Android : how can we call the onBackPressed() function from Custom Adapter

how can we back to the first activity from a adapter button click

holder.close.setOnClickListener(new View.OnClickListener() {

                    @Override
                    public void onClick(View v) {
                        // TODO Auto-generated method stub
                        onBackPressed(); 
                    }
                }) ;
            return convertView;
        }