Feed reader working on emulator but not on phone

Feed reader working on emulator but not on phone - android

Ok I got the code for a feed parser from the ibm website. It works perfectly on the emulator,however on the phone it just stops at one point.
The code is:
package org.developerworks.android;
import java.util.List;
public interface FeedParser {
List<Message> parse();
}
public abstract class BaseFeedParser implements FeedParser {
// names of the XML tags
static final String PUB_DATE = "pubDate";
static final String DESCRIPTION = "description";
static final String LINK = "link";
static final String TITLE = "title";
static final String ITEM = "item";
final URL feedUrl;
protected BaseFeedParser(String feedUrl){
try {
this.feedUrl = new URL(feedUrl);
} catch (MalformedURLException e) {
throw new RuntimeException(e);
}
}
protected InputStream getInputStream() {
try {
return feedUrl.openConnection().getInputStream();
} catch (IOException e) {
throw new RuntimeException(e);
}
}
}
public class SaxFeedParser extends BaseFeedParser {
protected SaxFeedParser(String feedUrl){
super(feedUrl);
}
public List<Message> parse() {
SAXParserFactory factory = SAXParserFactory.newInstance();
try {
SAXParser parser = factory.newSAXParser();
RssHandler handler = new RssHandler();
parser.parse(this.getInputStream(), handler);
return handler.getMessages();
} catch (Exception e) {
throw new RuntimeException(e);
}
}
}
import static org.developerworks.android.BaseFeedParser.*;
public class RssHandler extends DefaultHandler{
private List<Message> messages;
private Message currentMessage;
private StringBuilder builder;
public List<Message> getMessages(){
return this.messages;
}
#Override
public void characters(char[] ch, int start, int length)
throws SAXException {
super.characters(ch, start, length);
builder.append(ch, start, length);
}
#Override
public void endElement(String uri, String localName, String name)
throws SAXException {
super.endElement(uri, localName, name);
if (this.currentMessage != null){
if (localName.equalsIgnoreCase(TITLE)){
currentMessage.setTitle(builder.toString());
} else if (localName.equalsIgnoreCase(LINK)){
currentMessage.setLink(builder.toString());
} else if (localName.equalsIgnoreCase(DESCRIPTION)){
currentMessage.setDescription(builder.toString());
} else if (localName.equalsIgnoreCase(PUB_DATE)){
currentMessage.setDate(builder.toString());
} else if (localName.equalsIgnoreCase(ITEM)){
messages.add(currentMessage);
}
builder.setLength(0);
}
}
#Override
public void startDocument() throws SAXException {
super.startDocument();
messages = new ArrayList<Message>();
builder = new StringBuilder();
}
#Override
public void startElement(String uri, String localName, String name,
Attributes attributes) throws SAXException {
super.startElement(uri, localName, name, attributes);
if (localName.equalsIgnoreCase(ITEM)){
this.currentMessage = new Message();
}
}
}
public class AndroidSaxFeedParser extends BaseFeedParser {
public AndroidSaxFeedParser(String feedUrl) {
super(feedUrl);
}
public List<Message> parse() {
final Message currentMessage = new Message();
RootElement root = new RootElement("rss");
final List<Message> messages = new ArrayList<Message>();
Element channel = root.getChild("channel");
Element item = channel.getChild(ITEM);
item.setEndElementListener(new EndElementListener(){
public void end() {
messages.add(currentMessage.copy());
}
});
item.getChild(TITLE).setEndTextElementListener(new EndTextElementListener(){
public void end(String body) {
currentMessage.setTitle(body);
}
});
item.getChild(LINK).setEndTextElementListener(new EndTextElementListener(){
public void end(String body) {
currentMessage.setLink(body);
}
});
item.getChild(DESCRIPTION).setEndTextElementListener(new
EndTextElementListener(){
public void end(String body) {
currentMessage.setDescription(body);
}
});
item.getChild(PUB_DATE).setEndTextElementListener(new EndTextElementListener(){
public void end(String body) {
currentMessage.setDate(body);
}
});
try {
Xml.parse(this.getInputStream(), Xml.Encoding.UTF_8,
root.getContentHandler());
} catch (Exception e) {
throw new RuntimeException(e);
}
return messages;
}
}
public class XmlPullFeedParser extends BaseFeedParser {
public XmlPullFeedParser(String feedUrl) {
super(feedUrl);
}
public List<Message> parse() {
List<Message> messages = null;
XmlPullParser parser = Xml.newPullParser();
try {
// auto-detect the encoding from the stream
parser.setInput(this.getInputStream(), null);
int eventType = parser.getEventType();
Message currentMessage = null;
boolean done = false;
while (eventType != XmlPullParser.END_DOCUMENT && !done){
String name = null;
switch (eventType){
case XmlPullParser.START_DOCUMENT:
messages = new ArrayList<Message>();
break;
case XmlPullParser.START_TAG:
name = parser.getName();
if (name.equalsIgnoreCase(ITEM)){
currentMessage = new Message();
} else if (currentMessage != null){
if (name.equalsIgnoreCase(LINK)){
currentMessage.setLink(parser.nextText());
} else if (name.equalsIgnoreCase(DESCRIPTION)){
currentMessage.setDescription(parser.nextText());
} else if (name.equalsIgnoreCase(PUB_DATE)){
currentMessage.setDate(parser.nextText());
} else if (name.equalsIgnoreCase(TITLE)){
currentMessage.setTitle(parser.nextText());
}
}
break;
case XmlPullParser.END_TAG:
name = parser.getName();
if (name.equalsIgnoreCase(ITEM) &&
currentMessage != null){
messages.add(currentMessage);
} else if (name.equalsIgnoreCase(CHANNEL)){
done = true;
}
break;
}
eventType = parser.next();
}
} catch (Exception e) {
throw new RuntimeException(e);
}
return messages;
}
}
private String writeXml(List<Message> messages){
XmlSerializer serializer = Xml.newSerializer();
StringWriter writer = new StringWriter();
try {
serializer.setOutput(writer);
serializer.startDocument("UTF-8", true);
serializer.startTag("", "messages");
serializer.attribute("", "number", String.valueOf(messages.size()));
for (Message msg: messages){
serializer.startTag("", "message");
serializer.attribute("", "date", msg.getDate());
serializer.startTag("", "title");
serializer.text(msg.getTitle());
serializer.endTag("", "title");
serializer.startTag("", "url");
serializer.text(msg.getLink().toExternalForm());
serializer.endTag("", "url");
serializer.startTag("", "body");
serializer.text(msg.getDescription());
serializer.endTag("", "body");
serializer.endTag("", "message");
}
serializer.endTag("", "messages");
serializer.endDocument();
return writer.toString();
} catch (Exception e) {
throw new RuntimeException(e);
}
}
If you don't understand the code,it's fully explained here: http://www.ibm.com/developerworks/opensource/library/x-android/
My problem on the phone starts on the MessageList.java like this:
It first calls: loadFeed(ParserType.ANDROID_SAX);
Then the function:
private void loadFeed(ParserType type){
try{
Log.i("AndroidNews", "ParserType="+type.name());
FeedParser parser = FeedParserFactory.getParser(type);
long start = System.currentTimeMillis();
messages = parser.parse();
long duration = System.currentTimeMillis() - start;
Log.i("AndroidNews", "Parser duration=" + duration);
String xml = writeXml();
Log.i("AndroidNews", xml);
List<String> titles = new ArrayList<String>(messages.size());
for (Message msg : messages){
titles.add(msg.getTitle());
}
ArrayAdapter<String> adapter =
new ArrayAdapter<String>(this, R.layout.row,titles);
this.setListAdapter(adapter);
} catch (Throwable t){
Log.e("AndroidNews",t.getMessage(),t);
}
}
At the messages = parser.parse(); line the code just stops,no error and the screen remains black on my phone.
All the code was designed for android 1.5! My phone and the emulator have android 2.3.3!
KEEP IN MIND THAT: On the emulator the code works! On my phone it stops at the messages = parser.parse(); line.
Can someone give me a solution or something?

Try doing the parsing logic in a async task.

Related

Send ArrayAdapter<rss> into another activity intent

i want to make rss reader app.
i want to get rss first then pass it into another activity use intent.
here is my codes:
mainActivity.java
public class mainActivity extends Activity {
new AsyncTaskParseJson().execute();
}
public class AsyncTaskParseJson extends AsyncTask<String, String, String> {
protected String doInBackground(String... arg0) {
RssParser parser = new RssParser("https://test/feed/");
Bundle extra = new Bundle();
extra.putSerializable("objects", parser);
Intent intent = new Intent(this, b.class);
intent.putExtra("extra", extra);
startActivity(intent);
}
}
RssParser.java
import java.io.IOException;
import java.io.Serializable;
import java.io.StringReader;
import java.net.URL;
import java.util.ArrayList;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;
import org.xml.sax.Attributes;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;
import org.xml.sax.XMLReader;
import org.xml.sax.helpers.DefaultHandler;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;
import org.xmlpull.v1.XmlPullParserFactory;
public class RssParser extends DefaultHandler implements Serializable {
private StringBuilder content;
private boolean inChannel;
private boolean inImage;
private boolean inItem;
private ArrayList<Item> items = new ArrayList<Item>();
private Channel channel = new Channel();
private Item lastItem;
public RssParser(String url) {
try {
SAXParserFactory spf = SAXParserFactory.newInstance();
SAXParser sp = spf.newSAXParser();
XMLReader xr = sp.getXMLReader();
URL sourceUrl = new URL(url);
xr.setContentHandler(this);
xr.parse(new InputSource(sourceUrl.openStream()));
}
catch (ParserConfigurationException e) {
e.printStackTrace();
}
catch (SAXException e) {
e.printStackTrace();
}
catch (IOException e) {
e.printStackTrace();
}
}
public class Item {
public String title;
public String description;
public String link;
public String category;
public String pubDate;
public String guid;
public String imageUrl;
public String creator;
}
public class Channel {
public String title;
public String description;
public String link;
public String lastBuildDate;
public String generator;
public String imageUrl;
public String imageTitle;
public String imageLink;
public String imageWidth;
public String imageHeight;
public String imageDescription;
public String language;
public String copyright;
public String pubDate;
public String category;
public String ttl;
}
#Override
public void startDocument() throws SAXException {
// Log.i("LOG", "StartDocument");
}
#Override
public void endDocument() throws SAXException {
// Log.i("LOG", "EndDocument");
}
#Override
public void startElement(String uri, String localName, String qName, Attributes atts) throws SAXException {
if (localName.equalsIgnoreCase("image")) {
inImage = true;
}
if (localName.equalsIgnoreCase("channel")) {
inChannel = true;
}
if (localName.equalsIgnoreCase("item")) {
lastItem = new Item();
items.add(lastItem);
inItem = true;
}
content = new StringBuilder();
}
#Override
public void endElement(String uri, String localName, String qName) throws SAXException {
if (localName.equalsIgnoreCase("image")) {
inImage = false;
}
if (localName.equalsIgnoreCase("channel")) {
inChannel = false;
}
if (localName.equalsIgnoreCase("item")) {
inItem = false;
}
if (localName.equalsIgnoreCase("title")) {
if (content == null) {
return;
}
if (inItem) {
lastItem.title = content.toString();
} else if (inImage) {
channel.imageTitle = content.toString();
} else if (inChannel) {
channel.title = content.toString();
}
content = null;
}
if (localName.equalsIgnoreCase("dc:creator") || localName.equalsIgnoreCase("creator")) {
if (content == null) {
return;
}
lastItem.creator = content.toString();
content = null;
}
if (localName.equalsIgnoreCase("description")) {
if (content == null) {
return;
}
if (inItem) {
lastItem.description = android.text.Html.fromHtml(content.toString()).toString().substring(1);
lastItem.imageUrl = this.extractImageUrl(content.toString());
} else if (inImage) {
channel.imageDescription = content.toString();
} else if (inChannel) {
channel.description = android.text.Html.fromHtml(content.toString()).toString().substring(1);
}
content = null;
}
if (localName.equalsIgnoreCase("link")) {
if (content == null) {
return;
}
if (inItem) {
lastItem.link = content.toString();
} else if (inImage) {
channel.imageLink = content.toString();
} else if (inChannel) {
channel.link = content.toString();
}
content = null;
}
if (localName.equalsIgnoreCase("category")) {
if (content == null) {
return;
}
if (inItem) {
lastItem.category = content.toString();
} else if (inChannel) {
channel.category = content.toString();
}
content = null;
}
if (localName.equalsIgnoreCase("pubDate")) {
if (content == null) {
return;
}
if (inItem) {
lastItem.pubDate = content.toString();
} else if (inChannel) {
channel.pubDate = content.toString();
}
content = null;
}
if (localName.equalsIgnoreCase("guid")) {
if (content == null) {
return;
}
lastItem.guid = content.toString();
content = null;
}
if (localName.equalsIgnoreCase("url")) {
if (content == null) {
return;
}
channel.imageUrl = content.toString();
content = null;
}
if (localName.equalsIgnoreCase("width")) {
if (content == null) {
return;
}
channel.imageWidth = content.toString();
content = null;
}
if (localName.equalsIgnoreCase("height")) {
if (content == null) {
return;
}
channel.imageHeight = content.toString();
content = null;
}
if (localName.equalsIgnoreCase("language")) {
if (content == null) {
return;
}
channel.language = content.toString();
content = null;
}
if (localName.equalsIgnoreCase("copyright")) {
if (content == null) {
return;
}
channel.copyright = content.toString();
content = null;
}
if (localName.equalsIgnoreCase("ttl")) {
if (content == null) {
return;
}
channel.ttl = content.toString();
content = null;
}
}
private String extractImageUrl(String description) {
XmlPullParserFactory factory = null;
try {
factory = XmlPullParserFactory.newInstance();
}
catch (XmlPullParserException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
XmlPullParser xpp = null;
try {
xpp = factory.newPullParser();
}
catch (XmlPullParserException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
try {
xpp.setInput(new StringReader(description));
}
catch (XmlPullParserException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
int eventType = 0;
try {
eventType = xpp.getEventType();
}
catch (XmlPullParserException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
while (eventType != XmlPullParser.END_DOCUMENT) {
if (eventType == XmlPullParser.START_TAG && "img".equals(xpp.getName())) {
//found an image start tag, extract the attribute 'src' from here...
return xpp.getAttributeValue(null, "src").toString();
}
try {
eventType = xpp.next();
}
catch (XmlPullParserException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
return xpp.getAttributeValue(null, "src").toString();
}
#Override
public void characters(char[] ch, int start, int length) throws SAXException {
if (content == null) {
return;
}
content.append(ch, start, length);
}
public Item getItem(int index) {
return items.get(index);
}
public ArrayList<Item> getItems() {
return items;
}
}
second activity that i want to get RssParser Items:
b.java
Bundle extra = getIntent().getBundleExtra("extra");
RssParser p = (RssParser) extra.getSerializable("objects");
ListView listView = (ListView) findViewById(R.id.content_frame);
listView.setAdapter((ListAdapter) p.getItems());
and i always get errors like:
java.lang.RuntimeException: Parcelable encountered IOException writing serializable object
java.lang.RuntimeException: Parcel: unable to marshal value
Caused by: java.lang.RuntimeException: Parcelable encountered IOException reading a Serializable object
if any suggestion i really Thankful.
Best Regards

In this case, instead of extending from Serializable, extend from Parcelable.
And, when sending, use:
RssParser parser = new RssParser("https://test/feed/");
Bundle extra = new Bundle();
extra.putParcelable("objects", parser);
Reception of it:
RssParser rssParser = getIntent().getExtras().getParcelable("objects");
Works like that, not precisely the best option, but works.
The error mainly said that was found a Serializable when a Parcelable was received. So, I changed it to Parcelable.
EDIT
gradle:
dependencies {
//...
compile 'com.google.code.gson:gson:2.2.4'
}
Send:
Intent intent = new Intent(MainActivity.this, b.class);
intent.putExtra("extra", new Gson().toJson(parser));
startActivity(intent);
Receive:
String toParse = getIntent().getExtras().getString("extra");
RssParser rssParser = new Gson().fromJson(toParse, RssParser.class);
From the edit, i was tested. It works.
EDIT2
If, you need to pass a Array or List:
Type rssListType = new TypeToken<ArrayList<RssParser>>(){}.getType();
List<RssParser> founderList = new Gson().fromJson(myStringToParse, rssListType);
Regards.

Api rest call in android doesn't work

I'm trying to make an api rest call as following:
InputSource is = new InputSource("http://api.eventful.com/rest/events/search?app_key=5mnzXGn4S4WsNxKS&keywords=books&location=paris&date=Future");
is.setEncoding("ISO-8859-1");
ParseurEvent parseur = new ParseurEvent(is);
my event parser:
List<Event> eventList;
InputSource bookXmlFileName;
String tmpValue;
Event eventTmp;
//SimpleDateFormat sdf= new SimpleDateFormat("yy-MM-dd");
//Constructor
public ParseurEvent(InputSource bookXmlFileName) {
this.bookXmlFileName = bookXmlFileName;
eventList = new ArrayList<Event>();
parseDocument();
printDatas();
}
private void parseDocument() {
// parse
SAXParserFactory factory = SAXParserFactory.newInstance();
try {
SAXParser parser = factory.newSAXParser();
parser.parse(bookXmlFileName, this);
} catch (ParserConfigurationException e) {
Log.e("myParserConfigurationException", "ParserConfig error");
} catch (SAXException e) {
Log.e("mySAXException", "SAXException : xml not well formed");
} catch (IOException e) {
Log.e("myIOException", e.getMessage());
}
}
public List<Event> printDatas() {
for (Event event : eventList) {
Log.i("Event", event.getTitle());
}
return eventList;
}
#Override
public void startElement(String s, String s1, String elementName, Attributes attributes) throws SAXException {
if (elementName.equalsIgnoreCase("event")) {
eventTmp = new Event();
eventTmp.setId(attributes.getValue("id"));
}
}
#Override
public void endElement(String s, String s1, String element) throws SAXException {
// if end of book element add to list
if (element.equals("event")) {
eventList.add(eventTmp);
}
if (element.equalsIgnoreCase("title")) {
eventTmp.setTitle(tmpValue);
}
if (element.equalsIgnoreCase("url")) {
eventTmp.setUrl(tmpValue);
}
if (element.equalsIgnoreCase("description")) {
eventTmp.setDescription(tmpValue);
}
if(element.equalsIgnoreCase("start_time")){
eventTmp.setStart_time(tmpValue);
}
}
#Override
public void characters(char[] ac, int i, int j) throws SAXException {
tmpValue = new String(ac, i, j);
}
}
I get this exception:
Couldn't open http://api.eventful.com/rest/events/search?app_key=5mnzXGn4S4WsNxKS&keywords=books&location=paris&date=Future

Any network operation should be done in an AsyncTask. And url.openStream should be helpful in this case.
class ParseTask extends AsyncTask<Void, Void, Void> {
#Override
protected Void doInBackground(Void... n) {
try {
URL url = new URL("http://api.eventful.com/rest/events/search?app_key=5mnzXGn4S4WsNxKS&keywords=books&location=paris&date=Future");
InputStream is = url.openStream();
is.setEncoding("ISO-8859-1");
ParseurEvent parseur = new ParseurEvent(is);
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
}
You can call this task as:
new ParseTask().execute();

How to decode a string from xml in android?

In my xml, i have <ns5:Name>mil & carbon</ns5:Name>
From my java code i am retrieving that value by
public class MasterdataParser extends MasterdataBaseParser {
protected MasterdataParser(InputStream response) {
super(response);
}
public MasterData parse() {
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
factory.setNamespaceAware(true);
MasterData masterData;
try {
DocumentBuilder builder = factory.newDocumentBuilder();
Document dom = builder.parse(this.getInputStream());
Element root = dom.getDocumentElement();
masterData = new MasterData();
NodeList list;
Element element;
NodeList childNodeList;
Node node;
String nodeName;
list = root.getElementsByTagName(PREFIX+CATEGORY);
for (int i=0;i<list.getLength();i++){
element = (Element) list.item(i);
childNodeList = element.getChildNodes();
Category category = new Category();
for (int j = 0; j < childNodeList.getLength(); j++) {
node = childNodeList.item(j);
nodeName = node.getNodeName();
if (nodeName.equalsIgnoreCase(PREFIX+CATEGORY_ID)) {
try{
category.setId(node.getFirstChild().getNodeValue());
} catch (NullPointerException ex) {
category.setId(null);
}
}
if (nodeName.equalsIgnoreCase(PREFIX+CATEGORY_NAME)) {
try{
// System.out.println("Masterdataparser category name html "+Html.fromHtml(node.getFirstChild().getNodeValue())); // Not worked
System.out.println("URL Decoder "+URLDecoder.decode(node.getFirstChild().getNodeValue(), "UTF-8")); // Not worked
category.setName(node.getFirstChild().getNodeValue());
} catch (NullPointerException ex) {
category.setName(null);
}
}
}
public abstract class MasterdataBaseParser implements MasterdataParserInterface {
static final String CATEGORY = "Category";
static final String CATEGORY_ID = "Id";
static final String CATEGORY_NAME = "Name";
final InputStream response;
protected MasterdataBaseParser(InputStream response){
this.response = response;
}
protected InputStream getInputStream() {
return response;
}
}
But it displays only "mil" and it is not taking "&" as "&". But i want to display "mil & carbon". How to do this one? Advance thanks for any help

Here is an example of how i do things with one class parser and several xml stream :
public class RSSHandler extends DefaultHandler {
int RSS_ID;
ContentValues parsedValues = new ContentValues();
private String parsedString = null;
protected DataController _dataController;
private StringBuffer parsedBuffer = new StringBuffer();
public void setRssId(int rssId) {
RSS_ID = rssId;
}
public void setDataController(DataController dataController) {
_dataController = (DataController) dataController;
}
#Override
public void startElement(String namespaceURI, String localName, String qName, Attributes atts) throws SAXException {
}
#Override
public void endElement(String namespaceURI, String localName, String qName) throws SAXException {
parsedString = parsedString.trim();
switch (RSS_ID) {
case (0):
if (localName.equals("Application")) {
_dataController.insertRowInTable(RSS_ID, parsedValues);
}
else {
parsedValues.put(localName, parsedString);
}
break;
case (1):
if (localName.equals("tab")) {
_dataController.insertRowInTable(RSS_ID, parsedValues);
}
else {
parsedValues.put(localName, parsedString);
}
break;
case (2):
if (localName.equals("category")) {
_dataController.insertRowInTable(RSS_ID, parsedValues);
}
else {
parsedValues.put(localName, parsedString);
}
break;
case (3):
if (localName.equals("item")) {
_dataController.insertRowInTable(RSS_ID, parsedValues);
}
else {
parsedValues.put(localName, parsedString);
}
break;
case (4):
if (localName.equals("event")) {
_dataController.insertRowInTable(RSS_ID, parsedValues);
}
else {
parsedValues.put(localName, parsedString);
}
break;
case (5):
if (localName.equals("album")) {
_dataController.insertRowInTable(RSS_ID, parsedValues);
}
else {
parsedValues.put(localName, parsedString);
}
break;
case (6):
if (localName.equals("picture")) {
_dataController.insertRowInTable(RSS_ID, parsedValues);
}
else {
parsedValues.put(localName, parsedString);
}
break;
case (7):
if (localName.equals("location")) {
_dataController.insertRowInTable(RSS_ID, parsedValues);
}
else {
parsedValues.put(localName, parsedString);
}
break;
default:
break;
}
parsedString = "";
parsedBuffer = new StringBuffer();
}
#Override
public void characters(char ch[], int start, int length) {
parsedBuffer.append(ch, start, start + length);
parsedString = parsedBuffer.toString();
}
}
DataController is just a global class to acces methods and attributes.
public void insertRowInTable(int tableId, ContentValues myRow) {
String myTable = _tableNameList.get(tableId);
_dataBaseHelper.createRowInTable(myTable, myRow);
}
public void createRowInTable(String tableName, ContentValues values) {
try {
myDataBase.insert(tableName, null, values);
}
catch (Exception e) {
//catch
}
}

While parsing xml, by default "&" is behaving as "Escape sequence"(In android lower version like 2.2) that's why i can't able to parse that "mil & carbon". So before parsing, i replaced "&" with "ampersand"(In words) under the file and after fetching that node as "mil ampersand carbon" then replacing the "ampersand" with "&"(symbol). And lots of thanks to "Yume" sir

how to parse two lines of text and image in android

I have a feed I'm parsing and wondering how to parse two lines of information and an image. I can successfully parse one line of text but haven't figured out how to pull image from it and second line of text i want. Here is a picture of what i want to accomplish
here is the code for my parser
public class XmlPullFeedParser extends BaseFeedParser {
public XmlPullFeedParser(String feedUrl) {
super(feedUrl);
}
public List<Message> parse() {
List<Message> messages = null;
XmlPullParser parser = Xml.newPullParser();
try {
// auto-detect the encoding from the stream
parser.setInput(this.getInputStream(), null);
int eventType = parser.getEventType();
Message currentMessage = null;
boolean done = false;
while (eventType != XmlPullParser.END_DOCUMENT && !done){
String name = null;
switch (eventType){
case XmlPullParser.START_DOCUMENT:
messages = new ArrayList<Message>();
break;
case XmlPullParser.START_TAG:
name = parser.getName();
if (name.equalsIgnoreCase(ITEM)){
currentMessage = new Message();
} else if (currentMessage != null){
if (name.equalsIgnoreCase(LINK)){
currentMessage.setLink(parser.nextText());
} else if (name.equalsIgnoreCase(DESCRIPTION)){
currentMessage.setDescription(parser.nextText());
} else if (name.equalsIgnoreCase(PUB_DATE)){
currentMessage.setDate(parser.nextText());
} else if (name.equalsIgnoreCase(TITLE)){
currentMessage.setTitle(parser.nextText());
}
}
break;
case XmlPullParser.END_TAG:
name = parser.getName();
if (name.equalsIgnoreCase(ITEM) && currentMessage != null){
messages.add(currentMessage);
} else if (name.equalsIgnoreCase(CHANNEL)){
done = true;
}
break;
}
eventType = parser.next();
}
} catch (Exception e) {
Log.e("Trey's Blog::PullFeedParser", e.getMessage(), e);
throw new RuntimeException(e);
}
return messages;
}
}
my list activity
public class MessageList extends ListActivity {
private List<Message> messages;
#Override
public void onCreate(Bundle icicle) {
super.onCreate(icicle);
setContentView(R.layout.activity_main);
loadFeed(ParserType.XML_PULL);
}
#Override
protected void onListItemClick(ListView l, View v, int position, long id) {
super.onListItemClick(l, v, position, id);
Intent viewMessage = new Intent(Intent.ACTION_VIEW,
Uri.parse(messages.get(position).getLink().toExternalForm()));
this.startActivity(viewMessage);
}
private void loadFeed(ParserType type){
try{
Log.i("Trey's Blog", "ParserType="+type.name());
FeedParser parser = FeedParserFactory.getParser(type);
long start = System.currentTimeMillis();
messages = parser.parse();
long duration = System.currentTimeMillis() - start;
Log.i("Trey's Blog", "Parser duration=" + duration);
String xml = writeXml();
Log.i("Trey's Blog", xml);
List<String> titles = new ArrayList<String>(messages.size());
for (Message msg : messages){
titles.add(msg.getTitle());
}
ArrayAdapter<String> adapter =
new ArrayAdapter<String>(this, R.layout.row,titles);
this.setListAdapter(adapter);
} catch (Throwable t){
Log.e("Trey's Blog",t.getMessage(),t);
}
}
private String writeXml(){
XmlSerializer serializer = Xml.newSerializer();
StringWriter writer = new StringWriter();
try {
serializer.setOutput(writer);
serializer.startDocument("UTF-8", true);
serializer.startTag("", "messages");
serializer.attribute("", "number", String.valueOf(messages.size()));
for (Message msg: messages){
serializer.startTag("", "message");
serializer.attribute("", "date", msg.getDate());
serializer.startTag("", "title");
serializer.text(msg.getTitle());
serializer.endTag("", "title");
serializer.startTag("", "url");
serializer.text(msg.getLink().toExternalForm());
serializer.endTag("", "url");
serializer.startTag("", "body");
serializer.text(msg.getDescription());
serializer.endTag("", "body");
serializer.endTag("", "message");
}
serializer.endTag("", "messages");
serializer.endDocument();
return writer.toString();
} catch (Exception e) {
throw new RuntimeException(e);
}
}
}
my feed parser
public abstract class FeedParserFactory {
static String feedUrl = "http://treymorgan.net/feed";
public static FeedParser getParser(){
return getParser(ParserType.ANDROID_SAX);
}
public static FeedParser getParser(ParserType type){
switch (type){
case SAX:
return new SaxFeedParser(feedUrl);
case DOM:
return new DomFeedParser(feedUrl);
case ANDROID_SAX:
return new AndroidSaxFeedParser(feedUrl);
case XML_PULL:
return new XmlPullFeedParser(feedUrl);
default: return null;
}
}
}
and message activity
public class Message implements Comparable<Message>{
static SimpleDateFormat FORMATTER =
new SimpleDateFormat("EEE, dd MMM yyyy HH:mm:ss Z");
private String title;
private URL link;
private String description;
private Date date;
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title.trim();
}
// getters and setters omitted for brevity
public URL getLink() {
return link;
}
public void setLink(String link) {
try {
this.link = new URL(link);
} catch (MalformedURLException e) {
throw new RuntimeException(e);
}
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description.trim();
}
public String getDate() {
return FORMATTER.format(this.date);
}
public void setDate(String date) {
// pad the date if necessary
while (!date.endsWith("00")){
date += "0";
}
try {
this.date = FORMATTER.parse(date.trim());
} catch (ParseException e) {
throw new RuntimeException(e);
}
}
public Message copy(){
Message copy = new Message();
copy.title = title;
copy.link = link;
copy.description = description;
copy.date = date;
return copy;
}
#Override
public String toString() {
StringBuilder sb = new StringBuilder();
sb.append("Title: ");
sb.append(title);
sb.append('\n');
sb.append("Date: ");
sb.append(this.getDate());
sb.append('\n');
sb.append("Link: ");
sb.append(link);
sb.append('\n');
sb.append("Description: ");
sb.append(description);
return sb.toString();
}
#Override
public int hashCode() {
final int prime = 31;
int result = 1;
result = prime * result + ((date == null) ? 0 : date.hashCode());
result = prime * result
+ ((description == null) ? 0 : description.hashCode());
result = prime * result + ((link == null) ? 0 : link.hashCode());
result = prime * result + ((title == null) ? 0 : title.hashCode());
return result;
}
#Override
public boolean equals(Object obj) {
if (this == obj)
return true;
if (obj == null)
return false;
if (getClass() != obj.getClass())
return false;
Message other = (Message) obj;
if (date == null) {
if (other.date != null)
return false;
} else if (!date.equals(other.date))
return false;
if (description == null) {
if (other.description != null)
return false;
} else if (!description.equals(other.description))
return false;
if (link == null) {
if (other.link != null)
return false;
} else if (!link.equals(other.link))
return false;
if (title == null) {
if (other.title != null)
return false;
} else if (!title.equals(other.title))
return false;
return true;
}
public int compareTo(Message another) {
if (another == null) return 1;
// sort descending, most recent first
return another.date.compareTo(date);
}
}
I have been researching this for a while and havn't found anything that works on this. Any information anyone can give would be greatly appreciated. Pretty new to parsing so trying to learn this as i go. Thanks again.
Found a great Tutorial to help me achive the view i wanted to do and here is the link for it.
http://www.androidhive.info/2012/02/android-custom-listview-with-image-and-text/
Hope this will help someone

You're using the ArrayAdapter this adapts an array of strings and shows one string on each list item.
You'll need to:
create a custom adapter
extend BaseAdapter
pass it a custom layout that represents one list item
pass it your List of Message's
in the getView() method retrieve one Message and set the title description and image
This is your culprit code:
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, R.layout.row, titles);
this.setListAdapter(adapter);

Parse XML on Android

I am trying to use the API for our billing system in an Android Application, but I am having trouble figuring out how to parse the XML that it returns. Here is what my function looks like thus far...
public void ParseData(String xmlData)
{
try
{
// Document Builder
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder db = factory.newDocumentBuilder();
// Input Stream
InputSource inStream = new InputSource();
inStream.setCharacterStream(new StringReader(xmlData));
// Parse Document into a NodeList
Document doc = db.parse(inStream);
NodeList nodes = doc.getElementsByTagName("ticket");
// Loop NodeList and Retrieve Element Data
for(int i = 0; i < nodes.getLength(); i++)
{
Node node = nodes.item(i);
if (node instanceof Element)
{
Element child = (Element)node;
String id = child.getAttribute("id");
}
}
}
catch(SAXException e)
{
}
}
and here is what the XML data looks like that is returned. I need to loop through each and pull each element out, but I cant figure out how to do that with the DOM parser.
<whmcsapi>
<action>gettickets</action>
<result>success</result>
<totalresults>1</totalresults>
<startnumber>0</startnumber>
<numreturned>1</numreturned>
<tickets>
<ticket>
<id>1</id>
<tid>557168</tid>
<deptid>1</deptid>
<userid>1</userid>
<name><![CDATA[Array]]></name>
<email></email>
<cc></cc>
<c>TmDEga5v</c>
<date>2009-08-03 23:14:32</date>
<subject><![CDATA[Test Ticket]]></subject>
<message><![CDATA[This is a test ticket>
----------------------------
IP Address: xxx.xxx.xxx.xxx]]></message>
<status>Open</status>
<priority>Medium</priority>
<admin></admin>
<attachment></attachment>
<lastreply>2009-08-04 12:14:18</lastreply>
<flag>0</flag>
<service></service>
</ticket>
</tickets>
</whmcsapi>

Yes SAX parser is the solution and here is the basic code to get you started:
void parseExampleFunction(){
SAXParserFactory spf = SAXParserFactory.newInstance();
SAXParser sp = spf.newSAXParser();
XMLReader xr = sp.getXMLReader();
File myFile = new File( //the XML file which you need to parse );
myFile.createNewFile();
FileInputStream fOut = new FileInputStream(myFile);
BufferedInputStream bos = new BufferedInputStream( fOut );
/** Create handler to handle XML Tags ( extends DefaultHandler ) */
MessagesXMLHandler myXMLHandler = new MessagesXMLHandler(context);
xr.setContentHandler(myXMLHandler);
xr.parse(new InputSource(bos));
}
// the class where the parsing logic needs to defined.This preferably can be in a different .java file
public class MessagesXMLHandler extends DefaultHandler{
//this function is called automatically when a start tag is encountered
#Override
public void startElement(String uri, String localName, String qName,Attributes attributes) throws SAXException
//variable localName is the name of the tag
//this function is called autiomatically when an end tag is encountered
#Override
public void endElement(String uri, String localName, String qName) throws SAXException {
}
//this function gets called to return the value stored betweeen the closing and opening tags
#Override
public void characters(char[] ch, int start, int length) throws SAXException {
//now variable value has the value stored between the closing and opening tags
String value=new String(ch,start,length);
}
}

for parse xml on android best way is to use SAXParser. i explained it bellow with demo....
first of all create your activity class like as bellw.
public class ActivityForSax extends ListActivity {
private ProgressDialog pDialog;
private ItemXMLHandler myXMLHandler;
private String rssFeed = "https://www.dropbox.com/s/t4o5wo6gdcnhgj8/imagelistview.xml?dl=1";
private TextView textview;
private ListView mListView;
private ArrayList<HashMap<String, String>> menuItems;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.xml_dom);
textview = (TextView)findViewById(R.id.textView1);
doParsing();
mListView = getListView();
}
public void doParsing(){
if (isNetworkAvailable()) {
textview.setText("Loading...Please wait...");
new AsyncData().execute(rssFeed);
} else {
showToast("No Network Connection!!!");
}
}
class AsyncData extends AsyncTask<String, Void, Void> {
#Override
protected void onPreExecute() {
menuItems = new ArrayList<HashMap<String, String>>();
pDialog = new ProgressDialog(ActivityForSax.this);
pDialog.setTitle("Loading....");
pDialog.setMessage("Please wait...");
pDialog.show();
super.onPreExecute();
}
#Override
protected Void doInBackground(String... params) {
try {
SAXParserFactory spf = SAXParserFactory.newInstance();
SAXParser sp = spf.newSAXParser();
XMLReader xr = sp.getXMLReader();
myXMLHandler = new ItemXMLHandler();
xr.setContentHandler(myXMLHandler);
URL _url = new URL(params[0]);
xr.parse(new InputSource(_url.openStream()));
} catch (ParserConfigurationException pce) {
Log.e("SAX XML", "sax parse error", pce);
} catch (SAXException se) {
Log.e("SAX XML", "sax error", se);
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
#Override
protected void onPostExecute(Void result) {
super.onPostExecute(result);
textview.setText("Done!!!");
if (pDialog != null && pDialog.isShowing()) {
pDialog.dismiss();
}
ArrayList<Bean> itemsList = myXMLHandler.getItemsList();
for (int i = 0; i < itemsList.size(); i++) {
Bean objBean = itemsList.get(i);
// creating new HashMap
HashMap<String, String> map = new HashMap<String, String>();
// adding each child node to HashMap key => value
map.put("TITLE :: ", objBean.getTitle());
map.put("DESC :: ", objBean.getDesc());
map.put("PUBDATE :: ", objBean.getPubDate());
// adding HashList to ArrayList
menuItems.add(map);
}
// Adding menuItems to ListView
ListAdapter adapter = new SimpleAdapter(ActivityForSax.this, menuItems,
R.layout.list_item,
new String[] { "TITLE :: ", "DESC :: ", "PUBDATE :: " }, new int[] {
R.id.name, R.id.email, R.id.mobile });
mListView.setAdapter(adapter);
}
}
public void showToast(String msg) {
Toast.makeText(ActivityForSax.this, msg, Toast.LENGTH_LONG).show();
}
public boolean isNetworkAvailable() {
ConnectivityManager connectivity = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
if (connectivity == null) {
return false;
} else {
NetworkInfo[] info = connectivity.getAllNetworkInfo();
if (info != null) {
for (int i = 0; i < info.length; i++) {
if (info[i].getState() == NetworkInfo.State.CONNECTED) {
return true;
}
}
}
}
return false;
}
}
now you need to create default handler class for parsing xml data.
public class ItemXMLHandler extends DefaultHandler {
Boolean currentElement = false;
String currentValue = "";
Bean item = null;
private ArrayList<Bean> itemsList = new ArrayList<Bean>();
public ArrayList<Bean> getItemsList() {
return itemsList;
}
// Called when tag starts
#Override
public void startElement(String uri, String localName, String qName,
Attributes attributes) throws SAXException {
currentElement = true;
currentValue = "";
if (localName.equals("item")) {
item = new Bean();
}
}
// Called when tag closing
#Override
public void endElement(String uri, String localName, String qName)
throws SAXException {
currentElement = false;
if (localName.equals("id")) {
item.setId(currentValue);
} else if (localName.equals("title")) {
item.setTitle(currentValue);
} else if (localName.equals("desc")) {
item.setDesc(currentValue);
} else if (localName.equals("pubDate")) {
item.setPubDate(currentValue);
} else if (localName.equals("link")) {
item.setLink(currentValue);
} else if (localName.equals("item")) {
itemsList.add(item);
}
}
// Called to get tag characters
#Override
public void characters(char[] ch, int start, int length)
throws SAXException {
if (currentElement) {
currentValue = currentValue + new String(ch, start, length);
}
}
}
and finally your Bean class like as...
public class Bean {
private String id;
private String title;
private String desc;
private String pubDate;
private String link;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getTitle() {
return title;
}
public void setTitle(String title) {
this.title = title;
}
public String getDesc() {
return desc;
}
public void setDesc(String desc) {
this.desc = desc;
}
public String getPubDate() {
return pubDate;
}
public void setPubDate(String pubDate) {
this.pubDate = pubDate;
}
public String getLink() {
return link;
}
public void setLink(String link) {
this.link = link;
}
}

Add java-json.jar in library folder
Compile files ('libs/java-json.jar') //add this line into your build
Here is the code to convert xml response to json response:
JSONObject jsonObj = null;
try {
jsonObj = XML.toJSONObject(response.toString());
} catch (JSONException e) {
Log.e("JSON exception", e.getMessage());
e.printStackTrace();
}

Develop Reference

The Android operating system is a mobile operating system that was developed by Google (GOOGL?) to be primarily used for touchscreen devices, cell phones, and tablets.

Feed reader working on emulator but not on phone - android

Try doing the parsing logic in a async task.

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how to parse two lines of text and image in android

Parse XML on Android

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