long-click

MainActivity.java

        expandableListView.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
            @Override
            public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) {
                int itemType = ExpandableListView.getPackedPositionType(id);
                if (itemType == ExpandableListView.PACKED_POSITION_TYPE_GROUP) {
                    long packedPos = ((ExpandableListView) parent).getExpandableListPosition(position);
                    int groupPosition = ExpandableListView.getPackedPositionGroup(packedPos);
                    Date date = dinnerAdapter.getGroup(groupPosition);
                    final AlertDialog.Builder builder = addNewDinnerBuilder(view, date);
                    builder.show();
                    return true;
                }
                return false;
            }
        });