android - 如何在 fragment 中拥有更多自定义适配器的项目？

Question

在我的 Fragment 中，我正在显示来自网络新闻页面的 RSS 提要，但我只能从 one 获取这些数据网址。然后我在我的 Custom Listview 中显示这个单一 Url 的数据。那么，有没有一种方法可以显示来自多个显示在不同 ListView 但在同一 Fragment 中的 Url 的数据？也许我问的不清楚，如果是的话请评论并检查我在下面制作的图片:

这是我的 fragment 中的代码:

try {
        URL rssUrl = new URL("URL1");
        SAXParserFactory mySAXParserFactory = SAXParserFactory.newInstance();
        SAXParser mySAXParser = mySAXParserFactory.newSAXParser();
        XMLReader myXMLReader = mySAXParser.getXMLReader();
        RSSHandler myRSSHandler = new RSSHandler();
        myXMLReader.setContentHandler(myRSSHandler);
        InputSource myInputSource = new InputSource(rssUrl.openStream());
        myXMLReader.parse(myInputSource);

        myRssFeed = myRSSHandler.getFeed();

    } catch (MalformedURLException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (ParserConfigurationException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (SAXException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    } catch (IOException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }


    if (myRssFeed!=null)
    {
        ListView list = (ListView)view.findViewById(android.R.id.list);
        CustomList adapter = new CustomList(getActivity(),myRssFeed.getList());
        adapter.addAll();
        list.setAdapter(adapter);

    }
    else
        Toast.makeText(getActivity(), "....",
                Toast.LENGTH_LONG).show();
    return view;
}

编辑Url 的自定义 ListView:

public class CustomList extends ArrayAdapter<RSSItem> {

private static Activity context = null;
private final List<RSSItem> web;
private SharedPreferences mPrefs;
final String read2 = "text1";
final String testoread2 = "img1";

public CustomList(Activity context, List<RSSItem> web) {
    super(context, R.layout.custom_list, web);
    CustomList.context = context;
    this.web = web;
}
@Override
public View getView(int position, View view, ViewGroup parent) {
    LayoutInflater inflater = context.getLayoutInflater();
    final View rowView = inflater.inflate(R.layout.custom_list, null, true);
    mPrefs = PreferenceManager.getDefaultSharedPreferences(context);

    if (android.os.Build.VERSION.SDK_INT > 9) {
        StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
        StrictMode.setThreadPolicy(policy);
    }

    ....


    return rowView;

}

如有任何建议，我们将不胜感激。

编辑2我现在拥有的:

try {
        URL rssUrl = new URL("URL1");
        URL rssUrl2 = new URL("URL2");
        SAXParserFactory mySAXParserFactory = SAXParserFactory.newInstance();

        SAXParser mySAXParser = mySAXParserFactory.newSAXParser();
        SAXParser mySAXParser2 = mySAXParserFactory.newSAXParser();

        XMLReader myXMLReader = mySAXParser.getXMLReader();
        XMLReader myXMLReader2 = mySAXParser2.getXMLReader();

        RSSHandler myRSSHandler = new RSSHandler();
        RSSHandler2 myRSSHandler2 = new RSSHandler2();

        myXMLReader.setContentHandler(myRSSHandler);
        myXMLReader2.setContentHandler(myRSSHandler2);

        InputSource myInputSource = new InputSource(rssUrl.openStream());
        InputSource myInputSource2 = new InputSource(rssUrl2.openStream());

        myXMLReader.parse(myInputSource);
        myXMLReader2.parse(myInputSource2);

        myRssFeed = myRSSHandler.getFeed();
        myRssFeed2 = myRSSHandler2.getFeed();

Answer 1

不是将 ListView 放在 xml 中，而是动态加载它:

ListView list = new ListView(this);
CustomList adapter = new CustomList(getActivity(),myRssFeed.getList());
adapter.addAll();
list.setAdapter(adapter);

然后在您的 xml 中放置一个具有这些属性的 LinearLayout:

android:id="@+id/layoutMain"
android:orientation="vertical"
android:layout_height="wrap_content"

回到 Java - 将 ListView 添加到 LinearLayout:

LinearLayout layoutMain = (LinearLayout)findViewById(R.id.layoutMain);
layoutMain.addView(list);

重复此步骤几次以使用多个列表填充您的 fragment

编辑:

关于 RssHandlers - 请创建一个函数来处理这些:

RSSHandler createRssHandler(SAXParserFactory mySAXParserFactory, String url)
{
    URL rssUrl = new URL(url);
    SAXParser mySAXParser = mySAXParserFactory.newSAXParser();
    XMLReader myXMLReader = mySAXParser.getXMLReader();
    RSSHandler myRSSHandler = new RSSHandler();
    myXMLReader.setContentHandler(myRSSHandler);
    InputSource myInputSource = new InputSource(rssUrl.openStream());
    myXMLReader.parse(myInputSource);

   return myRSSHandler;
}

现在你可以将它与数组一起使用了:

String[] urls = new String["url1", "url2"];
RssHandlers[] handlers = new RssHandlers[urls.length];

for (int i = 0; i < urls.length; i++)
{
     handlers[i] = createRssHandler(mySAXParserFactory, urls[i]); 
} 

将它与您的列表结合起来会得到类似的结果:

String[] urls = new String["url1", "url2"];
RssHandlers[] handlers = new RssHandlers[urls.length];
LinearLayout layoutMain = (LinearLayout)findViewById(R.id.layoutMain);

for (int i = 0; i < urls.length; i++)
{
     handlers[i] = createRssHandler(mySAXParserFactory, urls[i]); 

     ListView list = new ListView(this);
     CustomList adapter = new CustomList(getActivity(), handlers[i].getList());
     adapter.addAll();
     list.setAdapter(adapter);
     layoutMain.addView(list);
}