Develop Reference

JSONObject Creation throwing Null Pointer Exception

I am in Android Studio, and I am trying to create an Android app that can do some networking. I can get some JSON data, but whenever I convert the String that I get to a JSONObject, a NullPointerException is thrown. Here is my Log error:
Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'int java.lang.String.length()' on a null object reference
at org.json.JSONTokener.nextCleanInternal(JSONTokener.java:116)
at org.json.JSONTokener.nextValue(JSONTokener.java:94)
at org.json.JSONObject.<init>(JSONObject.java:156)
at org.json.JSONObject.<init>(JSONObject.java:173)
at com.daita.getdusa.GetDataTask.doInBackground(GetDataTask.java:58)
at com.daita.getdusa.GetDataTask.doInBackground(GetDataTask.java:21)
at android.os.AsyncTask$2.call(AsyncTask.java:295)
at java.util.concurrent.FutureTask.run(FutureTask.java:237)
at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:234) 
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113) 
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588) 
at java.lang.Thread.run(Thread.java:818) 
The line of code that is causing the exception is this:
JSONObject object = new JSONObject(result);
Edit
I was asked to put more source code, so here it is(The AsyncTask)
public class GetDataTask extends AsyncTask<Void, Void, String> {
TextView submitView;
public GetDataTask(TextView submitView){
this.submitView = submitView;
}
#Override
protected void onPreExecute() {
super.onPreExecute();
submitView.setText("Loading...");
}
#Override
protected void onPostExecute(String s) {
super.onPostExecute(s);
submitView.setText(s);
}
#Override
protected String doInBackground(Void... voids) {
String result;
result = getJSON("http://api.datausa.io/attrs/geo/");
JSONArray data;
List<String> parsedData = null;
List<String> geoID = new ArrayList<>();
try {
JSONObject jsonObject = new JSONObject(result);
data = jsonObject.getJSONArray("data");
parsedData = new ArrayList<>();
Log.i("DUSA", String.valueOf(jsonObject.length()));
for(int i=0; i < data.length(); i++){
parsedData.add(data.getString(i));
}
for(String string: parsedData){
//8, 9
String[] dta = string.split(",");
String populationResult = getJSON("http://api.datausa.io/api/?show=geo&sumlevel=all&required=pop&year=latest&geo="+dta[9].substring(1, dta[9].length()-1));
if (result != null && result != "{\"error\": \"No tables can match the specified query.\"}") {
JSONObject popObject = new JSONObject(populationResult);
JSONArray popData = popObject.getJSONArray("data");
String section = popData.getString(0);
geoID.add(dta[8] + "," + dta[9] + "," + section);
} else{
geoID.add(dta[8] + "," + dta[9] + ", null");
}
}
} catch (JSONException e) {
e.printStackTrace();
}
return geoID.toString();
}
public String getJSON(String url) {
HttpURLConnection c = null;
try {
URL u = new URL(url);
c = (HttpURLConnection) u.openConnection();
c.connect();
int status = c.getResponseCode();
switch (status) {
case 200:
case 201:
BufferedReader br = new BufferedReader(new InputStreamReader(c.getInputStream()));
StringBuilder sb = new StringBuilder();
String line;
while ((line = br.readLine()) != null) {
sb.append(line+"\n");
}
br.close();
return sb.toString();
}
} catch (Exception ex) {
return ex.toString();
} finally {
if (c != null) {
try {
c.disconnect();
} catch (Exception ex) {
}
}
}
return null;
}
}
Note: If you want real time source code updates, look at these files https://www.dropbox.com/sh/5852rt2rakk6iii/AAAgjsqOTsFfP1N4kS1KzuTBa?dl=0

Trying to do it all for you, but let me go step by step to make it simpler for you:
package com.daita.getdusa;
import android.content.Context;
import android.os.AsyncTask;
import android.widget.TextView;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
/**
* Created by User on 8/12/2016.
*/
public class GetDataTask extends AsyncTask<String, Void, Void>{
// Put in Main never here.
String result;
String allValues;
Context context;
public GetDataTask(Context mContext){
this.context = mContext;
}
#Override
protected void onPreExecute() {
super.onPreExecute();
((TextView)((MainActivity)context).findViewById(R.id.resultView)).setText("Loading...");
}
#Override
protected void onPostExecute(Void aVoid) {
super.onPostExecute(aVoid);
((TextView)((MainActivity)context).findViewById(R.id.resultView)).setText(result);
}
#Override
protected Void doInBackground(String... strings) {
HttpURLConnection c = null;
try {
URL u = new URL("http://api.datausa.io/attrs/geo/"); // use urls first value
c = (HttpURLConnection) u.openConnection();
int status = c.getResponseCode();
switch (status) {
case 200:
case 201:
BufferedReader br = new BufferedReader(new InputStreamReader(c.getInputStream()));
StringBuilder sb = new StringBuilder();
String line;
while ((line = br.readLine()) != null) {
sb.append(line + "\n");
}
br.close();
result = sb.toString();
getValue();
}
} catch (Exception ex) {
ex.printStackTrace();
} finally {
if (c != null) {
try {
c.disconnect();
} catch (Exception ex) {
}
}
}
return null;
}
public void getValue() {
// FIX IT
// Parse the JSON properly
}
}
Now learn about json parsing, the data is huge, you need the response in smaller format this huge json, even crashes online json formatter. :)
This code works to show all of the json. Hope this helps.

public class Test {
static String Json="{'root':{['ratedetails':{['levelOne':{["+ "{'FGROUP':'A','rentalpackage':'2D','NOOFDAYS':'2', 'HOURS':'0', 'PERIODPRICE':'100.00',"+ "'CUSTOMERPERDAY':'50.00', 'DRIVERPERDAY':'50.00' ,'KMALLOWANCE':'2', 'EXTKMALLOWPDAY':'60',"+ "'DRIVERKMCHARGE':'5', 'CUSTOMERKMCHARGE':'3', 'MAXIMUMKMCHARGE':'99999999', 'MAXKMCHRGTYPE':'0'"+",'HIDDEN':'2'},"+ "{'FGROUP':'A','rentalpackage':'2D','NOOFDAYS':'2', 'HOURS':'0', 'PERIODPRICE':'100.00',"+ "'CUSTOMERPERDAY':'50.00', 'DRIVERPERDAY':'50.00','KMALLOWANCE':'2', 'EXTKMALLOWPDAY':'60',"+ "'DRIVERKMCHARGE':'5', 'CUSTOMERKMCHARGE':'3', 'MAXIMUMKMCHARGE':'99999999', 'MAXKMCHRGTYPE':'0'"+",'HIDDEN':'2'}"+ "]}"+ "]}"+ "]}}";
public static void main(String[] args) {
//new Test().main();
String s[]=Json.split(",");
for(int i=0;i<s.length;i++)
{
if(true){
System.out.println(s[i].split(":")[s[i].split(":").length-2].substring(s[i].split(":")[s[i].split(":").length-2].indexOf("'")+1, s[i].split(":")[s[i].split(":").length-2].lastIndexOf("'"))+" "+ s[i].split(":")[s[i].split(":").length-1].substring(s[i].split(":")[s[i].split(":").length-1].indexOf("'")+1, s[i].split(":")[s[i].split(":").length-1].lastIndexOf("'")));
}
else{
System.out.println(s[i].split(":")[0].replace("'", "").trim()+" "+s[i].split(":")[1].replace("'", "").trim()); } } // System.out.println(Json.split(",")[5].split(":")[1].replace("'", "")); } }

Get metadata from shoutcast stream

I'm developing a radio app with multiple radios, the stream is playing fine. But I'm struggling to show artist and music playing at the moment.
This is the class I'm using to get metadata from shoutcast stream:
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.net.URLConnection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class IcyStreamMeta<Message> {
protected URL streamUrl;
private Map<String, String> metadata;
private boolean isError;
public IcyStreamMeta(URL streamUrl) {
setStreamUrl(streamUrl);
isError = false;
}
/**
* Get artist using stream's title
*
* #return String
* #throws IOException
*/
public String getArtist() throws IOException {
Map<String, String> data = getMetadata();
if (!data.containsKey("StreamTitle"))
return "";
String streamTitle = data.get("StreamTitle");
String title = streamTitle.substring(0, streamTitle.indexOf("-"));
return title.trim();
}
/**
* Get title using stream's title
*
* #return String
* #throws IOException
*/
public String getTitle() throws IOException {
Map<String, String> data = getMetadata();
if (!data.containsKey("StreamTitle"))
return "";
String streamTitle = data.get("StreamTitle");
String artist = streamTitle.substring(streamTitle.indexOf("-")+1);
return artist.trim();
}
public Map<String, String> getMetadata() throws IOException {
if (metadata == null) {
refreshMeta();
}
return metadata;
}
public void refreshMeta() throws IOException {
retreiveMetadata();
}
private void retreiveMetadata() throws IOException {
URLConnection con = streamUrl.openConnection();
con.setRequestProperty("Icy-MetaData", "1");
con.setRequestProperty("Connection", "close");
con.setRequestProperty("Accept", null);
con.connect();
int metaDataOffset = 0;
Map<String, List<String>> headers = con.getHeaderFields();
InputStream stream = con.getInputStream();
if (headers.containsKey("icy-metaint")) {
// Headers are sent via HTTP
metaDataOffset = Integer.parseInt(headers.get("icy-metaint").get(0));
} else {
// Headers are sent within a stream
StringBuilder strHeaders = new StringBuilder();
char c;
while ((c = (char)stream.read()) != -1) {
strHeaders.append(c);
if (strHeaders.length() > 5 && (strHeaders.substring((strHeaders.length() - 4), strHeaders.length()).equals("\r\n\r\n"))) {
// end of headers
break;
}
}
// Match headers to get metadata offset within a stream
Pattern p = Pattern.compile("\\r\\n(icy-metaint):\\s*(.*)\\r\\n");
Matcher m = p.matcher(strHeaders.toString());
if (m.find()) {
metaDataOffset = Integer.parseInt(m.group(2));
}
}
// In case no data was sent
if (metaDataOffset == 0) {
isError = true;
return;
}
// Read metadata
int b;
int count = 0;
int metaDataLength = 4080; // 4080 is the max length
boolean inData = false;
StringBuilder metaData = new StringBuilder();
// Stream position should be either at the beginning or right after headers
while ((b = stream.read()) != -1) {
count++;
// Length of the metadata
if (count == metaDataOffset + 1) {
metaDataLength = b * 16;
}
if (count > metaDataOffset + 1 && count < (metaDataOffset + metaDataLength)) {
inData = true;
} else {
inData = false;
}
if (inData) {
if (b != 0) {
metaData.append((char)b);
}
}
if (count > (metaDataOffset + metaDataLength)) {
break;
}
}
// Set the data
metadata = IcyStreamMeta.parseMetadata(metaData.toString());
// Close
stream.close();
}
public boolean isError() {
return isError;
}
public URL getStreamUrl() {
return streamUrl;
}
public void setStreamUrl(URL streamUrl) {
this.metadata = null;
this.streamUrl = streamUrl;
this.isError = false;
}
public static Map<String, String> parseMetadata(String metaString) {
Map<String, String> metadata = new HashMap();
String[] metaParts = metaString.split(";");
Pattern p = Pattern.compile("^([a-zA-Z]+)=\\'([^\\']*)\\'$");
Matcher m;
for (int i = 0; i < metaParts.length; i++) {
m = p.matcher(metaParts[i]);
if (m.find()) {
metadata.put(m.group(1), m.group(2));
}
}
return metadata;
}
}
And the method on MainActivity to get the metadata every 10 seconds
private void getMeta()
{
Timer timer = new Timer();
timer.schedule(new TimerTask() {
public void run() {
try {
IcyStreamMeta icy = new IcyStreamMeta(new URL(RadiophonyService.getRadioURL()));
final String data = icy.getArtist() + " - " + icy.getTitle();
final TextView meta = (TextView) findViewById(R.id.now_playing);
runOnUiThread(new Runnable() {
public void run() {
meta.setText(data);
}
});
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}, 0, 10000);
}
Initially, when I select one station, it plays but does not show metadata and when I select another station the app crashes with this runtime error:
E/AndroidRuntime: FATAL EXCEPTION: Timer-0
Process: com.example.app, PID: 23597
java.lang.StringIndexOutOfBoundsException: length=0; regionStart=0; regionLength=-1
at java.lang.String.startEndAndLength(String.java:504)
at java.lang.String.substring(String.java:1333)
at com.example.app.utilities.IcyStreamMeta.getArtist(IcyStreamMeta.java:41)
at com.example.app.activities.MainActivity$8.run(MainActivity.java:306)
at java.util.Timer$TimerImpl.run(Timer.java:284)
I'm stuck at this for days, and I tried other solutions but nothing works!

Looks like this line
String title = streamTitle.substring(0, streamTitle.indexOf("-"));
is the culprit.
If streamTitle does not have a dash in its title, indexOf() will return a -1, and substring() is choking because you can't have an end index less than the start index.
Maybe you need something like this:
int pos = streamTitle.indexOf("-");
String title = (pos == -1) ? streamTitle : streamTitle.substring(0, pos);

xmpp connection blackberry java

Im able to connect with xmpp server and login authentication is done but when im sending roster the inputstream is.read() giving me -1 and thrown an exception i dont know what to do now.please help me out.
My XMppCOnnection class:
package mypackage;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Enumeration;
import java.util.Vector;
import javax.microedition.io.ConnectionNotFoundException
import javax.microedition.io.SecureConnection;
import javax.microedition.io.StreamConnection;
import net.rim.device.api.io.File;
import net.rim.device.api.io.FileInputStream;
import net.rim.device.api.io.FileOutputStream;
public class XMPPConnection extends XMPPThread {
private XmlReader reader;
private XmlWriter writer;
private InputStream is;
private OutputStream os;
FileInputStream fis;
FileOutputStream fos;
File file;
/**
* If you create this object all variables will be saved and the
* method {#link #run()} is started to log in on jabber server and
* listen to parse incomming xml stanzas. Use
* {#link #addListener(XmppListener xl)} to listen to events of this object.
*/
// jid must in the form "username#host"
// to login Google Talk, set port to 5223 (NOT 5222 in their offical guide)
public XMPPConnection(Connection connection) {
super(connection);
this.host = connection.getHost();
this.port = connection.getPort();
this.username = connection.getUsername();
this.password = connection.getPassword();
this.resource = "mobile";
this.myjid = this.username + "#" + this.host;
if (connection.getServer() == null)
this.server = host;
else
this.server = connection.getServer();
this.use_ssl = connection.isSSL();
this.connectionMaskIndex = connection.getNetworkType();
}
/**
* The <code>run</code> method is called when {#link XMPPConnection} object is
* created. It sets up the reader and writer, calls {#link #login()}
* methode and listens on the reader to parse incomming xml stanzas.
*/
public void run() {
try {
this.connect();
} catch (final IOException e) {
e.printStackTrace();
this.connectionFailed(e.getMessage());
return;
} catch (Exception e) {
e.printStackTrace();
this.connectionFailed(e.getMessage());
return;
}
// connected
try {
boolean loginSuccess = this.login();
if (loginSuccess) {
this.parse();
}
} catch (final Exception e) {
// hier entsteht der connection failed bug (Network Down)
java.lang.System.out.println(e);
this.connectionFailed(e.toString());
}
}
protected void connect() throws IOException, Exception {
if (!use_ssl) {
//final StreamConnection connection = (StreamConnection) Connector.open("http://" + this.server + ":" + this.port+this.connectionMask, Connector.READ_WRITE);
ConnectionFactory connectionFactory = new ConnectionFactory("socket://" + this.server + ":" + this.port, this.connectionMaskIndex);
StreamConnection connection = null;
try {
connection = (StreamConnection) connectionFactory.getNextConnection();
} catch (NoMoreTransportsException e) {
throw new Exception("Connection failed. No transport available.");
} catch (ConnectionNotFoundException e) {
throw new Exception("ConnectionNotFoundException:" + e.getMessage());
} catch (IllegalArgumentException e) {
throw new Exception("IllegalArgumentException: " + e.getMessage());
} catch (IOException e) {
throw new Exception("IOException: " + e.getMessage());
}
is = connection.openInputStream();
os = connection.openOutputStream();
this.reader = new XmlReader(is);
this.writer = new XmlWriter(os);
} else {
//final SecureConnection sc = (SecureConnection) Connector.open("ssl://" + this.server + ":" + this.port+this.connectionMask, Connector.READ_WRITE);
ConnectionFactory connectionFactory = new ConnectionFactory("ssl://" + this.server + ":" + this.port, this.connectionMaskIndex);
SecureConnection sc = null;
try {
sc = (SecureConnection) connectionFactory.getNextConnection();
} catch (NoMoreTransportsException e) {
throw new Exception("Connection failed. No transport available.");
} catch (ConnectionNotFoundException e) {
throw new Exception("ConnectionNotFoundException: " + e.getMessage());
} catch (IllegalArgumentException e) {
throw new Exception("IllegalArgumentException: " + e.getMessage());
} catch (IOException e) {
throw new Exception("IOException: " + e.getMessage());
}
if (sc != null) {
//sc.setSocketOption(SocketConnection.DELAY, 1);
//sc.setSocketOption(SocketConnection.LINGER, 0);
is = sc.openInputStream();
os = sc.openOutputStream();
this.reader = new XmlReader(is);
this.writer = new XmlWriter(os);
}
}
}
/**
* Opens the connection with a stream-tag, queries authentication type and
* sends authentication data, which is username, password and resource.
* #return
* #throws Exception
*/
protected boolean login() throws Exception {
String msg = "<stream:stream xmlns='jabber:client' xmlns:stream='http://etherx.jabber.org/streams' to='" + this.host + "' version='1.0'>";
os.write(msg.getBytes());
os.flush();
do {
reader.next();
if (reader.getType() == XmlReader.START_TAG && reader.getName().equals("stream:features")) {
this.packetParser.parseFeatures(reader);
}
} while (!(reader.getType() == XmlReader.END_TAG && reader.getName().equals("stream:features")));
boolean loginSuccess = this.doAuthentication();
msg = "<stream:stream xmlns='jabber:client' xmlns:stream='http://etherx.jabber.org/streams' to='" + this.host + "' version='1.0'>";
os.write(msg.getBytes());
os.flush();
reader.next();
while (true) {
if ((reader.getType() == XmlReader.END_TAG) && reader.getName().equals("stream:features")) {
break;
}
reader.next();
}
if (resource == null) {
msg = "<iq type='set' id='res_binding'><bind xmlns='urn:ietf:params:xml:ns:xmpp-bind'/></iq>";
} else {
msg = "<iq type='set' id='res_binding'><bind xmlns='urn:ietf:params:xml:ns:xmpp-bind'><resource>" + resource + "</resource></bind></iq>";
}
os.write(msg.getBytes());
os.flush();
return loginSuccess;
}
protected void parse() throws IOException {
while (true) {
int nextTag = this.reader.next();
switch (nextTag) {
case XmlReader.START_TAG:
final String tmp = this.reader.getName();
if (tmp.equals("message")) {
this.packetParser.parseMessage(this.reader);
} else if (tmp.equals("presence")) {
this.packetParser.parsePresence(this.reader);
} else if (tmp.equals("iq")) {
this.packetParser.parseIq(this.reader, this.writer);
} else {
this.packetParser.parseIgnore(this.reader);
}
break;
case XmlReader.END_TAG:
this.reader.close();
throw new IOException("Unexpected END_TAG "+this.reader.getName());
default:
this.reader.close();
throw new IOException("Bad XML tag");
}
}
}
protected boolean doAuthentication() throws Exception {
boolean loginSuccess = false;
Vector mechanismList = this.packetParser.getMechanism();
System.out.println(mechanismList.toString());
if (mechanismList.contains("X-GOOGLE-TOKEN")) {
// X-GOOGLE-TOKEN authorization doing. User can disable
// google features using by deselecting corresponding
// checkbox in profile
String resp = this.packetParser.getGoogleToken(this.myjid, this.password);
String msg = "<auth xmlns=\"urn:ietf:params:xml:ns:xmpp-sasl\" mechanism=\"X-GOOGLE-TOKEN\">" + resp + "</auth>";
os.write(msg.getBytes());
//os.flush();
reader.next();
if (reader.getName().equals("success")) {
loginSuccess = true;
while (true) {
if ((reader.getType() == XmlReader.END_TAG) && reader.getName().equals("success")) {
break;
}
reader.next();
}
}
}
if (mechanismList.contains("PLAIN") && loginSuccess == false) {
String msg = "<auth xmlns='urn:ietf:params:xml:ns:xmpp-sasl' mechanism='PLAIN'>";
byte[] auth_msg = (username + "#" + host + "\0" + username + "\0" + password).getBytes();
msg = msg + MD5.toBase64(auth_msg) + "</auth>";
os.write(msg.getBytes());
os.flush();
reader.next();
if (reader.getName().equals("success")) {
loginSuccess = true;
while (true) {
if ((reader.getType() == XmlReader.END_TAG) && reader.getName().equals("success")) {
break;
}
reader.next();
}
}
}
if (loginSuccess == false) {
for (Enumeration e = listeners.elements(); e.hasMoreElements();) {
XmppListener xl = (XmppListener) e.nextElement();
xl.onAuthFailed(reader.getName() + ", failed authentication");
}
return false;
}
return loginSuccess;
}
public void getRosterVCard(String tojid) throws IOException {
this.writer.startTag("iq");
this.writer.attribute("id", "vc2");
this.writer.attribute("to", tojid);
this.writer.attribute("type", "get");
this.writer.startTag("vCard");
this.writer.attribute("xmlns", "vcard-temp");
this.writer.endTag(); // vCard
this.writer.endTag(); // iq
this.writer.flush();
}
/**
* Sends a roster query.
*
* #throws java.io.IOException is thrown if {#link XmlReader} or {#link XmlWriter}
* throw an IOException.
*/
public void getRoster() throws IOException {
this.writer.startTag("iq");
// this.writer.attribute("id", "roster");
this.writer.attribute("type", "get");
this.writer.startTag("query");
this.writer.attribute("xmlns", "jabber:iq:roster");
this.writer.endTag(); // query
this.writer.endTag(); // iq
this.writer.flush();
//<iq id="qxmpp7" from="919700424402#213.204.83.20/QXmpp" type="get"><query xmlns="jabber:iq:roster"/></iq>
}
/**
* Sends a message text to a known jid.
*
* #param to the JID of the recipient
* #param msg the message itself
*/
public void sendMessage(final String to, final String msg, final String id) {
try {
this.writer.startTag("message");
this.writer.attribute("type", "chat");
this.writer.attribute("to", to);
this.writer.startTag("body");
this.writer.text(msg);
this.writer.endTag();
this.writer.endTag();
this.writer.flush();
} catch (final IOException e) {
java.lang.System.out.println(e);
this.connectionFailed();
}
}
/**
* Requesting a subscription.
*
* #param to the jid you want to subscribe
*/
public void subscribe(final String to) {
this.sendPresence(to, "subscribe", null, null, 0);
}
/**
* Remove a subscription.
*
* #param to the jid you want to remove your subscription
*/
public void unsubscribe(final String to) {
this.sendPresence(to, "unsubscribe", null, null, 0);
}
/**
* Approve a subscription request.
*
* #param to the jid that sent you a subscription request
*/
public void subscribed(final String to) {
this.sendPresence(to, "subscribed", null, null, 0);
}
/**
* Refuse/Reject a subscription request.
*
* #param to the jid that sent you a subscription request
*/
public void unsubscribed(final String to) {
this.sendPresence(to, "unsubscribed", null, null, 0);
}
/**
* Sets your Jabber Status.
*
* #param show is one of the following: <code>null</code>, chat, away,
* dnd, xa, invisible
* #param status an extended text describing the actual status
* #param priority the priority number (5 should be default)
*/
public void setStatus(String show, String status, final int priority) {
if (show.equals("")) {
show = null;
}
if (status.equals("")) {
status = null;
}
if (show.equals("invisible")) {
this.sendPresence(null, "invisible", null, null, priority);
} else {
this.sendPresence(null, null, show, status, priority);
}
}
/**
* Sends a presence stanza to a jid. This method can do various task but
* it's private, please use setStatus to set your status or explicit
* subscription methods subscribe, unsubscribe, subscribed and
* unsubscribed to change subscriptions.
*/
public void sendPresence(final String to, final String type, final String show, final String status, final int priority) {
try {
this.writer.startTag("presence");
if (type != null) {
this.writer.attribute("type", type);
}
if (to != null) {
this.writer.attribute("to", to);
}
if (show != null) {
this.writer.startTag("show");
this.writer.text(show);
this.writer.endTag();
}
if (status != null) {
this.writer.startTag("status");
this.writer.text(status);
this.writer.endTag();
}
if (priority != 0) {
this.writer.startTag("priority");
this.writer.text(Integer.toString(priority));
this.writer.endTag();
}
this.writer.endTag(); // presence
this.writer.flush();
} catch (final IOException e) {
java.lang.System.out.println(e);
this.connectionFailed();
}
}
/**
* Closes the stream-tag and the {#link XmlWriter}.
*/
public void logoff() {
try {
this.writer.endTag();
this.writer.flush();
this.writer.close();
} catch (final IOException e) {
java.lang.System.out.println(e);
this.connectionFailed();
}
}
/**
* Save a contact to roster. This means, a message is send to jabber
* server (which hosts your roster) to update the roster.
*
* #param jid the jid of the contact
* #param name the nickname of the contact
* #param group the group of the contact
* #param subscription the subscription of the contact
*/
public void saveContact(final String jid, final String name, final Enumeration group, final String subscription) {
try {
this.writer.startTag("iq");
this.writer.attribute("type", "set");
this.writer.startTag("query");
this.writer.attribute("xmlns", "jabber:iq:roster");
this.writer.startTag("item");
this.writer.attribute("jid", jid);
if (name != null) {
this.writer.attribute("name", name);
}
if (subscription != null) {
this.writer.attribute("subscription", subscription);
}
if (group != null) {
while (group.hasMoreElements()) {
this.writer.startTag("group");
this.writer.text((String) group.nextElement());
this.writer.endTag(); // group
}
}
this.writer.endTag(); // item
this.writer.endTag(); // query
this.writer.endTag(); // iq
this.writer.flush();
} catch (final IOException e) {
java.lang.System.out.println(e);
this.connectionFailed();
}
}
/**
* This method is used to be called on a parser or a connection error.
* It tries to close the XML-Reader and XML-Writer one last time.
*
*/
private void connectionFailed() {
if (this.writer != null)
this.writer.close();
if (this.reader != null)
this.reader.close();
for (Enumeration e = listeners.elements(); e.hasMoreElements();) {
XmppListener xl = (XmppListener) e.nextElement();
xl.onConnFailed("");
}
}
private void connectionFailed(final String msg) {
if (this.writer != null)
this.writer.close();
if (this.reader != null)
this.reader.close();
for (Enumeration e = listeners.elements(); e.hasMoreElements();) {
XmppListener xl = (XmppListener) e.nextElement();
xl.onConnFailed(msg);
}
}
};
xml reader looks like this:
public class XmlReader {
private InputStream is;
public final static int START_DOCUMENT = 0;
public final static int END_DOCUMENT = 1;
public final static int START_TAG = 2;
public final static int END_TAG = 3;
public final static int TEXT = 4;
//private Stack tags;
private boolean inside_tag;
private boolean left_angle;
private String tagName;
private String text;
private final Hashtable attributes = new Hashtable();
private int c;
private int type = START_DOCUMENT;
//public XmlReader(final InputStream in) throws IOException, UnsupportedEncodingException {
public XmlReader(final InputStream in) throws IOException {
//reader = new InputStreamReader(in, "UTF-8");
this.is = in;
//this.tags = new Stack();
this.inside_tag = false;
this.left_angle = false;
}
//http://discussion.forum.nokia.com/forum/showthread.php?t=76814
//by abirr
private int getNextCharacter() throws IOException {
int a = is.read();
int t=a;
if((t|0xC0)==t){
int b = is.read();
if( b == 0xFF ){ // Check if legal
t=-1;
}else if( b < 0x80 ){ // Check for UTF8 compliancy
throw new IOException("Bad UTF-8 Encoding encountered");
}else if((t|0xE0)==t) {
int c = is.read();
if( c == 0xFF ){ // Check if legal
t=-1;
}else if( c < 0x80 ){ // Check for UTF8 compliancy
throw new IOException("Bad UTF-8 Encoding encountered");
}else
t=((a & 0x0F)<<12) | ((b & 0x3F)<<6) | (c & 0x3F);
}else
t=((a & 0x1F)<<6)|(b&0x3F);
}
return a;
}
public void close() {
if (is != null) {
try {
is.close();
is = null;
} catch (IOException e) {
e.printStackTrace();
}
/*try {
reader.close();
} catch (IOException e) {}*/
}
}
public int next() throws IOException {
/* while (!this.ready())
try {
java.lang.Thread.sleep(100);
} catch (InterruptedException e) {}*/
this.c = getNextCharacter();
if (this.c <= ' ') {
while (((this.c = getNextCharacter()) <= ' ') && (this.c != -1)) {
;
}
}
if (this.c == -1) {
this.type = END_DOCUMENT;
return this.type;
}
if (this.left_angle || (this.c == '<')) {
this.inside_tag = true;
// reset all
this.tagName = null;
this.text = null;
this.attributes.clear();
if (this.c == '<') {
this.left_angle = true;
this.c = getNextCharacter();
}
if (this.left_angle && this.c == '/') {
this.left_angle = false;
this.type = END_TAG;
this.c = getNextCharacter();
this.tagName = this.readName('>');
} else if (this.left_angle && ((this.c == '?') || (this.c == '!'))) {// ignore xml heading & // comments
this.left_angle = false;
while ((this.c = getNextCharacter()) != '>') {
;
}
this.next();
} else {
this.left_angle = false;
this.type = START_TAG;
this.tagName = this.readName(' ');
String attribute = "";
String value = "";
while (this.c == ' ') {
/*this.c = getNextCharacter();
attribute = this.readName('=');
int quote = getNextCharacter();//this.c = this.read(); // '''
BTalk.debugConsole.addDebugMsg("quote: " + quote);
this.c = getNextCharacter();
value = this.readText(quote); //change from value = this.readText(''');
this.c = getNextCharacter();
this.attributes.put(attribute, value);
BTalk.debugConsole.addDebugMsg("attributes: " + attributes);*/
this.c = getNextCharacter();
attribute = this.readName('=').trim();
int quote = getNextCharacter();//this.c = this.read(); // '''
if (quote == 32) {
while (quote == 32) {
quote = getNextCharacter();//this.c = this.read(); // '''
}
this.c = getNextCharacter();
value = this.readText(quote); //change from value = this.readText(''');
this.c = getNextCharacter();
this.attributes.put(attribute, value);
} else {
this.c = getNextCharacter();
value = this.readText(quote); //change from value = this.readText(''');
this.c = getNextCharacter();
this.attributes.put(attribute, value);
}
}
if (this.c != '/') {
this.inside_tag = false;
}
}
} else if ((this.c == '>') && this.inside_tag) // last tag ended
{
this.type = END_TAG;
this.inside_tag = false;
} else {
this.tagName = null;
this.attributes.clear();
this.type = TEXT;
this.text = this.readText('<');
// fix the < dismatching problem
this.left_angle = true;
}
return this.type;
}
// NOTICE: this is only for debug use
public void parseHtml() throws IOException {
while (true) {
char c;
c = (char) this.getNextCharacter();
System.out.print(c);
}
}
public int getType() {
return this.type;
}
public String getName() {
return this.tagName;
}
public String getAttribute(final String name) {
return (String) this.attributes.get(name);
}
public Enumeration getAttributes() {
return this.attributes.keys();
}
public String getText() {
return this.text;
}
private String readText(final int end) throws IOException {
final StringBuffer output = new StringBuffer("");
while (this.c != end) {
if (this.c == '&') {
this.c = getNextCharacter();
switch (this.c) {
case 'l':
output.append('<');
break;
case 'g':
output.append('>');
break;
case 'a':
if (getNextCharacter() == 'm') {
output.append('&');
} else {
output.append('\'');
}
break;
case 'q':
output.append('"');
break;
case 'n':
output.append(' ');
break;
default:
output.append('?');
}
while ((this.c = getNextCharacter()) != ';') {
;
}
// NOTICE: Comment out these mystical codes
// } else if (this.c == '\\') {
// // NOTICE: What this means?
// if ((this.c = getNextCharacter()) == '<') {
// output.append('\\');
// break;
// } else {
// output.append((char) this.c);
// }
} else {
output.append((char) this.c);
}
this.c = getNextCharacter();
}
// while((c = read()) != end);
System.out.println(output.toString()+"");
return output.toString();
}
private String readName(final int end) throws IOException {
final StringBuffer output = new StringBuffer("");
do {
output.append((char) this.c);
} while (((this.c = getNextCharacter()) != end) && (this.c != '>') && (this.c != '/'));
return output.toString();
}
};

the problem is with session we need to create session before roster
String msg = "<iq type=\"set\" id=\"session_1\"><session xmlns=\"urn:ietf:params:xml:ns:xmpp-session\"/></iq>";
try {
os.write(msg.getBytes());
os.flush();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
try {
reader.next();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
if (reader.getName().equals("iq")) {
while (true) {
if((reader.getType() == XmlReader.END_TAG) && reader.getName().equals("iq"))
{
session=true;
break;
}
try {
reader.next();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
//
now the problem is solved.thank you

HTTP Post request on BlackBerry

I am trying to send a json string , from my BlackBerry OS < 7.X application to my Server. I am trying to use an HTTP Post request. What i have done so far is :
String httpURL = "http://ip_of_my_server/phpServer/receiver2.php/" + jsonString;
try {
HttpConnection httpConn;
httpConn = (HttpConnection) Connector.open(httpURL + getConnectionString());
httpConn.setRequestMethod(HttpConnection.POST);
httpConn.setRequestProperty("Content-Type", "application/json; charset=utf-8");
DataOutputStream _outStream = new DataOutputStream(httpConn.openDataOutputStream());
byte[] request_body = httpURL.getBytes();
for (int i = 0; i < request_body.length; i++) {
_outStream.writeByte(request_body[i]);
}
DataInputStream _inputStream = new DataInputStream(httpConn.openInputStream());
StringBuffer _responseMessage = new StringBuffer();
int ch;
while ((ch = _inputStream.read()) != -1) {
_responseMessage.append((char) ch);
}
String res = (_responseMessage.toString());
String response = res.trim();
System.out.println("!!!!!!!!!!!!!! Response is: " + response);
httpConn.close();
} catch (Exception e) {
Dialog.alert("Error - " + e.toString());
}
The code works in a way that i dont fully understand. The author of the above code suggested to use as an httpURL the URL of the server + my json string. The final result is that on my server instead of arriving the json string , is arriving a string like that :
http://ip_of_my_server/phpServer/receiver2.php/ + jsonString
I am not familiar with java. I have previously done this for WP7 and iOS and in the httpUrl i put my servers URL and then with a command i was "appending" my json string to the http request and everything worked as expected.
How can i append the json string to the above HttpRequest , instead of adding it to the URL so that in the server arrives the JSON String only?
EDIT (providing the rest of the code that was used)
//used to specify connection type ( wifi - 3g - etc )
public static String getConnectionString() {
String connectionString = null;
// Wifi is the preferred transmission method
if (WLANInfo.getWLANState() == WLANInfo.WLAN_STATE_CONNECTED) {
connectionString = ";interface=wifi";
}
// Is the carrier network the only way to connect?
else if ((CoverageInfo.getCoverageStatus() & CoverageInfo.COVERAGE_DIRECT) == CoverageInfo.COVERAGE_DIRECT) {
String carrierUid = getCarrierBIBSUid();
if (carrierUid == null) {
// Has carrier coverage, but not BIBS. So use the carrier's TCP network
connectionString = ";deviceside=true";
} else {
// otherwise, use the Uid to construct a valid carrier BIBS request
connectionString = ";deviceside=false;connectionUID="+carrierUid + ";ConnectionType=mds-public";
}
}
// Check for an MDS connection instead (BlackBerry Enterprise Server)
else if ((CoverageInfo.getCoverageStatus() & CoverageInfo.COVERAGE_MDS) == CoverageInfo.COVERAGE_MDS) {
connectionString = ";deviceside=false";
}
// If there is no connection available abort to avoid hassling the user unnecessarily
else if (CoverageInfo.getCoverageStatus() == CoverageInfo.COVERAGE_NONE) {
connectionString = "none";
}
// In theory, all bases are covered by now so this shouldn't be reachable.But hey, just in case ...
else {
connectionString = ";deviceside=true";
}
System.out.println("!!!!!!!!!!!!!! Connection type is: " + connectionString);
return connectionString;
}
/**
* Looks through the phone's service book for a carrier provided BIBS
* network
*
* #return The uid used to connect to that network.
*/
private synchronized static String getCarrierBIBSUid() {
ServiceRecord[] records = ServiceBook.getSB().getRecords();
int currentRecord;
for (currentRecord = 0; currentRecord < records.length; currentRecord++) {
if (records[currentRecord].getCid().toLowerCase().equals("ippp")) {
if (records[currentRecord].getName().toLowerCase()
.indexOf("bibs") >= 0) {
return records[currentRecord].getUid();
}
}
}
return null;
}

The the first line should be simply your URL
String httpURL = "http://ip_of_my_server/phpServer/receiver2.php";
And you should only send the json string to the server as request.
instead of byte[] request_body = httpURL.getBytes();
use byte[] request_body = jsonString.getBytes();
Here is the method for OS 5.0 and above
public static HttpConnection getHttpConnection(String url, byte[] postData) {
HttpConnection conn = null;
OutputStream out = null;
try {
conn = (HttpConnection) new ConnectionFactory().getConnection(url).getConnection();
if (conn != null) {
if (postData == null) {
conn.setRequestMethod(HttpConnection.GET);
conn.setRequestProperty("User-Agent", "Profile/MIDP-2.0 Configuration/CLDC-1.0");
} else {
conn.setRequestMethod(HttpConnection.POST);
conn.setRequestProperty("Content-Length", String.valueOf(postData.length));
conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
conn.setRequestProperty("User-Agent", "Profile/MIDP-2.0 Configuration/CLDC-1.0");
out = conn.openOutputStream();
out.write(postData);
out.flush();
}
if (conn.getResponseCode() != 0) {
return conn;
}
}
} catch (Exception e) {
} finally {
try {
out.close();
} catch (Exception e2) {
}
}
//Only if exception occurs, we close the connection.
//Otherwise the caller should close the connection himself.
try {
conn.close();
} catch (Exception e1) {
}
return null;
}
Here is the complete class if you want it to work with OS 4.2 and above. You may need to replace the constant COVERAGE_DIRECT by its value 1, if you want to compile it with < 4.5.
public class ConnectionHelper {
/**
* Returns the working connection type. The connection types can be BIS, BES, TCP, WAP2, TCPIP
*/
public static HttpConnection getHttpConnection(String url, byte[] postData) {
int[] preferredOrder = new int[] { CONNECTION_WIFI, CONNECTION_BIS, CONNECTION_BES, CONNECTION_UNITE, CONNECTION_WAP2, CONNECTION_TCPIP, };
for (int i = 0; i < preferredOrder.length; i++) {
int type = preferredOrder[i];
if (isPresent(type)) {
HttpConnection conn = null;
OutputStream out = null;
try {
conn = (HttpConnection) Connector.open(convertURL(type, url));
if (conn != null) {
if (postData == null) {
conn.setRequestMethod(HttpConnection.GET);
conn.setRequestProperty("User-Agent", "Profile/MIDP-2.0 Configuration/CLDC-1.0");
} else {
conn.setRequestMethod(HttpConnection.POST);
conn.setRequestProperty(HttpProtocolConstants.HEADER_CONTENT_LENGTH, String.valueOf(postData.length));
conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
conn.setRequestProperty("User-Agent", "Profile/MIDP-2.0 Configuration/CLDC-1.0");
out = conn.openOutputStream();
out.write(postData);
out.flush();
}
if (conn.getResponseCode() != 0) {
return conn;
}
}
} catch (Exception e) {
} finally {
try {
out.close();
} catch (Exception e2) {
}
}
}
}
// Only if exception occurs, we close the connection.
// Otherwise the caller should close the connection himself.
try {
conn.close();
} catch (Exception e1) {
}
return null;
}
/** Stores transport ServiceBooks if found. Otherwise, null */
private static ServiceRecord srMDS, srWiFi, srBIS, srWAP2, srUnite;
private static final int CONNECTION_DEFAULT = 0;
private static final int CONNECTION_BIS = 1;
private static final int CONNECTION_BES = 2;
private static final int CONNECTION_TCPIP = 3;
private static final int CONNECTION_WIFI = 4;
private static final int CONNECTION_WAP2 = 5;
private static final int CONNECTION_UNITE = 6;
private static final int CONFIG_TYPE_BES = 1;
private static final String UNITE_NAME = "Unite";
private static void checkTransportAvailability() {
initializeTransportAvailability();
}
/**
* Initializes the ServiceRecord instances for each transport (if available). Otherwise leaves it null. Also determines if sufficient coverage is available for each transport
* and sets coverage* flags.
*/
private static void initializeTransportAvailability() {
ServiceBook sb = ServiceBook.getSB();
ServiceRecord[] records = sb.getRecords();
for (int i = 0; i < records.length; i++) {
ServiceRecord myRecord = records[i];
String cid, uid;
if (myRecord.isValid() && !myRecord.isDisabled()) {
cid = myRecord.getCid().toLowerCase();
uid = myRecord.getUid().toLowerCase();
// BIS
if (cid.indexOf("ippp") != -1 && uid.indexOf("gpmds") != -1) {
srBIS = myRecord;
}
// BES
if (cid.indexOf("ippp") != -1 && uid.indexOf("gpmds") == -1) {
srMDS = myRecord;
}
// WiFi
if (cid.indexOf("wptcp") != -1 && uid.indexOf("wifi") != -1) {
srWiFi = myRecord;
}
// Wap2.0
if (cid.indexOf("wptcp") != -1 && uid.indexOf("wifi") == -1 && uid.indexOf("mms") == -1) {
srWAP2 = myRecord;
}
// Unite
if (getConfigType(myRecord) == CONFIG_TYPE_BES && myRecord.getName().equals(UNITE_NAME)) {
srUnite = myRecord;
}
}
}
}
/**
* Gets the config type of a ServiceRecord using getDataInt below
*
* #param record
* A ServiceRecord
* #return configType of the ServiceRecord
*/
private static int getConfigType(ServiceRecord record) {
return getDataInt(record, 12);
}
/**
* Gets the config type of a ServiceRecord. Passing 12 as type returns the configType.
*
* #param record
* A ServiceRecord
* #param type
* dataType
* #return configType
*/
private static int getDataInt(ServiceRecord record, int type) {
DataBuffer buffer = null;
buffer = getDataBuffer(record, type);
if (buffer != null) {
try {
return ConverterUtilities.readInt(buffer);
} catch (EOFException e) {
return -1;
}
}
return -1;
}
/**
* Utility Method for getDataInt()
*/
private static DataBuffer getDataBuffer(ServiceRecord record, int type) {
byte[] data = record.getApplicationData();
if (data != null) {
DataBuffer buffer = new DataBuffer(data, 0, data.length, true);
try {
buffer.readByte();
} catch (EOFException e1) {
return null;
}
if (ConverterUtilities.findType(buffer, type)) {
return buffer;
}
}
return null;
}
private static String convertURL(int connectionType, String url) {
switch (connectionType) {
case CONNECTION_BES:
url += ";deviceside=false";
break;
case CONNECTION_BIS:
url += ";deviceside=false" + ";ConnectionType=mds-public";
break;
case CONNECTION_TCPIP:
url += ";deviceside=true";
break;
case CONNECTION_WIFI:
url += ";interface=wifi";
break;
case CONNECTION_WAP2:
url += ";deviceside=true;ConnectionUID=" + srWAP2.getUid();
break;
case CONNECTION_UNITE:
url += ";deviceside=false;ConnectionUID=" + srUnite.getUid();
break;
}
return url;
}
private static boolean isPresent(int connectionType) {
checkTransportAvailability();
switch (connectionType) {
case CONNECTION_BIS:
return (srBIS != null && CoverageInfo.isCoverageSufficient(CoverageInfo.COVERAGE_BIS_B));
case CONNECTION_BES:
return (srMDS != null && CoverageInfo.isCoverageSufficient(CoverageInfo.COVERAGE_MDS));
case CONNECTION_WIFI:
return (srWiFi != null && CoverageInfo.isCoverageSufficient(CoverageInfo.COVERAGE_DIRECT, RadioInfo.WAF_WLAN, false));
case CONNECTION_TCPIP:
return (CoverageInfo.isCoverageSufficient(CoverageInfo.COVERAGE_DIRECT));
case CONNECTION_WAP2:
return (srWAP2 != null && CoverageInfo.isCoverageSufficient(CoverageInfo.COVERAGE_DIRECT));
case CONNECTION_UNITE:
return (srUnite != null && CoverageInfo.isCoverageSufficient(CoverageInfo.COVERAGE_MDS));
case CONNECTION_DEFAULT:
return true;
}
return false;
}
}
And finally post your data.
public void sendJson(String jsonString) {
String httpURL = "http://ip_of_my_server/phpServer/receiver2.php";
HttpConnection httpConn = null;
try {
httpConn = getHttpConnection(httpURL, jsonString.getBytes());
if(httpConn.getResponseCode() == 200) {
//If you need the output, then read it. Otherwise comment it.
byte[] data = IOUtilities.streamToBytes(httpConn.openInputStream());
String response = new String(data);
System.out.println("!!!!!!!!!!!!!! Response is: " + response);
}
} catch (Exception e) {
}
finally {
try {
httpConn.close();
} catch (Exception e2) {
}
}
}

Getting metadata from SHOUTcast using IcyStreamMeta

I am writing an app for Android that grabs meta data from SHOUTcast mp3 streams. I am using a pretty nifty class I found online that I slightly modified, but I am still having 2 problems.
1) I have to continuously ping the server to update the metadata using a TimerTask. I am not fond of this approach but it was all I could think of.
2) There is a metric tonne of garbage collection while my app is running. Removing the TimerTask got rid of the garbage collection issue so I am not sure if I am just doing it wrong or if this is normal.
Here is the class I am using:
public class IcyStreamMeta {
protected URL streamUrl;
private Map<String, String> metadata;
private boolean isError;
public IcyStreamMeta(URL streamUrl) {
setStreamUrl(streamUrl);
isError = false;
}
/**
* Get artist using stream's title
*
* #return String
* #throws IOException
*/
public String getArtist() throws IOException {
Map<String, String> data = getMetadata();
if (!data.containsKey("StreamTitle"))
return "";
try {
String streamTitle = data.get("StreamTitle");
String title = streamTitle.substring(0, streamTitle.indexOf("-"));
return title.trim();
}catch (StringIndexOutOfBoundsException e) {
return "";
}
}
/**
* Get title using stream's title
*
* #return String
* #throws IOException
*/
public String getTitle() throws IOException {
Map<String, String> data = getMetadata();
if (!data.containsKey("StreamTitle"))
return "";
try {
String streamTitle = data.get("StreamTitle");
String artist = streamTitle.substring(streamTitle.indexOf("-")+1);
return artist.trim();
} catch (StringIndexOutOfBoundsException e) {
return "";
}
}
public Map<String, String> getMetadata() throws IOException {
if (metadata == null) {
refreshMeta();
}
return metadata;
}
public void refreshMeta() throws IOException {
retreiveMetadata();
}
private void retreiveMetadata() throws IOException {
URLConnection con = streamUrl.openConnection();
con.setRequestProperty("Icy-MetaData", "1");
con.setRequestProperty("Connection", "close");
//con.setRequestProperty("Accept", null);
con.connect();
int metaDataOffset = 0;
Map<String, List<String>> headers = con.getHeaderFields();
InputStream stream = con.getInputStream();
if (headers.containsKey("icy-metaint")) {
// Headers are sent via HTTP
metaDataOffset = Integer.parseInt(headers.get("icy-metaint").get(0));
} else {
// Headers are sent within a stream
StringBuilder strHeaders = new StringBuilder();
char c;
while ((c = (char)stream.read()) != -1) {
strHeaders.append(c);
if (strHeaders.length() > 5 && (strHeaders.substring((strHeaders.length() - 4), strHeaders.length()).equals("\r\n\r\n"))) {
// end of headers
break;
}
}
// Match headers to get metadata offset within a stream
Pattern p = Pattern.compile("\\r\\n(icy-metaint):\\s*(.*)\\r\\n");
Matcher m = p.matcher(strHeaders.toString());
if (m.find()) {
metaDataOffset = Integer.parseInt(m.group(2));
}
}
// In case no data was sent
if (metaDataOffset == 0) {
isError = true;
return;
}
// Read metadata
int b;
int count = 0;
int metaDataLength = 4080; // 4080 is the max length
boolean inData = false;
StringBuilder metaData = new StringBuilder();
// Stream position should be either at the beginning or right after headers
while ((b = stream.read()) != -1) {
count++;
// Length of the metadata
if (count == metaDataOffset + 1) {
metaDataLength = b * 16;
}
if (count > metaDataOffset + 1 && count < (metaDataOffset + metaDataLength)) {
inData = true;
} else {
inData = false;
}
if (inData) {
if (b != 0) {
metaData.append((char)b);
}
}
if (count > (metaDataOffset + metaDataLength)) {
break;
}
}
// Set the data
metadata = IcyStreamMeta.parseMetadata(metaData.toString());
// Close
stream.close();
}
public boolean isError() {
return isError;
}
public URL getStreamUrl() {
return streamUrl;
}
public void setStreamUrl(URL streamUrl) {
this.metadata = null;
this.streamUrl = streamUrl;
this.isError = false;
}
public static Map<String, String> parseMetadata(String metaString) {
Map<String, String> metadata = new HashMap<String, String>();
String[] metaParts = metaString.split(";");
Pattern p = Pattern.compile("^([a-zA-Z]+)=\\'([^\\']*)\\'$");
Matcher m;
for (int i = 0; i < metaParts.length; i++) {
m = p.matcher(metaParts[i]);
if (m.find()) {
metadata.put((String)m.group(1), (String)m.group(2));
}
}
return metadata;
}
}
And here is my timer:
private void getMeta() {
timer.schedule(new TimerTask() {
public void run() {
try {
icy = new IcyStreamMeta(new URL(stationUrl));
runOnUiThread(new Runnable() {
public void run() {
try {
artist.setText(icy.getArtist());
title.setText(icy.getTitle());
} catch (IOException e) {
e.printStackTrace();
} catch (StringIndexOutOfBoundsException e) {
e.printStackTrace();
}
}
});
} catch (MalformedURLException e) {
e.printStackTrace();
}
}
},0,5000);
}
Much appreciation for any assistance!

I've replaced the IcyStreamMeta class in my program and am getting the meta data from the 7.html file that is a part of the SHOUTcast spec. Far less data usage and all that so I feel it is a better option.
I am still using the TimerTask, which is acceptable. There is practically no GC any more and I am happy with using 7.html and a little regex. :)