ListView Images showed only when visible

Question

I have a ListView that loads images to the ImageView asynchronously. To achieve this i am using Android-Universal-Image-Loader

But i would like to start loading this images only when they are visible in the listview. For example if the visible items of the listview are from 5 to 9, only those should be loaded. Also if the user scrolls very fast the ListView only when stopped those items should be loaded. What is the best way to this?

Answer 1

If you use "view reusing" in your listview adapter then you shouldn't do anything. UIL do it for you. UIL won't load ALL scrolled images, only those which are got in task pool (you can set set pool size in configuration). If you use "view reusing" then images which were scrolled fast won't be loaded. Look into example project on GitHub.

UPD: Since 1.7.0 version UIL have PauseOnScrollListener.

boolean pauseOnScroll = true;
boolean pauseOnFling = true;
listView.setOnScrollListener(new PauseOnScrollListener(pauseOnScroll, pauseOnFling));