How to auto select checkbox in Expandable view Android

I am able to get selected check box value in Expandable view. Now I want to auto selected these check box again if their value exists in array.

I am getting clicked checkbox value as pair(groipId, childId). So when user click edit, I want these check box auto select. All of my data coming from some API.

This is the code for getting select box value.

    final CheckBox cb = (CheckBox) convertView.findViewById(R.id.childCkBox);
    // add tag to remember groupId/childId
    final Pair<Long, Long> tag = new Pair<Long, Long>(
            getGroupId(groupPosition),
            getChildId(groupPosition, childPosition));

    cb.setTag(tag);
    // set checked if groupId/childId in checked items
    cb.setChecked(mCheckedItems.contains(tag));
    // set OnClickListener to handle checked switches
    cb.setOnClickListener(new View.OnClickListener() {

        public void onClick(View v) {
            final CheckBox cb = (CheckBox) v;
            final Pair<Long, Long> tag = (Pair<Long, Long>) v.getTag();
            if (cb.isChecked()) {
                mCheckedItems.add(tag);
            } else {
                mCheckedItems.remove(tag);
            }
        }
    });
    txtListChild.setText(childText);

    public Set<Pair<Long, Long>> getCheckedItems() {
     return mCheckedItems;
    }

Editing and suggesting are welcome.