设置listview中的某些元素不可单击

Question

要设置ListView的某些元素不可点击，我在自定义数组适配器中使用isEnabled方法，如下所示。奇怪的是，ListView本身的项目正确显示，但有些东西可点击。

可能有帮助的是，当我滚动时，突然Toast出现而不是在开头，给出的位置与不应该可点击的元素不对应并以黑色显示。 我有什么想法可以解决这个问题吗？

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

        View row = convertView;
        ViewHolder holder;
        Object sRO = getItem(position);

        title = sRO.getTitle();
        description = sRO.getDescription();
        isBuffered = sRO.getIsBuffered();

        if (row == null) {

            LayoutInflater inflater = (LayoutInflater) context
                    .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            row = inflater.inflate(layoutResourceId, parent, false);

            holder = new ViewHolder();
            holder.tvTitle = (TextView) row.findViewById(R.id.jText);
            holder.tvDescription = (TextView) row
                    .findViewById(R.id.jDescription);
            holder.checkbox = (CheckBox) row.findViewById(R.id.chk);

            row.setTag(holder);

        } else {

            holder = (ViewHolder) row.getTag();

        }

        if (isBuffered == true) {

            holder.tvTitle.setText(title);
            holder.tvDescription.setText(description);
            holder.tvTitle.setTextColor(Color.BLACK);
            holder.checkbox.setVisibility(View.VISIBLE);

        } else if (isBuffered == false) {

            holder.tvTitle.setText(title);
            holder.tvTitle.setTextColor(Color.RED);
            holder.tvDescription.setText(description
                    + " - not supported");
            holder.tvDescription.setTextColor(Color.RED);
            holder.checkbox.setVisibility(View.GONE);
        }

        return row;
    }

    @Override
    public boolean isEnabled(int position) {



        if (isBuffered == false ) {
            Toast.makeText(context, "false and "+position, Toast.LENGTH_SHORT).show(); 
            return false;
        } else {
            Toast.makeText(context, "true and "+position, Toast.LENGTH_SHORT).show(); 
            return true;
        }

    }