带有多个根元素的Android XmlPullParser

Question

我从c＃背景和新的Android冰雹。我正试图解析从.NET生成的XML文件。它实际上是一个包含多个表的XMLDataSet。如下图所示

<XMLDataSet xmlns="http://tempuri.org/XMLDataSet.xsd"> 
    <table1> 
     <row1>value</row1> 
     <row2>value</row2> 
     <row3>value</row3> 
    </table1> 
    <table1> 
     <row1>value</row1> 
     <row2>value</row2> 
     <row3>value</row3> 
    </table1> 
    <table2> 
     <row1>value</row1> 
     <row2>value</row2> 
     <row3>value</row3> 
    </table2> 
    <table2> 
     <row1>value</row1> 
     <row2>value</row2> 
     <row3>value</row3> 
    </table2> 
</XMLDataSet> 

等等。 我想解析这个XML并获得“列表”。在c＃中，我使用XMLDataSet和xmlDataSet.Tables [“table1”]来解析它并获得一个列表。 但我无法使用XmlPullParser在andriod中解析具有多个根元素的XML。我遇到的所有示例都演示了如何解析单个根XML。有人可以帮助我解析具有多个根的XML文件。

Answer 1

试试这个..

import java.io.IOException; 
import java.net.MalformedURLException; 
import java.net.URL; 
import javax.xml.parsers.DocumentBuilder; 
import javax.xml.parsers.DocumentBuilderFactory; 
import javax.xml.parsers.ParserConfigurationException; 

import org.w3c.dom.Document; 
import org.w3c.dom.Element; 
import org.w3c.dom.Node; 
import org.w3c.dom.NodeList; 
import org.xml.sax.InputSource; 
import org.xml.sax.SAXException; 

import android.os.AsyncTask; 
import android.os.Build; 
import android.os.Bundle; 
import android.annotation.TargetApi; 
import android.app.Activity; 
import android.app.ProgressDialog; 
import android.view.Menu; 

public class NetActivity extends Activity { 

    String urls = "Your URL"; 

    // Progress dialog 
    ProgressDialog pDialog; 


    @TargetApi(Build.VERSION_CODES.HONEYCOMB) 
    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_net); 

     if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) 
      new XmlParsing(urls).executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR, new String[]{null}); 
     else 
      new XmlParsing(urls).execute(new String[]{null}); 


    } 

    @Override 
    public boolean onCreateOptionsMenu(Menu menu) { 
     // Inflate the menu; this adds items to the action bar if it is present. 
     getMenuInflater().inflate(R.menu.main, menu); 
     return true; 
    } 

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

     // variables passed in: 
     String urls; 
     // constructor 
     public XmlParsing(String urls) { 
      this.urls = urls; 
     } 

     @Override 
     protected void onPreExecute() { 
      pDialog = ProgressDialog.show(NetActivity.this, "Fetching Details..", "Please wait...", true); 
     } 


     @Override 
     protected String doInBackground(String... params) { 
      // TODO Auto-generated method stub 

      URL url; 
      try { 

       url = new URL(urls); 
       DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance(); 
       DocumentBuilder db = dbf.newDocumentBuilder(); 
       Document doc = db.parse(new InputSource(url.openStream())); 

       doc.getDocumentElement().normalize(); 

       NodeList nodeList = doc.getElementsByTagName("table1"); 

       for (int i = 0; i < nodeList.getLength(); i++) { 

        Node node = nodeList.item(i);  

        Element fstElmnt = (Element) node; 
        NodeList nameList = fstElmnt.getElementsByTagName("row1"); 
        Element nameElement = (Element) nameList.item(0); 
        nameList = nameElement.getChildNodes(); 

        System.out.println("row1 : "+(((Node) nameList.item(0)).getNodeValue())); 

       } 

       NodeList nodeList1 = doc.getElementsByTagName("table2"); 

       for (int i = 0; i < nodeList1.getLength(); i++) { 

        Node node = nodeList1.item(i);  

        Element fstElmnt = (Element) node; 
        NodeList nameList = fstElmnt.getElementsByTagName("row1"); 
        Element nameElement = (Element) nameList.item(0); 
        nameList = nameElement.getChildNodes(); 

        System.out.println("row1 : "+(((Node) nameList.item(0)).getNodeValue())); 

       } 

      } 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(); 
      } 


      return null; 
     } 

     @Override 
     protected void onPostExecute(String result) { 
      // Now we have your JSONObject, play around with it. 
      if (pDialog.isShowing()) 
       pDialog.dismiss(); 


     } 

    } 

}