Setting onClickListner for items within popup window in android

Question

I have a popup window that contains 2 text views.

If user click on one text view toast must appear.I coded for this function but shows Nullpointer exception in line far.setOnClickListener(new OnClickListener() { Please help me on this.

My code :

btn_a.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            LayoutInflater lInflater = (LayoutInflater) getActivity().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            View popup_view = lInflater.inflate(R.layout.popup_a, null);
            final PopupWindow popup = new PopupWindow(popup_view,200,75,true);
            popup.setFocusable(true);
            popup.setBackgroundDrawable(new ColorDrawable());   
            popup.showAsDropDown(btn_a,  0,0);

            TextView far = (TextView) rootView.findViewById(R.id.fartext);
            far.setOnClickListener(new OnClickListener() {

                @Override
                public void onClick(View v) {
                    Toast.makeText(getActivity(), "Clicked Far", Toast.LENGTH_SHORT).show();

                }
            });
        }
    });

Answer 1

Change this line

TextView far = (TextView) popup_view.findViewById(R.id.fartext);

instead of this

TextView far = (TextView) rootView.findViewById(R.id.fartext);