How to set text on TextView in realtime when user click checked in checkbox android

How to set text on TextView in realtime when user click checked in checkbox android

I would like to show text on textview when user clicked checked

in my adapter

viewHoder.cx_select.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {



                if (isChecked) {

                    Log.d("CreateChatFriendAdap", "onClick position: " + position);
                    Log.d("CreateChatFriendAdap", "onClick getFirstname: " + chatFriendsListModels.get(position).getFirstname());

                    chatFriendsListModels.get(position).setChecked(true);
                    chatCreateGroup.fong(chatFriendsListModels);

                }
                if (!isChecked) {
                    chatFriendsListModels.get(position).setChecked(false);
                    chatCreateGroup.fong(chatFriendsListModels);
                }
            }
        });

and in my fragment

    public void fong(ArrayList<ChatFriendsListModel.FriendBean> chatFriendsListModelArrayList) {

            for (int i = 0; i < chatFriendsListModelArrayList.size(); i++) {
                if (chatFriendsListModelArrayList.get(i).isChecked() == true) {

                    ff.add(chatFriendsListModelArrayList.get(i).getFirstname());

                }
            }
rrrr.setText("");
for (int j = 0; j < ff.size(); j++){
    rrrr.append("Name: " + ff.get(j));
}


        }