newsreader.java

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import java.io.*;
import java.util.Vector;

import org.kxml2.io.*;
import org.xmlpull.v1.*;

import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
import javax.microedition.io.*;

public class Newsreader extends MIDlet implements CommandListener {

	static final String URL = "http://www.newsforge.com/newsforge.xml";
	static final String TITLE = "NewsForge";

	Vector descriptions = new Vector();
	List newsList = new List(TITLE, Choice.IMPLICIT);
	TextBox textBox = new TextBox("", "", 256, TextField.ANY);
	Display display;

	Command backCmd = new Command("Back", Command.BACK, 0);

	class ReadThread extends Thread {

		public void run() {
			try {
				HttpConnection httpConnection = (HttpConnection) Connector.open(URL);

				KXmlParser parser = new KXmlParser();

				parser.setInput(new InputStreamReader(httpConnection.openInputStream()));

				//		parser.relaxed = true;

				parser.nextTag();
				parser.require(XmlPullParser.START_TAG, null, "backslash");

				while (parser.nextTag () != XmlPullParser.END_TAG)
					readStory(parser);

				parser.require(XmlPullParser.END_TAG, null, "backslash");
				parser.next();

				parser.require(XmlPullParser.END_DOCUMENT, null, null);
			} catch (Exception e) {
				e.printStackTrace();
				descriptions.addElement(e.toString());
				newsList.append("Error", null);
			}
		}

		/** Read a story and append it to the list */

		void readStory(KXmlParser parser)
			throws IOException, XmlPullParserException {

			parser.require(XmlPullParser.START_TAG, null, "story");

			String title = null;
			String description = null;

			while (parser.nextTag() != XmlPullParser.END_TAG) {

				parser.require(XmlPullParser.START_TAG, null, null);
				String name = parser.getName();

				String text = parser.nextText();

				System.out.println ("<"+name+">"+text);

				if (name.equals("title"))
					title = text;
				else if (name.equals("description"))
					description = text;

				parser.require(XmlPullParser.END_TAG, null, name);
			}
			parser.require(XmlPullParser.END_TAG, null, "story");

			if (title != null) {
				descriptions.addElement(""+description);
				newsList.append(title, null);
			}
		}
	}

	public void startApp() {
		display = Display.getDisplay(this);
		display.setCurrent(newsList);
		newsList.setCommandListener(this);
		textBox.setCommandListener(this);
		textBox.addCommand(backCmd);
		new ReadThread().start();
	}

	public void pauseApp() {
	}

	public void commandAction(Command c, Displayable d) {

		if (c == List.SELECT_COMMAND) {

			String text = (String) descriptions.elementAt(newsList.getSelectedIndex());

			if (textBox.getMaxSize() < text.length())
				textBox.setMaxSize(text.length());

			textBox.setString(text);
			display.setCurrent(textBox);
		} else if (c == backCmd)
			display.setCurrent(newsList);
	}

	public void destroyApp(boolean really) {
	}
/*
	public static void main(String[] argv) {
		org.me4se.MIDletRunner.main (new String [] {"Newsreader"});
	}
*/
}