Обработка XML для Android с помощью XmlPullParser

Question

Я следую учебному курсу от Coursera о том, как вытягивать анализ XML из Интернета. Внизу - код. Я читал в Интернете, но у меня возникают проблемы с реализацией PullParser, когда файл .xml находится в папке с ресурсами, а не в Интернете. Вся операция выполняется в AsyncTask. Какие изменения я должен внести в код?

NetworkingAndroidHttpClientXMLActivity.java

package course.examples.networking.androidhttpclientxml; 

import android.app.ListActivity; 
import android.net.http.AndroidHttpClient; 
import android.os.AsyncTask; 
import android.os.Bundle; 
import android.widget.ArrayAdapter; 

import org.apache.http.client.ClientProtocolException; 
import org.apache.http.client.methods.HttpGet; 

import java.io.IOException; 
import java.util.List; 

public class NetworkingAndroidHttpClientXMLActivity extends ListActivity { 

    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 

     new HttpGetTask().execute(); 
    } 

    private class HttpGetTask extends AsyncTask<Void, Void, List<String>> { 

     // Get your own user name at http://www.geonames.org/login 
     private static final String USER_NAME = "aporter"; 

     private static final String URL = "http://api.geonames.org/earthquakes?north=44.1&south=-9.9&east=-22.4&west=55.2&username=" 
       + USER_NAME; 

     AndroidHttpClient mClient = AndroidHttpClient.newInstance(""); 

     @Override 
     protected List<String> doInBackground(Void... params) { 
      HttpGet request = new HttpGet(URL); 
      XMLResponseHandler responseHandler = new XMLResponseHandler(); 
      try { 
       return mClient.execute(request, responseHandler); 
      } catch (ClientProtocolException e) { 
       e.printStackTrace(); 
      } catch (IOException e) { 
       e.printStackTrace(); 
      } 
      return null; 
     } 

     @Override 
     protected void onPostExecute(List<String> result) { 
      if (null != mClient) 
       mClient.close(); 
      setListAdapter(new ArrayAdapter<String>(
        NetworkingAndroidHttpClientXMLActivity.this, 
        R.layout.list_item, result)); 
     } 
    } 
} 

XMLResponseHandler.java

package course.examples.networking.androidhttpclientxml; 

import java.io.IOException; 
import java.io.InputStreamReader; 
import java.util.ArrayList; 
import java.util.List; 

import org.apache.http.HttpResponse; 
import org.apache.http.client.ClientProtocolException; 
import org.apache.http.client.ResponseHandler; 
import org.xmlpull.v1.XmlPullParser; 
import org.xmlpull.v1.XmlPullParserException; 
import org.xmlpull.v1.XmlPullParserFactory; 

class XMLResponseHandler implements ResponseHandler<List<String>> { 

    private static final String MAGNITUDE_TAG = "magnitude"; 
    private static final String LONGITUDE_TAG = "lng"; 
    private static final String LATITUDE_TAG = "lat"; 
    private String mLat, mLng, mMag; 
    private boolean mIsParsingLat, mIsParsingLng, mIsParsingMag; 
    private final List<String> mResults = new ArrayList<String>(); 

    @Override 
    public List<String> handleResponse(HttpResponse response) 
      throws ClientProtocolException, IOException { 
     try { 

      // Create the Pull Parser 
      XmlPullParserFactory factory = XmlPullParserFactory.newInstance(); 
      XmlPullParser xpp = factory.newPullParser(); 

      // Set the Parser's input to be the XML document in the HTTP Response 
      xpp.setInput(new InputStreamReader(response.getEntity() 
        .getContent())); 

      // Get the first Parser event and start iterating over the XML document 
      int eventType = xpp.getEventType(); 

      while (eventType != XmlPullParser.END_DOCUMENT) { 

       if (eventType == XmlPullParser.START_TAG) { 
        startTag(xpp.getName()); 
       } else if (eventType == XmlPullParser.END_TAG) { 
        endTag(xpp.getName()); 
       } else if (eventType == XmlPullParser.TEXT) { 
        text(xpp.getText()); 
       } 
       eventType = xpp.next(); 
      } 
      return mResults; 
     } catch (XmlPullParserException e) { 
     } 
     return null; 
    } 

    public void startTag(String localName) { 
     if (localName.equals(LATITUDE_TAG)) { 
      mIsParsingLat = true; 
     } else if (localName.equals(LONGITUDE_TAG)) { 
      mIsParsingLng = true; 
     } else if (localName.equals(MAGNITUDE_TAG)) { 
      mIsParsingMag = true; 
     } 
    } 

    public void text(String text) { 
     if (mIsParsingLat) { 
      mLat = text.trim(); 
     } else if (mIsParsingLng) { 
      mLng = text.trim(); 
     } else if (mIsParsingMag) { 
      mMag = text.trim(); 
     } 
    } 

    public void endTag(String localName) { 
     if (localName.equals(LATITUDE_TAG)) { 
      mIsParsingLat = false; 
     } else if (localName.equals(LONGITUDE_TAG)) { 
      mIsParsingLng = false; 
     } else if (localName.equals(MAGNITUDE_TAG)) { 
      mIsParsingMag = false; 
     } else if (localName.equals("earthquake")) { 
      mResults.add(MAGNITUDE_TAG + ":" + mMag + "," + LATITUDE_TAG + ":" 
        + mLat + "," + LONGITUDE_TAG + ":" + mLng); 
      mLat = null; 
      mLng = null; 
      mMag = null; 
     } 
    } 
} 

Answer 1

Вам нужен контекст (например, на операцию), то вы можете сделать это:

InputStream is = context.getAssets().open("filename"); 
XmlPullParserFactory factory = XmlPullParserFactory.newInstance(); 
XmlPullParser xpp = factory.newPullParser(); 
xpp.setInput(is); 

Остальная должны быть одинаковыми.