add a list inside of a list

I have a list of objects and when a user clicks on one of them, I want to be able to display another list of objects that are inside that first object. D开发者_Python百科oes anyone know of any tutorials or advice? Thanks.

Thats probably what you are looking for: http://developer.android.com/reference/android/app/ExpandableListActivity.html

For example like this: http://mylifewithandroid.blogspot.com/2008/05/expandable-lists.html

Or just google a bit for Tutorials for ExpandableList.