update textview in activity from Fragment

In kotlin

val textview = activity!!.findViewById<View>(R.id.textView) as TextView
        textview.text = "your_text"

Just do this.

TextView textview = (TextView)getActivity().findViewById(R.id.yourtextview);
textview.setText("text");

You can call it like this:

Replace:

 new menufeedActivity().setQountText(getCount);

With:

((menufeedActivity) getActivity()).setCountText(getCount);