URL을 통해 XML 태그에서 특정 값을 가져 오는 Android

Question

URL을 통해 XML 파일의 특정 태그 안에 포함 된 데이터를 가져 오려고합니다. 특정 태그는 start_address입니다. 이 경우 어떤 방법을 사용할 지 확신 할 수 없습니다. 여기에 내가

http://maps.googleapis.com/maps/api/directions/xml?origin=07306&destination=07306&sensor=false

에 연결하고 정확한 XML 파일에 대한 링크입니다 //

package com.example.xmlread; 

    import java.io.IOException; 
    import java.net.URL; 

    import org.xmlpull.v1.XmlPullParser; 
    import org.xmlpull.v1.XmlPullParserException; 
    import org.xmlpull.v1.XmlPullParserFactory; 

    import android.support.v7.app.ActionBarActivity; 
    import android.content.res.XmlResourceParser; 
    import android.os.AsyncTask; 
    import android.os.Bundle; 
    import android.util.Log; 
    import android.view.Menu; 
    import android.view.MenuItem; 
    import android.view.View; 
    import android.widget.Button; 
    import android.widget.EditText; 

    public class MainActivity extends ActionBarActivity { 
     public static Button GetDir, Clear; 
     public static EditText StartDes, EndDes; 
     public static String TAG = "GoogleDirectionAPI"; 
     //public static String STARTING_DESTINATION = StartDes.getText().toString(); 
     //public static String ENDING_DESTINATION = EndDes.getText().toString(); 
     //public static final String QUERY_URL = "http://maps.googleapis.com/maps/api/directions/xml?origin=" + STARTING_DESTINATION + "&destination=" + ENDING_DESTINATION + "&sensor=false"; 
     public static final String TEST_URL = "http://maps.googleapis.com/maps/api/directions/xml?origin=07306&destination=07306&sensor=false"; 

     @Override 
     protected void onCreate(Bundle savedInstanceState) { 
      super.onCreate(savedInstanceState); 
      setContentView(R.layout.activity_main); 

     } 

     public void ClearDisplay(View v){ 

     } 

     public void GetDirections(View v){ 
      Log.i(TAG, "Query Server.."); 
      AsyncDownloader downloader = new AsyncDownloader(); 
      downloader.execute(); 
     } 

     @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; 
     } 

     @Override 
     public boolean onOptionsItemSelected(MenuItem item) { 
      // Handle action bar item clicks here. The action bar will 
      // automatically handle clicks on the Home/Up button, so long 
      // as you specify a parent activity in AndroidManifest.xml. 
      int id = item.getItemId(); 
      if (id == R.id.action_settings) { 
       return true; 
      } 
      return super.onOptionsItemSelected(item); 
     } 


     //background downloading for XML data 
     private class AsyncDownloader extends AsyncTask<Object, String, Integer>{ 
      @Override 
      protected Integer doInBackground(Object... arg0){ 
       XmlPullParser receivedData = tryDownloadingXmlData(); 
       int RecordsFound = tryParsingXmlData(receivedData); 

       return RecordsFound; 
      } 
      private XmlPullParser tryDownloadingXmlData() { 
       try{ 
        URL xmlUrl = new URL(TEST_URL); 
        XmlPullParser recieveData = XmlPullParserFactory.newInstance().newPullParser(); 
        recieveData.setInput(xmlUrl.openStream(), null); 
        return recieveData; 
       }catch (XmlPullParserException e){ 
        Log.e(TAG,"XmlPullParserException", e); 
       }catch (IOException e){ 
        Log.e(TAG, "XmlPullParserException", e); 
       } 
       return null; 
      } 
      @Override 
      protected void onProgressUpdate(String... values){ 
       if(values.length == 0){ 
        Log.i(TAG, "No data downloaded"); 
       } 
       if(values.length == 1){ 
        String start_address = values[0]; 
        //String end_address = values[1]; 
        //String html_instructions = values[2]; 

        //log 
        Log.i(TAG, "Start Address: " + start_address); 
        //Log.i(TAG, "Ending Address: "+ end_address); 
        //Log.i(TAG, "html instructions: " + html_instructions); 
       } 
       super.onProgressUpdate(values); 
      } 
      private int tryParsingXmlData(XmlPullParser receivedData) { 
       if(receivedData != null){ 
        return processRecievedData(receivedData); 
        } 

       return 0; 
      } 
      private int processRecievedData(XmlPullParser receivedData) { 
       // TODO Auto-generated method stub 
       int eventType = -1; 
       int recordsFound = 0; 

       //find values in XML records 
       String start_address = ""; 
       //String end_address = ""; 
       //String html_instructions = ""; 

       while(eventType != XmlResourceParser.END_DOCUMENT){ 
        String tagName = receivedData.getName(); 

//problem starts here!! 
        switch(eventType){ 
        case XmlResourceParser.START_TAG: 
         if(tagName.equals("start_address")){ 
          //pull value 
          start_address = receivedData.getText(); // get text contained inside the start_address tag (not working and returns null) 
         } 
         break; 

        case XmlPullParser.END_TAG: 
         if(tagName.equals("start_address")){ 
          recordsFound++; 
          publishProgress(start_address); 

         } 
         break; 
        } 
        try { 
         eventType = receivedData.next(); 
        } catch (XmlPullParserException e) { 
         // TODO Auto-generated catch block 
         e.printStackTrace(); 
        } catch (IOException e) { 
         // TODO Auto-generated catch block 
         e.printStackTrace(); 
        } 
       } 

       //if no data is found, publish empty event 
       if(recordsFound == 0){ 
        publishProgress(); 
       } 
       Log.i(TAG, "Processed: "+ recordsFound + " Records"); 
       return recordsFound; 

      } 

     } 
    } 

Answer 1

는

 switch(eventType){ 
     case XmlPullParser.START_TAG: 
      if(tagName.equals("start_address")){ 
        try { 
         start_address = receivedData.nextText().trim(); 
        } catch (XmlPullParserException e) { 
         // TODO Auto-generated catch block 
         e.printStackTrace(); 
        } catch (IOException e) { 
         // TODO Auto-generated catch block 
         e.printStackTrace(); 
        } 
        recordsFound++; 
        publishProgress(start_address); 
      }