Mega Code Archive
Process xml document from a Url
<![CDATA[
package app.test;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.GregorianCalendar;
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.NodeList;
import org.xml.sax.SAXException;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.location.Location;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.View;
import android.view.MenuItem;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.AdapterView.OnItemClickListener;
import java.util.Date;
import java.text.SimpleDateFormat;
import android.location.Location;
class Quake {
private Date date;
private String details;
private Location location;
private double magnitude;
private String link;
public Date getDate() { return date; }
public String getDetails() { return details; }
public Location getLocation() { return location; }
public double getMagnitude() { return magnitude; }
public String getLink() { return link; }
public Quake(Date _d, String _det, Location _loc, double _mag, String _link) {
date = _d;
details = _det;
location = _loc;
magnitude = _mag;
link = _link;
}
@Override
public String toString() {
SimpleDateFormat sdf = new SimpleDateFormat("HH.mm");
return sdf.format(date) + ": " + magnitude + " " + details;
}
}
public class Test extends Activity {
static final private int QUAKE_DIALOG = 1;
static final private int MENU_UPDATE = Menu.FIRST;
ListView earthquakeListView;
ArrayAdapter<Quake> aa;
ArrayList<Quake> earthquakes = new ArrayList<Quake>();
Quake selectedQuake;
@Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
setContentView(R.layout.main);
earthquakeListView = (ListView)this.findViewById(R.id.earthquakeListView);
earthquakeListView.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> _av, View _v, int _index, long _id) {
selectedQuake = earthquakes.get(_index);
showDialog(QUAKE_DIALOG);
}
});
aa = new ArrayAdapter<Quake>(getApplicationContext(), android.R.layout.simple_list_item_1, earthquakes);
earthquakeListView.setAdapter(aa);
refreshEarthquakes();
}
private void refreshEarthquakes() {
URL url;
try {
url = new URL("http://earthquake.usgs.gov/eqcenter/catalogs/1day-M2.5.xml");
URLConnection connection = url.openConnection();
HttpURLConnection httpConnection = (HttpURLConnection)connection;
int responseCode = httpConnection.getResponseCode();
if (responseCode == HttpURLConnection.HTTP_OK) {
InputStream in = httpConnection.getInputStream();
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
DocumentBuilder db = dbf.newDocumentBuilder();
Document dom = db.parse(in);
Element docEle = dom.getDocumentElement();
earthquakes.clear();
NodeList nl = docEle.getElementsByTagName("entry");
if (nl != null && nl.getLength() > 0) {
for (int i = 0 ; i < nl.getLength(); i++) {
Element entry = (Element)nl.item(i);
Element title = (Element)entry.getElementsByTagName("title").item(0);
Element g = (Element)entry.getElementsByTagName("georss:point").item(0);
Element when = (Element)entry.getElementsByTagName("updated").item(0);
Element link = (Element)entry.getElementsByTagName("link").item(0);
String details = title.getFirstChild().getNodeValue();
String hostname = "http://earthquake.usgs.gov";
String linkString = hostname + link.getAttribute("href");
String point = g.getFirstChild().getNodeValue();
String dt = when.getFirstChild().getNodeValue();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd'T'hh:mm:ss'Z'");
Date qdate = new GregorianCalendar(0,0,0).getTime();
try {
qdate = sdf.parse(dt);
} catch (ParseException e) {
e.printStackTrace();
}
String[] location = point.split(" ");
Location l = new Location("dummyGPS");
l.setLatitude(Double.parseDouble(location[0]));
l.setLongitude(Double.parseDouble(location[1]));
String magnitudeString = details.split(" ")[1];
int end = magnitudeString.length()-1;
double magnitude = Double.parseDouble(magnitudeString.substring(0, end));
details = details.split(",")[1].trim();
Quake quake = new Quake(qdate, details, l, magnitude, linkString);
addNewQuake(quake);
}
}
}
} catch (Exception e) {
e.printStackTrace();
}
finally {
}
}
private void addNewQuake(Quake _quake) {
earthquakes.add(_quake);
aa.notifyDataSetChanged();
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
super.onCreateOptionsMenu(menu);
menu.add(0, MENU_UPDATE, Menu.NONE, "update");
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
super.onOptionsItemSelected(item);
switch (item.getItemId()) {
case (MENU_UPDATE): {
refreshEarthquakes();
return true;
}
}
return false;
}
@Override
public Dialog onCreateDialog(int id) {
switch(id) {
case (QUAKE_DIALOG) :
LayoutInflater li = LayoutInflater.from(this);
View quakeDetailsView = li.inflate(R.layout.row, null);
AlertDialog.Builder quakeDialog = new AlertDialog.Builder(this);
quakeDialog.setTitle("Quake Time");
quakeDialog.setView(quakeDetailsView);
return quakeDialog.create();
}
return null;
}
@Override
public void onPrepareDialog(int id, Dialog dialog) {
switch(id) {
case (QUAKE_DIALOG) :
SimpleDateFormat sdf = new SimpleDateFormat("dd/MM/yyyy HH:mm:ss");
String dateString = sdf.format(selectedQuake.getDate());
String quakeText = "Mangitude " + selectedQuake.getMagnitude() + "\n"
+ selectedQuake.getDetails() + "\n" + selectedQuake.getLink();
AlertDialog quakeDialog = (AlertDialog)dialog;
quakeDialog.setTitle(dateString);
TextView tv = (TextView)quakeDialog.findViewById(R.id.quakeDetailsTextView);
if (tv != null)
tv.setText(quakeText);
break;
}
}
}
//main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<ListView
android:id="@+id/earthquakeListView"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
</LinearLayout>
//row.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:padding="10sp">
<TextView
android:id="@+id/quakeDetailsTextView"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:textSize="14sp"
android:autoLink="all"
/>
</LinearLayout>
]]>