Develop Reference

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.

Android:parsing XML returns no value

I created an app that is going to download an xml file,then parse it, and adapt it to a list view, but I faced a problem in parsing xml, first thing first:
MainActivity.java
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
downloadData downloadData = new downloadData();
downloadData.execute("http://ax.itunes.apple.com/WebObjects/MZStoreServices.woa/ws/RSS/topfreeapplications/limit=10/xml");
}
private class downloadData extends AsyncTask<String, Void, String> {
#Override
protected void onPostExecute(String s) {
super.onPostExecute(s);
ParseApplications parseApplications = new ParseApplications();
parseApplications.parse(s);
}
#Override
protected String doInBackground(String... params) {
String rssFeed = downloadXML(params[0]);
if (rssFeed == null) {
}
return rssFeed;
}
private String downloadXML(String urlPath) {
StringBuilder xmlResult = new StringBuilder();
try {
URL url = new URL(urlPath);
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
int charsRead;
char[] inputBuffer = new char[500];
while (true) {
charsRead = reader.read(inputBuffer);
if (charsRead < 0) {
break;
}
if (charsRead > 0) {
xmlResult.append(String.copyValueOf(inputBuffer), 0, charsRead);
}
}
reader.close();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (SecurityException e) {
e.printStackTrace();
}
return xmlResult.toString();
}
}
}
MainActivity.class work well in term of downloading XML, but when it comes to parsing xml, although it parses it,but return no value:
ParseApplications.java
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserFactory;
import java.io.StringReader;
import java.util.ArrayList;
public class ParseApplications {
private ArrayList<FeedEntry> applications;
public ParseApplications() {
this.applications = new ArrayList<>();
}
public ArrayList<FeedEntry> getApplications() {
return applications;
}
public boolean parse(String xmlData) {
boolean status = true;
FeedEntry currentRecord = null;
boolean inEntry = false;
String textValue = "";
try {
XmlPullParserFactory factory = XmlPullParserFactory.newInstance();
factory.setNamespaceAware(true);
XmlPullParser xpp = factory.newPullParser();
xpp.setInput(new StringReader(xmlData));
int eventType = xpp.getEventType();
while (eventType != XmlPullParser.END_DOCUMENT) {
String tagName = xpp.getName();
switch (eventType) {
case XmlPullParser.START_TAG:
if ("entry".equalsIgnoreCase(tagName)) {
inEntry = true;
currentRecord = new FeedEntry();
}
break;
case XmlPullParser.TEXT:
textValue = xpp.getText();
break;
case XmlPullParser.END_TAG:
if (inEntry) {
if ("entry".equalsIgnoreCase(tagName)) {
applications.add(currentRecord);
inEntry = false;
} else if ("name".equalsIgnoreCase(tagName)) {
currentRecord.setName(textValue);
} else if ("artist".equalsIgnoreCase(tagName)) {
currentRecord.setArtist(textValue);
} else if ("releaseDate".equalsIgnoreCase(tagName)) {
currentRecord.setReleaseDate(textValue);
} else if ("image".equalsIgnoreCase(tagName)) {
currentRecord.setImageURL(textValue);
} else if ("summary".equalsIgnoreCase(tagName)) {
currentRecord.setSummary(textValue);
}
}
break;
default:
//Nothing to do
eventType = xpp.next();
}
}
} catch (Exception e) {
status = false;
e.printStackTrace();
}
return status;
}
}
here is the other class:
FeedEntry.java
public class FeedEntry {
private String name;
private String artist;
private String releaseDate;
private String summary;
private String imageURL;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getArtist() {
return artist;
}
public void setArtist(String artist) {
this.artist = artist;
}
public String getReleaseDate() {
return releaseDate;
}
public void setReleaseDate(String releaseDate) {
this.releaseDate = releaseDate;
}
public String getSummary() {
return summary;
}
public void setSummary(String summary) {
this.summary = summary;
}
public String getImageURL() {
return imageURL;
}
public void setImageURL(String imageURL) {
this.imageURL = imageURL;
}
#Override
public String toString() {
return "name='" + name + '\n' +
", artist='" + artist + '\n' +
", releaseDate='" + releaseDate + '\n' +
", imageURL='" + imageURL;
}
}

I think I am a quiet bit late but still, it can help other also. So I am posting my answer. Please check the parse method once you are stuck at first tag only.It should be like this
public boolean parse(String xmlData) {
boolean status = true;
FeedEntry currentRecord = null;
boolean inEntry = false;
String textValue = "";
try {
XmlPullParserFactory factory = XmlPullParserFactory.newInstance();
factory.setNamespaceAware(true);
XmlPullParser xpp = factory.newPullParser();
xpp.setInput(new StringReader(xmlData));
int eventType = xpp.getEventType();
while (eventType != XmlPullParser.END_DOCUMENT) {
String tagName = xpp.getName();
switch (eventType) {
case XmlPullParser.START_TAG:
if (tagName.equalsIgnoreCase("entry")) {
inEntry = true;
currentRecord = new FeedEntry();
}
break;
case XmlPullParser.TEXT:
textValue = xpp.getText();
break;
case XmlPullParser.END_TAG:
if (inEntry) {
if (tagName.equalsIgnoreCase("entry")) {
applications.add(currentRecord);
inEntry = false;
} else if (tagName.equalsIgnoreCase("name")) {
currentRecord.setName(textValue);
} else if (tagName.equalsIgnoreCase("artist")) {
currentRecord.setArtist(textValue);
} else if (tagName.equalsIgnoreCase("releaseDate")) {
currentRecord.setReleaseDate(textValue);
} else if (tagName.equalsIgnoreCase("image")) {
currentRecord.setImageURL(textValue);
} else if (tagName.equalsIgnoreCase("summary")) {
currentRecord.setSummary(textValue);
}
}
break;
default:
//Nothing to do
break;
}
eventType = xpp.next(); // this should come after switch case
}
} catch (
Exception e
)
{
status = false;
e.printStackTrace();
}
return status;
}

In the XmlPullParser.END_TAG: case:
Try to remove "inEntry = false;"

Rss Reader Android not working

I want to make a simple Rss Reader app and it doesn't working. More exactly, it doesn't show nothing, almost nothing. For example, for this feed http://feeds.feedburner.com/telefoane-mobilissimo, I get "https://www.mobilissimo.ro/telefoane/" and "Telefoane mobile: specificații, galerii foto, video, benchmark-uri, teste".
Here is the code:
public List<FeedModel> parseFeed(InputStream inputStream) throws XmlPullParserException,
IOException {
String title = null;
String description = null;
String link=null;
String content=null;
String pubDate=null;
Bitmap bitmap=null;
URL url;
boolean isItem = false;
List<FeedModel> items = new ArrayList<>();
try {
XmlPullParser xmlPullParser = Xml.newPullParser();
xmlPullParser.setFeature(XmlPullParser.FEATURE_PROCESS_NAMESPACES, false);
xmlPullParser.setInput(inputStream, null);
xmlPullParser.nextTag();
while (xmlPullParser.next() != XmlPullParser.END_DOCUMENT) {
int eventType = xmlPullParser.getEventType();
String name = xmlPullParser.getName();
if(name == null)
continue;
if(eventType == XmlPullParser.END_TAG) {
if(name.equalsIgnoreCase("item")) {
isItem = false;
}
continue;
}
if (eventType == XmlPullParser.START_TAG) {
if(name.equalsIgnoreCase("item")) {
isItem = true;
continue;
}
}
String result = "";
if (xmlPullParser.next() == XmlPullParser.TEXT) {
result = xmlPullParser.getText();
xmlPullParser.nextTag();
}
System.out.println(result);
System.out.println(isItem);
if (name.equalsIgnoreCase("title")) {
title = result;
} else if (name.equalsIgnoreCase("description")) {
description = result.substring(result.indexOf("<img"));
}
else if (name.equalsIgnoreCase("pubDate"))
pubDate=result;
else if (name.equalsIgnoreCase("link"))
link = result;
else if (name.equalsIgnoreCase("content:encoded"))
content=result.substring(result.indexOf("<div"),result.indexOf("]]")-1);
if (description!=null&&description.startsWith("<img"))
{
System.out.println(description.substring(10,74));
url=new URL(description.substring(10,74));
description=description.substring(description.indexOf("/>")+2);
bitmap = BitmapFactory.decodeStream(url.openConnection().getInputStream());
}
if (title != null && description != null && bitmap!=null && link!=null) {
if(isItem) {
FeedModel item = new FeedModel(title, description, pubDate, content, bitmap, feed, link);
items.add(item);
}
title = null;
description = null;
pubDate=null;
link=null;
content=null;
bitmap=null;
isItem = false;
}
}
return items;
} finally {
inputStream.close();
}
}
public class FeedTask extends AsyncTask<Void,Void,Void>{
private String feedTask;
public FeedTask(String feed)
{
this.feedTask=feed;
}
#Override
protected void onPreExecute() {
if (anInt==1)
{
MainActivity.this.anInt=0;
centerError.animate().alpha(0f).setDuration(getResources().getInteger(android.R.integer.config_mediumAnimTime)).setListener(new AnimatorListenerAdapter() {
#Override
public void onAnimationEnd(Animator animation) {
centerError.setVisibility(View.GONE);
super.onAnimationStart(animation);
}
});
}
swipeRefreshLayout.setRefreshing(true);
recyclerView.animate().alpha(0f).setDuration(getResources().getInteger(android.R.integer.config_mediumAnimTime));
super.onPreExecute();
}
#Override
protected Void doInBackground(Void... params) {
try {
URL url = new URL(feedTask);
InputStream inputStream = url.openConnection().getInputStream();
feedModelList = parseFeed(inputStream);
}
catch (Exception e){}
return null;
}
#Override
protected void onPostExecute(Void aVoid) {
if (feedModelList!=null) {
recyclerView.setAdapter(new FeedAdapter(feedModelList, MainActivity.this));
recyclerView.animate().alpha(1f).setDuration(getResources().getInteger(android.R.integer.config_mediumAnimTime));
}
else System.out.println("heeey");
swipeRefreshLayout.setRefreshing(false);
super.onPostExecute(aVoid);
}
}

read rss feed - android

I'm trying to develop a simple application that reads rss feeds from a certain URL and then displays the results in a list view.
Here is my rss reader, which is the main thing in the app:
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.ArrayList;
import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserFactory;
public class RssReader {
private String title = null;
private String link = null;
private String description = null;
private ArrayList<RssItem> posts = new ArrayList<RssItem>();
private Thread thread;
private String urlString = null;
private XmlPullParserFactory xmlFactoryObject;
public volatile boolean parsingComplete = true;
public RssReader(String url) {
this.urlString = url;
}
public boolean getParsingComplete() {
return this.parsingComplete;
}
public ArrayList<RssItem> getPosts() {
return posts;
}
public void parseXML(XmlPullParser parser) {
int event;
try {
event = parser.getEventType();
while (event != XmlPullParser.END_DOCUMENT) {
String name = parser.getName();
switch (event) {
case XmlPullParser.START_TAG:
break;
case XmlPullParser.END_TAG:
if (name.equals("title")) {
title = parser.getText();
} else if (name.equals("link")) {
link = parser.getText();
} else if (name.equals("description")) {
description = parser.getText();
}
break;
}
if(title != null && link != null && description != null) {
RssItem item = new RssItem(this.title,this.description,this.link);
posts.add(item);
this.title = this.description = this.link = null;
}
event = parser.next();
}
parsingComplete = false;
} catch (Exception e) {
e.printStackTrace();
}
}
public void fetchXML() {
thread = new Thread(new Runnable() {
#Override
public void run() {
try {
URL url = new URL(urlString);
HttpURLConnection conn = (HttpURLConnection) url
.openConnection();
conn.setReadTimeout(10000 /* milliseconds */);
conn.setConnectTimeout(15000 /* milliseconds */);
conn.setRequestMethod("GET");
conn.setDoInput(true);
// Starts the query
conn.connect();
InputStream stream = conn.getInputStream();
xmlFactoryObject = XmlPullParserFactory.newInstance();
XmlPullParser myparser = xmlFactoryObject.newPullParser();
myparser.setFeature(
XmlPullParser.FEATURE_PROCESS_NAMESPACES, false);
myparser.setInput(stream, null);
parseXML(myparser);
stream.close();
} catch (Exception e) {
} finally {
parsingComplete = true;
}
}
});
thread.start();
}
And here is my MainActivity:
package com.example.ynetrssproject;
import java.util.ArrayList;
import android.support.v7.app.ActionBarActivity;
import android.util.Log;
import android.widget.ListView;
import android.os.Bundle;
public class MainActivity extends ActionBarActivity {
private ListView news;
private String rssUrl = "http://www.themarker.com/cmlink/1.144";
private ArrayList<RssItem> list;
private RssItemAdapter adapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
news = (ListView) findViewById(R.id.news);
RssReader reader = new RssReader(rssUrl);
reader.fetchXML();
while(true) {
Log.d("Runnning", "Run");
if(reader.getParsingComplete()) {
list = reader.getPosts();
break;
}
}
adapter = new RssItemAdapter(this, R.layout.post_item_list, list);
news.setAdapter(adapter);
}
}
The problem is that everytime I call fetchXML, eventually it returns me an empty ArrayList. Therefore, my listview keeps being empty.
My adapter isn't such a big deal. It works fine. The problem is that I keep getting an empty array list from the object RssReader. I know this because I performed a little if statement at the end of the code just to check if the ArrayList is empty.
P.S I have tried with multiple RSS urls but none of them works.
Also, I added the permission of Internet in my manifest.

use SAXParser
public class RssParseHandler extends DefaultHandler {
private List<RssItem> rssItems;
private RssItem currentItem;
private boolean parsingTitle;
private boolean parsingLink;
public RssParseHandler() {
rssItems = new ArrayList<RssItem>();
}
public List<RssItem> getItems() {
return rssItems;
}
#Override
public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {
if ("item".equals(qName)) {
currentItem = new RssItem();
} else if ("title".equals(qName)) {
parsingTitle = true;
} else if ("link".equals(qName)) {
parsingLink = true;
}
}
#Override
public void endElement(String uri, String localName, String qName)
throws SAXException {
if ("item".equals(qName)) {
rssItems.add(currentItem);
currentItem = null;
}else if ("title".equals(qName)) {
parsingTitle = false;
}else if ("link".equals(qName)) {
parsingLink = false;
}
}
#Override
public void characters(char[] ch, int start, int length)
throws SAXException {
if (parsingTitle) {
if (currentItem != null)
currentItem.setTitle(new String(ch, start, length));
}else if (parsingLink) {
if (currentItem != null) {
currentItem.setLink(new String(ch, start, length));
parsingLink = false;
}
}
}
}
public class RssItem {
// item title
private String title;
// item link
private String link;
private String id;
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 getLink() {
return link;
}
public void setLink(String link) {
this.link = link;
}
#Override
public String toString() {
return title;
}
}

Android 3.0 Honeycomb problem in parsing RSS feed

I am trying to parse rss feed in honeycomb 3.0 but it gives error as follows.
ERROR/AndroidNews::PullFeedParser(444): android.os.NetworkOnMainThreadException
I tried same code in android lower version it works but it doesn't work in Honeycomb.
Please suggest some help
This is in main activity
try{
FeedParser parser = new XmlPullFeedParser(feedUrl);
messages = parser.parse();
titles = new ArrayList<String>(messages.size());
String description ="";//= new ArrayList<String>(messages.size());
for (Message msg : messages){
description = msg.getDescription().toString();
Log.v("Desc", description);
titles.add(description);
}
} catch (Throwable t){
Log.e("AndroidNews",t.getMessage(),t);
}
I am using XmlPullFeedParser which extends BaseFeedParser
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("AndroidNews::PullFeedParser", e.getMessage(), e);
throw new RuntimeException(e);
}
return messages;
}
}
This is BaseFeedParser:
public class BaseFeedParser implements FeedParser {
// names of the XML tags
static final String CHANNEL = "channel";
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";
static final String BODY = "body";
private 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 List<Message> parse() {
// TODO Auto-generated method stub
return null;
}
}
This is FeedParser:
public interface FeedParser {
List<Message> parse();
}
This is message class:
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;
private String body;
public String getTitle() {
return title;
}
public String getBody() {
return body;
}
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;
copy.body = body;
return copy;
}
#Override
public String toString() {
StringBuilder sb = new StringBuilder();
sb.append("Title: ");
sb.append(title);
sb.append("Body: ");
sb.append(body);
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;
} else if (!body.equals(other.body))
return false;
return true;
}
public int compareTo(Message another) {
if (another == null) return 1;
// sort descending, most recent first
return another.date.compareTo(date);
}
}

The error message here pretty much tells you what is going on -- you are trying to access the network on tthe main thread. You really shouldn't do that on any version of android, because it can (read: will) cause your UI to hang while the connection is processing.
There are ways to turn the error off, but I won't get into tthem: you shouodnt do it.
instead, you want to do this work in aa background thread and post a minimal handler back to the UI thread. I don't have an example handy (on my tablet now) but let me know if you cannot find one.
..edit..
OK, here's a simple example. This requires an activity with a text view (id "text") and, of course, INTERNET permissions. Let me know if you have any questions!
public class MainActivity extends Activity {
private TextView mTextView;
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
mTextView = (TextView) findViewById(R.id.text);
// start our call in a new thread
(new Thread(new Runnable() {
#Override
public void run() {
fetchPage();
}
})).start();
}
private void fetchPage() {
try {
URL url = new URL("http://stackoverflow.com/feeds");
HttpURLConnection c = (HttpURLConnection) url.openConnection();
c.setRequestMethod("GET");
c.setDoOutput(true);
c.connect();
ByteArrayOutputStream bos = new ByteArrayOutputStream();
InputStream is = c.getInputStream();
byte[] buffer = new byte[1024];
int len1 = 0;
while ((len1 = is.read(buffer)) != -1) {
bos.write(buffer, 0, len1);
}
bos.close();
is.close();
// Remember, all UI things must occur back on the UI thread!
final String text = bos.toString();
this.runOnUiThread(new Runnable() {
#Override
public void run() {
mTextView.setText(text);
}
});
} catch (final IOException ioe) {
this.runOnUiThread(new Runnable() {
#Override
public void run() {
Toast.makeText(MainActivity.this, ioe.getMessage(), Toast.LENGTH_LONG).show();
}
});
}
}
thanks,
--randy