Android :: Android - Displaying Specific Contacts Information

In my application when a user clicks on a button I want to open the contacts application and display a particular contacts information. At the minute I have this:

Intent intent = new Intent(Intent.ACTION_VIEW, People.CONTENT_URI);
startActivity(intent);

This displays the contact application with all the contacts displayed. But how do I get it to display just one contact according to the contacts name or number?

This Code works: (answer)
Uri contactUri = ContentUris.withAppendedId(People.CONTENT_URI, 23);
Intent intent = new Intent(Intent.ACTION_VIEW, contactUri);
startActivity(intent);