在安卓的列表视图(标题，pubdata)中加载Rss数据

Question

我是安卓新手，我只是想将 rss（xml 数据）加载到 listview，我需要在列表视图上添加标题和发布数据...我正在列表视图中加载标题，但不知道如何加载发布日期。请帮我同样的.....提前感谢...

这是一个代码,,,标题正在成功加载，需要在列表视图中加载日期。在单行上

尝试 {

             URL url = new URL("rss link <contain title,pubDate tag> ");

             XmlPullParserFactory factory = XmlPullParserFactory.newInstance();
             factory.setNamespaceAware(false);
             XmlPullParser xpp = factory.newPullParser();

             xpp.setInput(getInputStream(url), "UTF_8");
             boolean insideItem = false;

             int eventType = xpp.getEventType();
             while (eventType != XmlPullParser.END_DOCUMENT) {
                 if (eventType == XmlPullParser.START_TAG) {
                     if (xpp.getName().equalsIgnoreCase("item")) {
                         insideItem = true;
                     } else if (xpp.getName().equalsIgnoreCase("title")) {
                         if (insideItem)
                             headlines.add(xpp.nextText()); //extract the headline
                     } else if (xpp.getName().equalsIgnoreCase("link")) {
                         if (insideItem)
                             links.add(xpp.nextText()); //extract the link of article
                     } else if (xpp.getName().equalsIgnoreCase("pubDate")) {
                         if (insideItem)
                             pd.add(xpp.nextText()); //extract the pub date of article
                     }
                 }else if(eventType==XmlPullParser.END_TAG && xpp.getName().equalsIgnoreCase("item")){
                     insideItem=false;
                 }
                 eventType = xpp.next(); //move to next element
             }
         } catch (MalformedURLException e) {
             e.printStackTrace();
         } catch (XmlPullParserException e) {
             e.printStackTrace();
         } catch (IOException e) {
             e.printStackTrace();
         }
         // Binding data
         ArrayAdapter adapter = new ArrayAdapter(this,
                 android.R.layout.simple_expandable_list_item_1, headlines);
         setListAdapter(adapter);

     }

Answer 1

在编码之前，请阅读以下内容

ListView 的回收机制如何运作

http://developer.android.com/training/improving-layouts/smooth-scrolling.html

您可以使用自定义适配器

listview.setAdapter (new CustomAdapter(ActivityName.this,R.layout.customlayout,pub,headlines));

然后

public class CustomAdapter extends ArrayAdapter
{
  ArrayList<String> pub,headlines;
  LayoutInflater mInlfater;   
  public CUstomAdapter(Context context,int layout,ArrayList<String> pub,ArrayList<String> headlines)
  {
      super(context,layout,pub);
      mInflater = LayoutInflater.from(context);
      this.pub= pub;
      this.headlines = headlines;  
  }
  @Override
  public View getView(int position, View convertView, ViewGroup parent) {
   ViewHolder holder; 
   if (convertView == null) {
    convertView = mInflater.inflate(R.layout.list_row, parent,false);
    holder = new ViewHolder();
    holder.tv1 = (TextView) convertView.findViewById(R.id.textView1);
    holder.tv2 = (TextView) convertView.findViewById(R.id.textView2);
    convertView.setTag(holder);
   }
   else {
    // view already exists, get the holder instance from the view
    holder = (ViewHolder) convertView.getTag();
   }
    holder.tv1.setText(pub.get(position).toString());
    holder.tv2.setText(headlines.get(position).toString());
    return convertView
   }
    static class ViewHolder {
      TextView tv1;
      TextView tv2;
    }  
}

list_item.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" >
    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_alignParentTop="true"
        android:layout_marginLeft="32dp"
        android:layout_marginTop="44dp"
        android:text="TextView" />
    <TextView
        android:id="@+id/textView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBottom="@+id/textView1"
        android:layout_alignParentRight="true"
        android:layout_marginRight="64dp"
        android:text="TextView" />
</RelativeLayout>

Answer 2

您需要创建一个 CustomArrayAdapter 并将两个数组传递给该适配器。

覆盖适配器中的getView方法，该方法基于它为您提供位置，创建一个具有两个文本视图的视图并分别设置它们。

请按照以下步骤了解有关自定义阵列适配器的详细信息：

https://devtut.wordpress.com/2011/06/09/custom-arrayadapter-for-a-listview-android/