Give some idea.
There is a tutorial of lazy loading with image. You should check that out
http://ballardhack.wordpress.com/2010/04/05/loading-remote-images-in-a-listview-on-android/
Here is some demo of lazy listview from GitHub.
https://github.com/thest1/LazyList
Hope those can help !!
[Credit go to original author of code and tutorial]