我正在尝试用示例代码在android.Help me的在线XML文件中检索span类中的值

import android.os.AsyncTask;
import android.util.Log;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;

public class XMLParserTask extends AsyncTask<String, Void, String> {

    @Override
    protected String doInBackground(String... urls) {
        try {
            URL url = new URL(urls[0]);
            HttpURLConnection connection = (HttpURLConnection) url.openConnection();
            connection.setRequestMethod("GET");
            connection.connect();

            InputStream inputStream = connection.getInputStream();
            DocumentBuilderFactory documentBuilderFactory = DocumentBuilderFactory.newInstance();
            DocumentBuilder documentBuilder = documentBuilderFactory.newDocumentBuilder();
            Document document = documentBuilder.parse(inputStream);

            Element rootElement = document.getDocumentElement();
            NodeList nodeList = rootElement.getElementsByTagName("span");

            for (int i = 0; i < nodeList.getLength(); i++) {
                Node node = nodeList.item(i);
                if (node.getNodeType() == Node.ELEMENT_NODE) {
                    Element element = (Element) node;
                    String value = element.getTextContent();
                    Log.d("XMLParser", "Value: " + value);
                }
            }

            inputStream.close();
        } catch (Exception e) {
            Log.e("XMLParser", "Error: " + e.getMessage());
        }
        return null;
    }
}

String xmlUrl = "http://example.com/your-xml-file.xml";
new XMLParserTask().execute(xmlUrl);