java.lang.IndexOutOfBoundsException: Invalid index 6 size is 6

[sonvp]

Hi @ayalma . I test it with your demo and I add Log in method getGroupItem(int position). I receive bug with Log below
06-09 16:33:03.516 18316-18316/ayalma.ir.sample D/getGroupItem: 0
06-09 16:33:03.521 18316-18316/ayalma.ir.sample D/getGroupItem: 1
06-09 16:33:03.521 18316-18316/ayalma.ir.sample D/getGroupItem: 2
06-09 16:33:03.526 18316-18316/ayalma.ir.sample D/getGroupItem: 3
06-09 16:33:03.526 18316-18316/ayalma.ir.sample D/getGroupItem: 4
06-09 16:33:03.526 18316-18316/ayalma.ir.sample D/getGroupItem: 5
06-09 16:33:03.531 18316-18316/ayalma.ir.sample D/getGroupItem: 6

[704480904]

@OverRide
public int getItemViewType(int i) {
int group = 0;
while (group <= getGroupItemCount()) {
if (i > 0 && !isExpanded(group)) {
i--;
group++;
continue;
}
if (i > 0 && isExpanded(group)) {
i--;
if (i < getChildItemCount(group)) return getChildItemViewType(group, i);
i -= getChildItemCount(group);
group++;
continue;
}
if (i == 0) return TYPE_HEADER;
}
throw new IndexOutOfBoundsException();

应该是是因为添加了一个header 导致