Can't get the adapter of the Dialogfragment

Question

I Created class named Popupdialog which extends DialogFragment. So there is a recyclerview and adapter in that Popupdialog class.but when I am calling ((MyRecyclerViewforsmallcardincart)adapter).getmDataset(); from the activity ,I am getting NullpointerException.I know that the adapter is not going to the DialogFragment instead its uses its own adapter.How to overcome from this NullpointerException. adapter in the DialogFragment

adapter=new MyRecyclerViewforsmallcardincart(activity,data);
                            recyclerView.setAdapter(adapter);

Error part of the activity

dataset=((MyRecyclerViewforsmallcardincart)adapter).getmDataset();
                int o=((MyRecyclerViewforsmallcardincart)adapter).getdatasize();

actually the problem is that the activity and dialog fragment had individual adapter. how can I able to pass the adapter to Dialog fragment?

FragmentManager fm = getFragmentManager();
                PopupDialog dialogFragment = new PopupDialog();
                dialogFragment.setArguments(args);
                dialogFragment.show(fm, "Color picker")

this is what I used to call DialogFragment.Thanks in advance

It is, actually. EVERY NullPoiterExceprion has **the same origin**: a reference to a null object. — Phantômaxx, Apr 30 '16 at 13:28
@BobMalooga ok.I admit that.But If the solution is different,How comes the question is a duplicate?. — wonders of nature, Apr 30 '16 at 13:44
It's a duplicate due to its nature: an NPE. **Every NPE has the same origin and the same solution**: find the null reference and fix **that**. — Phantômaxx, Apr 30 '16 at 13:46
@BobMalooga But the answer (http://stackoverflow.com/questions/218384/what-is-a-null-pointer-exception-and-how-do-i-fix-it) never solves my problem. Also anyone who faced this kind of problem will never find the actual answer. — wonders of nature, Apr 30 '16 at 13:55
The juice, as I said, is: `Find and resolve your reference to a null object`. And that is. — Phantômaxx, Apr 30 '16 at 14:00

Can't get the adapter of the Dialogfragment

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