How to make Expandable listView expand with animation?

Question

I'm trying to animate the way the expandable listView expands, but I can't find anything on the web on how to do that except for this: https://github.com/idunnololz/AnimatedExpandableListView/ and I'm not that professional so I can't understand how to implement it to my activity. Please if you know tell me how to add it my activity or another way to do so, thanks

Answer 1

Apply animation on OnGroupClickListener. You could do something like -

listView.setOnGroupClickListener(new OnGroupClickListener() {

        @Override
        public boolean onGroupClick(ExpandableListView parent, View v, int groupPosition, long id) {
            if (listView.isGroupExpanded(groupPosition)) 
                listView.collapseGroupWithAnimation(groupPosition);
            else 
                listView.expandGroupWithAnimation(groupPosition);
            return true;
        }

    });

Link to AnimatedExpandableListView library.