Get ExpandableGroup item

[raqfc]

I have a list of ExpandableGroups, each one with one child, i want to access the child to send some data, but i can't seem to do it through groupAdapter, can someone give me some help??

Just as some Context i have a header NegotiationExpandableHeader that extends ExpandableItem and my NegotiationHeaderItem( my binding), and my NegotiationItem as the child of the NegotiationExpandableHeader, my bindable for the item body.

NegotiationExpandableHeader
|
-> NegotiationItem
NegotiationExpandableHeader
|
-> NegotiationItem