How to add the friend with checkbox in android

Hi In the below code I am using custom adapter to display the name with image and checkbox.Now,My problem is based on friend position I want to add with checkbox.

My layout like this:

image friendname with checkbox

Now, I want based on friend postion I want to return the checkbox is added to friend or not.suppose if I am selecting the username:user1 this one got checked.then I want to return username with checked postion for that I am using listview.

java

private class FriendListAdapter extends BaseAdapter 
    {       
        class ViewHolder {
            TextView text;
            ImageView icon;
            CheckBox check1;



        }
        private LayoutInflater mInflater;
        private Bitmap mOnlineIcon;
        private Bitmap mOfflineIcon;        

        private FriendInfo[] friends = null;




        public FriendListAdapter(Context context) {
            super();            

            mInflater = LayoutInflater.from(context);

            mOnlineIcon = BitmapFactory.decodeResource(context.getResources(), R.drawable.greenstar);
            mOfflineIcon = BitmapFactory.decodeResource(context.getResources(), R.drawable.redstar);

        }

        public void setFriendList(FriendInfo[] friends)
        {
            this.friends = friends;

        }


        public int getCount() {     

            return friends.length;
        }


        public FriendInfo getItem(int position) {           

            return friends[position];
        }

        public long getItemId(int position) {

            return 0;
        }

        public View getView(final int position, View convertView, ViewGroup parent) {

            final ViewHolder holder;


            if (convertView == null) 
            {
                convertView = mInflater.inflate(R.layout.grouplist, null);


                holder = new ViewHolder();
                holder.text = (TextView) convertView.findViewById(R.id.text);
                holder.icon = (ImageView) convertView.findViewById(R.id.icon);
                holder.check1 = (CheckBox) convertView.findViewById(R.id.checkBox1);

                convertView.setTag(holder);

            }           

            else {

                holder = (ViewHolder) convertView.getTag();
            }


            holder.text.setText(friends[position].userName);
            holder.icon.setImageBitmap(friends[position].status == STATUS.ONLINE ? mOnlineIcon : mOfflineIcon);
            holder.check1.setChecked(checkBoxState[position]);

            holder.check1.setOnCheckedChangeListener(new OnCheckedChangeListener() {



                @Override
                public void onCheckedChanged(CompoundButton buttonView,
                        boolean isChecked) {
                    checkBoxState[position] = isChecked;

                }

            });


            return convertView;
        }

    }