Popup ListView to display a list with ID

Hi i have some question because i new for android code.

1. i doing a project for user login and retrieve all information from web server.


2. i have a button to click and will pop up a list of merchant display in radio button.


3. how i can populate the merchant name and id in the listview?


4. after select how to pass the selected merchant name n id back to the activity so that i can do update to server.

Thanks for your information