which 'on' method is called when the trackball's 'Select' button is pressed?

which 'on' event is invoked when the user selects a ListView item by pressing the trackball button? i trapped onKeyDown, onTouchEvent, o开发者_StackOverflow中文版nTrackballEvent but it's none of those... thanks

That is a "click" and triggers your OnItemClickListener (or onListItemClick() if you are implementing a ListActivity).