Java androd ExpandableListView checkbox in group view

I used a ExpandableListView , in group view in layout I have a textView and checkbox , but when I setSelected a checkbox doesn't remeber this , when I changed state a checkbox I save in realm , but when I open my activity doesn't set select on true checkbox. This is my adapter :

public class CustomExpandableListAdapter extends BaseExpandableListAdapter {

    private Context context;
    private List<String> expandableListTitle;
    private HashMap<String, List<String>> expandableListDetail;
    public static ArrayList<Integer> selected = new ArrayList<>();
    private Realm realm = Realm.getDefaultInstance();

    public CustomExpandableListAdapter(Context context, List<String> expandableListTitle,
                                       HashMap<String, List<String>> expandableListDetail) {
        this.context = context;
        this.expandableListTitle = expandableListTitle;
        this.expandableListDetail = expandableListDetail;
    }

    @Override
    public Object getChild(int listPosition, int expandedListPosition) {
        return this.expandableListDetail.get(this.expandableListTitle.get(listPosition))
                .get(expandedListPosition);
    }

    @Override
    public long getChildId(int listPosition, int expandedListPosition) {
        return expandedListPosition;
    }

    @Override
    public View getChildView(int listPosition, final int expandedListPosition,
                             boolean isLastChild, View convertView, ViewGroup parent) {
        final String expandedListText = (String) getChild(listPosition, expandedListPosition);
        if (convertView == null) {
            LayoutInflater layoutInflater = (LayoutInflater) this.context
                    .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            convertView = layoutInflater.inflate(R.layout.list_item, null);
        }
        TextView expandedListTextView = (TextView) convertView
                .findViewById(R.id.expandedListItem);
        expandedListTextView.setText(expandedListText);
        return convertView;
    }

    @Override
    public int getChildrenCount(int listPosition) {
        return this.expandableListDetail.get(this.expandableListTitle.get(listPosition))
                .size();
    }

    @Override
    public Object getGroup(int listPosition) {
        return this.expandableListTitle.get(listPosition);
    }

    @Override
    public int getGroupCount() {
        return this.expandableListTitle.size();
    }

    @Override
    public long getGroupId(int listPosition) {
        return listPosition;
    }

    @Override
    public View getGroupView(final int listPosition, boolean isExpanded, View convertView, ViewGroup parent) {
        SharedPreferences pref = context.getSharedPreferences("MAIN_PREF", MODE_PRIVATE);
        final SharedPreferences.Editor editor = pref.edit();
        final String listTitle = (String) getGroup(listPosition);
        final boolean[] sel = {RealmController.getGroup(listTitle, realm).isSelect()};
        if (convertView == null) {
            LayoutInflater layoutInflater = (LayoutInflater) this.context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
//            convertView = layoutInflater.inflate(R.layout.list_group, null);

            convertView = layoutInflater.inflate(R.layout.holder_layout, null);
        }
//        TextView listTitleTextView = (TextView) convertView
//                .findViewById(R.id.listTitle);

        TextView listTitleTextView = (TextView) convertView.findViewById(R.id.showText);
        final CheckBox checkBox = (CheckBox) convertView.findViewById(R.id.checkBoxHolder);
//        if (pref.getInt(listTitle, 0) == 1) {
//            checkBox.setSelected(true);
//        } else {
//            checkBox.setSelected(false);
//        }
        checkBox.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                if (checkBox.isSelected()) {
                    checkBox.setSelected(false);
                    RealmResults<ObjectsInGroupRealm> objectsInGroupRealms = RealmController.getObjects(realm, listTitle);
                    int position = -1;
                    for (ObjectDefExtends objectDefExtends : Singleton.getInstance().getListaODE()) {
                        for (ObjectsInGroupRealm o : objectsInGroupRealms) {
                            if (o.getName().equals(objectDefExtends.name)) {
                                position = Singleton.getInstance().getListaODE().indexOf(objectDefExtends);
                                Singleton.getInstance().getListaODE().get(position).visible = false;
                                editor.putInt(Singleton.getInstance().getListaODE().get(position).id.toString(), 0);
                                editor.apply();
//                                RealmController.updateGroup(o.getName(),false,realm);

                            }
                        }
                    }
//                    editor.putInt(listTitle, 0);
//                    editor.apply();
                    selected.remove(Integer.valueOf(listPosition));
                } else {
                    checkBox.setSelected(true);
                    selected.add(listPosition);
                    RealmResults<ObjectsInGroupRealm> objectsInGroupRealms = RealmController.getObjects(realm, listTitle);
                    int position = -1;
                    for (ObjectDefExtends objectDefExtends : Singleton.getInstance().getListaODE()) {
                        for (ObjectsInGroupRealm o : objectsInGroupRealms) {
                            if (o.getName().equals(objectDefExtends.name)) {
                                position = Singleton.getInstance().getListaODE().indexOf(objectDefExtends);
                                Singleton.getInstance().getListaODE().get(position).visible = false;
                                editor.putInt(Singleton.getInstance().getListaODE().get(position).id.toString(), 1);
                                editor.apply();
                                RealmController.updateGroup(o.getName(),true,realm);
                                sel[0] =true;
                                checkBox.setSelected(true);
//                                notifyDataSetChanged();
                            }
                        }
                    }
//                    editor.putInt(listTitle, 1);
//                    editor.apply();
                }
//                notifyDataSetChanged();

            }
        });
        listTitleTextView.setTypeface(null, Typeface.BOLD);
        listTitleTextView.setText(listTitle);
        checkBox.setSelected(sel[0]);
        return convertView;
    }

    @Override
    public boolean hasStableIds() {
        return false;
    }

    @Override
    public boolean isChildSelectable(int listPosition, int expandedListPosition) {
        return true;
    }
}