listview gridview and their scrolls

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http://stackoverflow.com – I have 3 fragments in my activity 2 listviews and one gridview i put scroll listeners on the gridview and the listview when the listview is visible, the gridview is not, if i click a button the gridview slides in from the left and becomes visible, hiding most of the listview it seems that when i scroll the listview (when the gridview is not visible) the scroll listener for the gridview gets called along with the scroll listener for the listview why could this be happening? (HowTos)