我需要创建一个的ListView 键，以显示更多的信息，负荷消费显示更详细的布局只为所选行。下面是我的尝试是：

I need to create a ListView and show more detailed layout only for the selected row in order to show more information to the costumer. What I tried is below:

newsListView.setAdapter(new NewsListAdapter(this, news));
newsListView.setOnItemClickListener(new OnItemClickListener() {
    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

        LayoutInflater inflater = (LayoutInflater)getApplicationContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);

        //Here I tried to change layout of this row only
        view = inflater.inflate(R.layout.listitem_news_selected, null);
        TextView info = (TextView) view.findViewById(R.id.info);

        NewsData news = (NewsData) parent.getItemAtPosition(position);
        info.setText(news.getInfo());
    }
});

这里是 NewsListAdapter ：

public class NewsListAdapter extends BaseAdapter {

    List<NewsData> items;
    Activity context;

    /* private view holder class */
    private class ViewHolder {
        TextView title;
        ImageView image;
    }

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

        ViewHolder holder = null;

        LayoutInflater mInflater = (LayoutInflater) context.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);

        if (convertView == null) {
            convertView = mInflater.inflate(R.layout.listitem_news, null);
            holder = new ViewHolder();

            holder.title = (TextView) convertView.findViewById(R.id.title);
            holder.image = (ImageView) convertView.findViewById(R.id.imageView1);            

            convertView.setTag(holder);
        } else {
            holder = (ViewHolder) convertView.getTag();
        }

        NewsData news = items.get(position);

        holder.title.setText(news.getTitle());
        new DownloadImageTask(holder.image).execute(news.getImgUrl());

        return convertView;
    }
}

In这个问题，类似的问题被提出，但它并没有帮助我。我猜测，我需要做些什么适配器，但我被困在这里。任何想法将AP preciated。

In this question, similar question was asked but it didn't help me. I am guessing I need to do something with Adapter but I got stuck here. Any ideas will be appreciated.

推荐答案

你在做什么是不是在ListView项目的角度来看，你是膨胀未知的看法，甚至会改变。

What you are doing is not even gonna change the View of the ListView Item, you are inflating an unknown view.

解决方法：

有设定选择的项目的位置创建在适配器的方法：

create a method in your adapter for setting the position of the selected item:

public void selectedItem(int position)
{
   this.position = position; //position must be a global variable
}

在 getView 充气视图时的位置等于点击项目位置

in your getView inflate the view when the position is equals to the click item position

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

    ViewHolder holder = null;

    LayoutInflater mInflater = (LayoutInflater) context.getSystemService(Activity.LAYOUT_INFLATER_SERVICE);

    if (convertView == null) {
        convertView = mInflater.inflate(R.layout.listitem_news, null);
        holder = new ViewHolder();

        holder.title = (TextView) convertView.findViewById(R.id.title);
        holder.image = (ImageView) convertView.findViewById(R.id.imageView1);            

        convertView.setTag(holder);
    } else {
        holder = (ViewHolder) convertView.getTag();
    }

    NewsData news = items.get(position);

    holder.title.setText(news.getTitle());
    new DownloadImageTask(holder.image).execute(news.getImgUrl());

    if(this.position == position)
    {
        view2 = mInflater.inflate(R.layout.listitem_news_selected, null);
        TextView info = (TextView) view2.findViewById(R.id.info);

        info.setText(news.getInfo());

        return view2;
    }


    return convertView;
}

在使用它，你的 onItemClick

NewsListAdapter adapter = new NewsListAdapter(this, news);
newsListView.setAdapter(adapter );
newsListView.setOnItemClickListener(new OnItemClickListener() {
    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

          adapter.selectedItem(position);
          adapter.notifyDataSetChange();
    }
});

总是有一个引用/对象来您的适配器这样你就可以在点击它刷新的ListView。

always have a reference/object to your adapter so you can refresh your listView upon clicking on it.