我正在尝试用图像和Text填充列表视图。我使用volley框架从网络中获取数据。但问题是，当我向下滚动时，图像视图为空一秒钟，然后显示缓存图像..我希望缓存的图像始终显示在列表中。
代码：
public class SearchAdapterItem extends ArrayAdapter<SearchResultData>
{
Context context;
int layoutResourceId;
private ArrayList<SearchResultData> objects;
LayoutInflater inflater;
ImageLoader mImageLoader = new ImageLoader(ApplicationController.getInstance().getRequestQueue(), new BitmapLruCache());
public SearchAdapterItem(Context context, int layoutResourceId, ArrayList <SearchResultData> objects)
{
super(context, layoutResourceId, objects);
this.context = context;
this.objects =objects;
this.layoutResourceId=layoutResourceId;
inflater = (LayoutInflater) getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
private class ViewHolder {
TextView txtTitle;
TextView txtDesc;
NetworkImageView imageicon;
int position;
}
public View getView(int position, View convertView, ViewGroup parent)
{
// assign the view we are converting to a local variable
ViewHolder holder= new ViewHolder();
// first check to see if the view is null. if so, we have to inflate it.
// to inflate it basically means to render, or show, the view.
if (convertView==null)
{
convertView = inflater.inflate(layoutResourceId,parent,false);
holder.txtTitle=(TextView) convertView.findViewById(R.id.search_listingtitle);
holder.imageicon= (NetworkImageView) convertView.findViewById(R.id.search_listingimage);
holder.position=position;
convertView.setTag(holder);
}
else
{
convertview.getTag();
}
SearchResultData i = objects.get(position);
if (i != null)
{
if (holder.txtTitle != null)
{
holder.txtTitle.setText(i.getListing_title());
try {
{
// holder.imageicon.setTag(i.getThumb_image());
holder.imageicon.setImageUrl(i.getThumb_image(), mImageLoader);
}
}
catch (Exception e)
{
e.printStackTrace();
}
}
}
return convertView;
}
}