How to access parent Activity View in Fragment

You can use

View view = getActivity().findViewById(R.id.viewid);

Quoting docs

Specifically, the fragment can access the Activity instance with getActivity() and easily perform tasks such as find a view in the activity layout

At first, create a view like this:

View view = getActivity().findViewById(R.id.viewid);

Then convert it to any view that you need like this:

 if( view instanceof EditText ) {
            editText = (EditText) view;
            editText.setText("edittext");
            //Do your stuff
        }

or

if( view instanceof TextView ) {
  TextView textView = (TextView) view;
  //Do your stuff
}

In Kotlin it is very easy to access parent Activity View in Fragment

activity!!.textview.setText("String")