Android Question how to get click item from listview

Hi,

1. I open the database file and table has three field names.
2. add first,second field data into listview's label and second label.
3. I clicked the listview and I got first field data via value in ItemClick.

Questions are:
1. how to get second label's value when I click listview?
2. I want to add third field data into listview (but invisible like Tag property)
3. And I want to also get third field data when I click listview.

Thanks.