You need to set itemsCanFocus on the list like this:
To make the button clickable. Then you will need to use your own adapter and in getView return a view which is Clickable and focusable. You will also lose the default highlight states so you need to put them back in with the background resource. So do this:
view.setClickable(true); view.setFocusable(true); view.setBackgroundResource(android.R.drawable.menuitem_background);
to your view before returning your view.