This is a cross platform class that extends xCustomListView and makes it "lazier". Lazy loading is explained here: https://www.b4x.com/android/forum/threads/b4x-xui-customlistview-lazy-loading-virtualization.87930/#content and here...
Your first post i can't scroll up or down with my finger. I will look into the second post. I do see a vertical scroller in the image. I will give it a try. Thanks.