///Your list ,maybe a string list.

List

///generated AlphabetIndexGroup list, return your data string which used to get the fist letter tag.

List

///build your list view.

return AlphabetIndexListView(
stickHeader: true,
dataList: _groupContactList,
//sideBarAlphabet: kDefaultAlphabets,
groupBuilder: (String tag, int groupIndex) {
return _buildHeaderItem(tag);
},
childBuilder: (MemberModel data, int groupIndex, int childIndex) {
return _buildListsItem(data);
},
padding: const EdgeInsets.fromLTRB(0, 0, 0, 0),
);