Create expandable listview with group and child checkbox

Question

I want to create an expandable listview with checkboxes present in the groups as well as the children. What I want is, the user may check the group in order to select all th

Answer 1

Try this sample Code Expandable CheckList

Answer 2

To do this you will need to include boolean flag in each object, or in you adapter create two list views (for groups and items) that will contain selected items.

I would rather add boolean like this :

class Group{ ...

  boolean isSelected;
}

class Item { ...

  boolean isSelected;
}

Then in Adapter in getViews() methods:

getItemView(...){
  ...
  itemHolder.checkbox.setSelected(item.isSelected)
}

getGroupView(...){
  ...
  groupHolder.checkbox.setSelected(group.isSelected)

  //add lisener
  itemHolder.checkbox.setOnCheckedChangeListener(lisener);
}

And on group check you can do something like this :

void selectGroup(Group group){
  for(Item item: group.getItems()){
      item.isSelected = true;
  }

  //update your list
  notifiDataSetChanged();
}

That's all what you need

UPDATE :

• Android Developers - UI
• Android Holder Pattern