Deleting item on arraylist with checkbox

I am trying to delete an item from an arraylist called arrayofTask by having checked a checkbox. I have tried many ways to accomplish this, but have been unsuccessful.

Visit https://imgur.com/gallery/oRdhpGR which is where i uploaded a picture of my listview which i add a task and description with an add button.

what i am trying to do is delete such task and description with the click of the checkbox

bellow is what i have been trying to do but i dont know how to proceed.

    listView.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
        @Override
        public void onItemSelected(AdapterView<?> parent, View view, final int position, long id) {
            checkBox.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    if (checkBox.isChecked()){
                        arrayOfTask.remove(position);
                        adapter.notifyDataSetChanged();
                    }
                }
            });
        }

this is my custom adapter

public class userAdapter extends ArrayAdapter<user> {
    public  userAdapter(Context context, ArrayList<user> users){
        super(context,0,users);
    }
    @Override
    public View getView(int position, View convertView, ViewGroup parent){
        final user User = getItem(position);


        CheckBox checkbox;

        if(convertView == null){
            convertView = LayoutInflater.from(getContext()).inflate(R.layout.list_item,parent,false);
        }

        ///this new
        checkbox = (CheckBox) convertView.findViewById(R.id.checkbox);
        ///above
        TextView tvTask = (TextView) convertView.findViewById(R.id.task);
        TextView tvDescription = (TextView) convertView.findViewById(R.id.description);

        tvTask.setText(User.task);
        tvDescription.setText(User.description);


        return convertView;
    }