Changing text of Header when user clicks of an item.

[mdtarik]

I need to change the text of the pinned header when user clicks on an item. Suppose, user clicks on the first item, I need to show "1" in the pinned header, when user clicks on 2nd item on any group (means, items under that header), I need to show "2" in the pinned header.

My question is how can I get/access the header from an item's onClickListener? Is there any way like getHeaderViewByPosition(int section_position) ... or anything like this?