我一直在评估
NOSTRA的
Universal-Image-Loader库以异步下载图像并在ListView中显示它们.到目前为止,除了一个问题之外,它的工作正常
有时,当列表被滚动时,内存缓存中的位图会附加到错误的ImageView中.滚动停止后,将附加正确的图像.这种情况是相当罕见的,我找不到100％的方式来复制它.我最后一次发生了video.
这是ArticleAdapter代码,可以在那里找到UIL配置和bindView()方法.
public class ArticleAdapter extends CursorAdapter {
private LayoutInflater inflater;
private ViewHolder holder;
public ArticleAdapter(Context context,Cursor cursor,boolean autoRequery) {
super(context,cursor,autoRequery);
imageLoader = ImageLoader.getInstance();
DisplayImageOptions options = new DisplayImageOptions.Builder()
.showStubImage(R.drawable.download_progress_thumb)
.cacheInMemory()
.cacheOnDisc()
.imageScaleType(ImageScaleType.IN_SAMPLE_POWER_OF_2)
.build();
ImageLoaderConfiguration configuration = new ImageLoaderConfiguration.Builder(context)
.threadPriority(Thread.NORM_PRIORITY - 2)
.threadPoolSize(4)
.discCache(new UnlimitedDiscCache(Utils.getCacheDirectory(context)))
.defaultDisplayImageOptions(options)
.build();
imageLoader.init(configuration);
titleIndex = cursor.getColumnIndex(Articles.TITLE);
descriptionIndex = cursor.getColumnIndex(Articles.DESCRIPTION);
isUnreadIndex = cursor.getColumnIndex(Articles.IS_UNREAD);
isNewIndex = cursor.getColumnIndex(Articles.IS_NEW);
urlIndex = cursor.getColumnIndex(Articles.URL);
hostIndex = cursor.getColumnIndex(Articles.HOST);
timeIndex = cursor.getColumnIndex(Articles.PUBLISH_TIME);
bkgUnreadArticle = context.getResources().getColor(R.color.list_bkg_unread_article);
bkgReadArticle = context.getResources().getColor(R.color.list_bkg_read_article);
textUnreadTitle = context.getResources().getColor(R.color.list_text_unread_title);
textReadTitle = context.getResources().getColor(R.color.list_text_read_title);
inflater = LayoutInflater.from(context);
}
@Override
public void bindView(View view,Context context,Cursor cursor) {
String date = Utils.format(cursor.getLong(timeIndex),Utils.DATE);
holder = (ViewHolder) view.getTag();
holder.titleView.setText(cursor.getString(titleIndex));
holder.descriptionView.setText(date);
int isNew = cursor.getInt(isNewIndex);
if (isNew == 1)
holder.isNewView.setVisibility(View.VISIBLE);
else
holder.isNewView.setVisibility(View.INVISIBLE);
int isUnread = cursor.getInt(isUnreadIndex);
if (isUnread == 1){
holder.titleView.setTextColor(textUnreadTitle);
holder.rowLayout.setBackgroundColor(bkgUnreadArticle);
} else {
holder.titleView.setTextColor(textReadTitle);
holder.rowLayout.setBackgroundColor(bkgReadArticle);
}
String url = cursor.getString(urlIndex);
String host = cursor.getString(hostIndex);
if (host.equalsIgnoreCase(Consts.HOST_LENTA) || host.equalsIgnoreCase(Consts.HOST_REALTY)) {
holder.thumbView.setVisibility(View.VISIBLE);
imageLoader.displayImage(Utils.makeImageUrl(url,Utils.THUMBNAIL),holder.thumbView);
} else
holder.thumbView.setVisibility(View.GONE);
}
@Override
public View newView(Context context,ViewGroup parent) {
View v = inflater.inflate(R.layout.articlelist_item,null);
ViewHolder holder = new ViewHolder();
holder.titleView = (TextView) v.findViewById(R.id.list_title);
holder.descriptionView = (TextView) v.findViewById(R.id.list_description);
holder.thumbView = (ImageView) v.findViewById(R.id.list_thumb);
holder.isNewView = (TextView) v.findViewById(R.id.list_read_unread);
holder.rowLayout = (LinearLayout) v.findViewById(R.id.list_row);
v.setTag(holder);
return v;
}
}
我真的很感谢任何关于这件事的帮助.
