如何迭代整个android listview

I have a listview where user choose how much for each item he wants, so I need to iterate over each row to get the name (Ovo, Presunto, Queijo, etc), the quantity (the number between the "+" and "-" buttons) and the price. This is already working fine, but I have the following problem: If you look at the bottom of the listview you can know that there are more items, in this picture there are 9 items, but there are 15, and if the user scrolls I will can not iterate over the "hidden" items of listview. I have a listview where user choose how much fo