Android LongClickListener on ExpandableListView group items

Question

I created an ExpandableListView with the help of this tutorial: link. I understand the code more or less and been trying to set a longclicklistener on the groups.

There is a setOnChildClickListener on the child items already and I managed to set a longclicklistener on them:

exList.setOnItemLongClickListener(new OnItemLongClickListener() {
      @Override
      public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) {
          if (ExpandableListView.getPackedPositionType(id) == ExpandableListView.PACKED_POSITION_TYPE_CHILD) {
              groupPosition = ExpandableListView.getPackedPositionGroup(id);
              childPosition = ExpandableListView.getPackedPositionChild(id);
//[....]
 return false;
      }
  });  

How can I set a longclicklistener on the group items?

I know the code is hard to read so I created a sample project and uploaded it to here. This has no onlongclicklistener on the childs, since this is almost the original from the above link. I would appreciate if someone could help me with this.

Answer 1

Group items are a subset of all items, so the method above should be called in either case. You'd then use getPackedPositionType as above to figure out if the selected item is a group, an item, or null.

The code for this would be:

exList.setOnItemLongClickListener(new OnItemLongClickListener() {
      @Override
      public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) {
          int itemType = ExpandableListView.getPackedPositionType(id);

          if ( itemType == ExpandableListView.PACKED_POSITION_TYPE_CHILD) {
              childPosition = ExpandableListView.getPackedPositionChild(id);
              groupPosition = ExpandableListView.getPackedPositionGroup(id);

              //do your per-item callback here
              return retVal; //true if we consumed the click, false if not

          } else if(itemType == ExpandableListView.PACKED_POSITION_TYPE_GROUP) {
              groupPosition = ExpandableListView.getPackedPositionGroup(id);
              //do your per-group callback here
              return retVal; //true if we consumed the click, false if not

          } else {
              // null item; we don't consume the click
              return false;
          }
  });

If it's a group, you'll use getPackedPositionGroup as above to get the group ID that is being long-pressed. If it's an item, you'll use the combination of getPackedPositionGroup and getPackedPositionChild.