Android : Upadate ListView from adatpter when clicking an ImageButon

I have List in a social networking app where i need to increase number of likes when user hits like button.

The onclicklistener inside adapter and I am reloading the whole list which makes the list go to top when reloading and i have to make it stay at same post so that user keeps seeing same post not the top of list my adapter code is like this:

public class PaListAdapter extends ArrayAdapter<GroupPostValues> {

public PaListAdapter(Context context, int resource) {
    super(context, resource);

}

public View getView(int position, View convertView, ViewGroup parent) {

    ImageView likeBtn = (ImageView) convertView
            .findViewById(R.id.likeImage);

    likeBtn.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View arg0) {
            // some asyncTask to call web servic that will increase likes

        }
    });


    return convertView;
}

}