java.lang.IndexOutOfBoundsException：索引8无效，大小为0

当我拖动列表并尝试显示所有列表项时，它给了我这样的错误。这是我在后台工作的AsyncTask。请给一些错误免费提示.... 这asyncTask在几秒钟内由服务调用。java.lang.IndexOutOfBoundsException：索引8无效，大小为0

@Override 
    protected ArrayList<HashMap<String, String>> doInBackground(
      String... args) { 
     String url = args[0]; 
     rssItems = rssParser.getRSSFeedItems(url); 
     FeedDBHandler rssDb = new FeedDBHandler(getApplicationContext()); 
     // RSSItem rssItem; 
     rssItems.size(); 
     Log.i("size", "size:" + rssItems.size()); 

     for (RSSItem item : rssItems) { 
      // creating new HashMap 
      HashMap<String, String> map = new HashMap<String, String>(); 

      // Truncating description 
      String description = item.getDescription(); 
      if (description.length() > 100) 
       description = description.substring(3, 97) + ".."; 

      // Store in database 
      rssItem = new RSSItem(item.getTitle(), item.getLink(), 
        item.getCategory(), description, item.getPubdate()); 

      // check if not exist -notify and insert 
      if (!rssDb.isExistItem(item.getLink())) { 
       createNotification(item.getTitle()); 
       rssDb.addFeed(rssItem); 
      } 
      createNotification(item.getTitle()); 
      if (map != null) { 
       map.put(TAG_TITLE, item.getTitle()); 
       map.put(TAG_LINK, item.getLink()); 
       map.put(TAG_CATEGORY, item.getCategory()); 
       map.put(TAG_DESRIPTION, description); 
       map.put(TAG_PUB_DATE, item.getPubdate()); 

       rssItemList.add(map); 
      } 
     } 

     return rssItemList; 
    } 

    @Override 
    protected void onPostExecute(ArrayList<HashMap<String, String>> rssItemList) { 
     ListAdapter adapter = new SimpleAdapter(AndroidRSSReaderList.this, 
       rssItemList, R.layout.rss_item_list_row, 
       new String[] { TAG_LINK, TAG_TITLE, TAG_DESRIPTION, 
         TAG_PUB_DATE }, new int[] { R.id.page_url, 
         R.id.title, R.id.link, R.id.pub_date }); 

     // updating listview 
     lv.setAdapter(adapter); 
     lv.deferNotifyDataSetChanged(); 
     // lv.onDataSetChanged(); 

     // dismiss the dialog after getting all products 
     // pDialog.dismiss(); 

    } 
}

在此先感谢...

来源

2013-10-31 AndyBoy

你有任何想法，为什么这个列表仍然包含您的HTTP呼叫后0元？ – bofredo

我没有使用http调用，请给我一些代码提示，所以我可以很清楚地理解.. 谢谢 – AndyBoy

首先，提供发生错误的位置非常有用。将问题缩小为一个体面的块。 – bofredo

@Override 
    protected void onPreExecute() { 
     super.onPreExecute(); 
     rssItemList.clear(); 
    } 

    @Override 
    protected ArrayList<HashMap<String, String>> doInBackground(
      String... args) { 
     // updating UI from Background Thread 
     FeedDBHandler rssDb = new FeedDBHandler(getApplicationContext()); 

     // listing all RSSItems from SQLite 
     List<RSSItem> rssList = rssDb.getAllItems(); 

     // loop through each RSSItem 
     for (int i = 0; i < rssList.size(); i++) { 

      RSSItem s = rssList.get(i); 

      // creating new HashMap 
      HashMap<String, String> map = new HashMap<String, String>(); 

      // adding each child node to HashMap key => value 
      map.put(TAG_TITLE, s.getTitle()); 
      map.put(TAG_LINK, s.getLink()); 
      map.put(TAG_CATEGORY, s.getCategory()); 
      map.put(TAG_DESRIPTION, s.getDescription()); 
      map.put(TAG_PUB_DATE, s.getPubdate()); 
      // adding HashList to ArrayList 
      rssItemList.add(map); 

     } 
     return rssItemList; 
    } 

    @Override 
    protected void onPostExecute(final ArrayList<HashMap<String, String>> rssItemList) { 
     runOnUiThread(new Runnable() { 
      public void run() { 

       ListAdapter adapter = new SimpleAdapter(
         AndroidRSSReaderList.this, rssItemList, 
         R.layout.rss_item_list_row, new String[] { 
           TAG_LINK, TAG_TITLE, TAG_PUB_DATE, 
           TAG_DESRIPTION }, new int[] { 
           R.id.page_url, R.id.title, R.id.pub_date, 
           R.id.link }); 

       // updating listview 
       setListAdapter(adapter); 
      } 
     }); 
    }

我已经通过一些变化来解决这个问题...

来源

2013-11-11 10:17:30 AndyBoy

java.lang.IndexOutOfBoundsException：索引8无效，大小为0

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