Scrolling In Listview With Different Cell Height

I have a listview and its rows have different heights. When I scroll up, rows appear to move up or down erratically. (I don't find the behavior when I scroll down) I suspect its

Solution 1:

In this case, setting the right item height did the trick :

How to set different heights for each row in a ListView?

Edit: oh, and make sure you recycle the items correctly :

ListView reusing views when ... I don't want it to