Custom listview footer in my custom adapter?

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http://stackoverflow.com – I'm curious if I can create a footer for my custom listview in my arrayAdapter class? What I'm hoping to get out of this footer are a subtotal, tax, and total textview that will automatically sum and do "math" on my listview's "Order" when new items are applied to it. Would doing it in the arrayAdapter be the best approach? Or should I do it inside the fragment? I was trying to do it inside the fragment but was running into difficulty with getting data from the row's of the listview. Just to clarify; the listview is inside its own fragment, it will be pretty alone aside from the textview (HowTos)