“基本”listView适配器问题

时间:2011-05-10 15:46:50

标签: android

我有一个列表视图,其中每一行由textview和imageview组成。我想在创建适配器时设置imageview的可见性。以下是相关的一段代码,我试图将第3行的imageview设置为VISIBLE状态(默认情况下,在我的lis_item_icon_text.xml文件中,所有文件都被设置为INVISIBLE)。你能告诉我如何实现这个目标吗? TIA。

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder holder;
        if (convertView == null) {
            convertView = mInflater.inflate(R.layout.list_item_icon_text,null);
            holder = new ViewHolder();
            holder.text = (TextView) convertView.findViewById(R.id.text);
            holder.icon = (ImageView) convertView.findViewById(R.id.icon);              
            convertView.setTag(holder);
        } else {
            holder = (ViewHolder) convertView.getTag();
        }
        holder.text.setText(data_text_array[position]);
        holder.icon.setImageBitmap(mIcon);
        if(position == 3) {
            holder.icon.setVisibility(View.VISIBLE);
        }
        return convertView;
    }

    static class ViewHolder {
        TextView text;
        ImageView icon;
    }

1 个答案:

答案 0 :(得分:0)

删除条件if(convertView == null)并比较position == 2而不是position == 3(bcoz定位从0开始)。

所以你的代码是:

@Override
    public View getView(int position, View convertView, ViewGroup parent) {
            ViewHolder holder;
            convertView = mInflater.inflate(R.layout.list_item_icon_text,null);
            holder = new ViewHolder();
            holder.text = (TextView) convertView.findViewById(R.id.text);
            holder.icon = (ImageView) convertView.findViewById(R.id.icon);  

            convertView.setTag(holder);
        holder.text.setText(data_text_array[position]);
        holder.icon.setImageBitmap(mIcon);
        if(position == 2) {
            holder.icon.setVisibility(View.VISIBLE);
        }
        return convertView;
    }

    static class ViewHolder {
        TextView text;
        ImageView icon;
    }