Android get current count returned by cursor

I need your help. I have a listview and search edittext, when I type to search for a record and matches from db, it displays all records. However, if no record matches it just displays nothing. What I wanna do is to display a message No Records Found

This is what I've tried so far:

 etSearch.addTextChangedListener(new TextWatcher (){

        public void afterTextChanged(Editable arg0) {


        }

        public void beforeTextChanged(CharSequence arg0, int arg1,
                int arg2, int arg3) {


        }

        public void onTextChanged(CharSequence cs, int arg1, int arg2,
                int arg3) {


            adapter.getFilter().filter(cs.toString());

        }

    });

 adapter.setFilterQueryProvider(new FilterQueryProvider() {

        @Override
        public Cursor runQuery(CharSequence constraint) {

            String searchBy = constraint.toString();

            if(cursor == null) {
                Log.e("Cursor", "" + "Empty result");
            }

            return dbHelper.searchProduct(searchBy, telco);

        }
    });

Any ideas? I would gladly appreciate your help. Thanks.