问题
When user click the group row, the children list is expanded and show. When i add any group item to Arraylist and call method notifyDataSetChanged(); Group Expanded Status wrong .. how to do fix
Example: Current group position 1 (parent 2) is expanded.. When i add group parent 0 to first and call notifyDataSetChanged(); . parent 2 is collapse and parent 1 is expanded. How to keep parent 2 expaded
Sorry my english not good.
回答1:
when you want add parent and of its children just before,
1.just take all current parents and their children in one temporarily list
2.clear current filled list.
3.add new parent and their children to list(that we clear).
4.now, add temporarily list to our current list(in which we add, new parent and their children)
5.now use new filled list to you expandable list adapter
6.clear your temporarily list.
来源：https://stackoverflow.com/questions/29738932/keep-group-expanded-status-when-change-data-expandable-list-view