Question

I want to write a string to a key in an xml file and then recall it later. How would I do this?

For instance, if the user were to enter a string of characters into a EditText view, I want to be able to store it and compare it against something, like a stored string.

Answer 1

In Android, the XmlPullParser is recommended when doing XML. Here’s a very simple example on how to use it.

 import java.io.IOException;
 import java.io.StringReader;

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

 public class SimpleXmlPullApp
 {

     public static void main (String args[])
         throws XmlPullParserException, IOException
     {
         XmlPullParserFactory factory = XmlPullParserFactory.newInstance();
         factory.setNamespaceAware(true);
         XmlPullParser xpp = factory.newPullParser();

         xpp.setInput(new StringReader ("<foo>Hello World!</foo>"));
         int eventType = xpp.getEventType();
         while (eventType != XmlPullParser.END_DOCUMENT) {
          if(eventType == XmlPullParser.START_DOCUMENT) {
              System.out.println("Start document");
          } else if(eventType == XmlPullParser.END_DOCUMENT) {
              System.out.println("End document");
          } else if(eventType == XmlPullParser.START_TAG) {
              System.out.println("Start tag "+xpp.getName());
          } else if(eventType == XmlPullParser.END_TAG) {
              System.out.println("End tag "+xpp.getName());
          } else if(eventType == XmlPullParser.TEXT) {
              System.out.println("Text "+xpp.getText());
          }
          eventType = xpp.next();
         }
     }
 }

Here are some links that might help:

• Several approaches –
  http://www.ibm.com/developerworks/opensource/library/x-android/
• I got this example from here – http://www.vogella.com/articles/AndroidXML/article.html
• Very good, more complete example – http://www.androidhive.info/2011/11/android-xml-parsing-tutorial/