gistfile1.java

ExpandableListAdapter adapter = expandableListView.getExpandableListAdapter();

int groupCount = adapter.getGroupCount();
for(int i=0; i < groupCount; i++) {
	int childCount = adapter.getChildrenCount(i);
	View groupView = adapter.getGroupView(i, false, null, expandableListView);
	CheckBox cbGroupSelected = (CheckBox) groupView.findViewById(R.id.cb_group_selected);
	cbGroupSelected.setOnCheckedChangeListener(this);

	for(int j=0; j < childCount; j++) {
		View childView = adapter.getChildView(i, j, false, null, expandableListView);
		CheckBox cbChildSelected = (CheckBox) childView.findViewById(R.id.cb_child_selected);
		cbChildSelected.setOnCheckedChangeListener(this);
	}
}