contextmenuinfo) {      contextmenu.setheadertitle("select action");     contextmenu.add(0,666,0,"delete note"); } 

  }

the fragment

overrrides oncontextitemselected(menuitem item){     //info null     adapterview.adaptercontextmenuinfo info =         (adapterview.adaptercontextmenuinfo) item.getmenuinfo(); } 

it calls

    registerforcontextmenu(recyclerview); 

the sequence

1. i long click on noteviewholder, opens context menu
2. i select "delete"
3. oncreatecontextmenu called contextmenuinfo == null
4. onselectedcontextitem called item.getmenuinfo() == null

how can menuinfo non null?

shoud create myself menu info, , if where?

ps, i've seen post: how create context menu recyclerview , don't see answer this

ps2 i've read this: http://androidheight.blogspot.fr/2015/03/recyclerview-widget-example-in-android.html, , me line new recycleradapter().info = menuinfo; seems wrong

thank you

you need call registerforcontextmenu() in activity on recyclerview.