Moving Focus to GridView's first item view

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http://stackoverflow.com – In my activity i have two fragments 1st one contains a linearlayout and second one contains a gridview and i have to support D-pad navigation in my app. now when user press key to movetowards grid view i want to show the 1st item of gridview as selected view so every time when focus moves from linearlayout to gridview , gridview's first item should get selected/focused any leads on these is highly appreciated (HowTos)