No focus in settings menu on D-PAD use

I am working on an开发者_如何学编程 Android handset that has a D-PAD.

Here is the scenario: 1) Open settings menu 2) Scroll to the bottom of the list using touch 3) Use D-PAD to scroll the list.

Problem: No focus/marker is shown when D-PAD is used to scroll the list items

I have tried to figure this out, but not able to find out the root cause. All suggestions/opinions/comments are welcome.