Android RSS阅读器第一pragraph后切断 [英] Android RSS Reader cuts off after first pragraph
本文介绍了Android RSS阅读器第一pragraph后切断的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我创造我校报一个应用程序，并试图显示全部文章时，我遇到了一个问题。目前，我有文章似乎是从一个RSS feed拉列表，并点击，当一个它带来了文章的内容。但是，只有第一段显示在TextView的，不管它有多长。这使我太相信它有什么做的＆LT; P＆GT;＆LT; / P＆GT; HTML标签。我不是那个熟悉的RSS订阅或解析XML（这是我第一次尝试它），各地纷纷寻找方法做什么，我试图完成。
I am creating an app for my school newspaper and am running into a problem when trying to display the full article. Currently I have a list of articles appear that are pulled from an RSS feed, and when one is clicked on it brings up the content of the article. However only the first paragraph displays in the TextView, no matter how long it is. This leads me too believe that it has something to do with the <p></p> HTML tags. I am not that familiar with RSS feeds or parsing XML(this being my first time trying it)and have looked around for ways to do what I'm trying to accomplish.
从：<一href=\"http://stackoverflow.com/questions/13690273/android-textview-cuts-off-after-one-paragraph\">Android TextView的后一个段落切断
我创建基于上述问题，结果这个问题。我想用我的应用程序的问题，有一些东西需要与TextView的，它的属性，但通过使用它我很难coded的运行就好了纯文本。
I am creating this question based on results of the above question. I thought the problem with my app had something to do with the TextView and it's properties but by using plain text that I hard coded in it operates just fine.
，这个问题似乎与如何应用从RSS源读取信息。就像我之前说这是我第一次与RSS工作在Android的饲料，而我使用的是示例项目code（可以在previous问题上找到）。下面是相关的RSS提要的code：
Based on the comments and things that I tried, the problem appears to be with how the app is reading information from the RSS feed. Like I said before this is my first time working with RSS feeds in Android, and I am using a sample projects code(can be found in the previous questions). Below is the code relevant to the RSS feed:
的RSSFeed 的.java：
public class RSSFeed {
private String title = null;
private String description = null;
private String link = null;
private String pubdate = null;
private String content = null;
private List<RSSItem> itemList;
RSSFeed(){
itemList = new Vector<RSSItem>(0);
}
void addItem(RSSItem item){
itemList.add(item);
}
RSSItem getItem(int location){
return itemList.get(location);
}
List<RSSItem> getList(){
return itemList;
}
void setTitle(String value){
title = value;
}
void setDescription(String value){
description = value;
}
void setLink(String value){
link = value;
}
void setPubdate(String value){
pubdate = value;
}
public void setContent(String value) {
content=value;
}
String getTitle(){
return title;
}
String getDescription(){
return description;
}
String getLink(){
return link;
}
String getPubdate(){
return pubdate;
}
String getContent() {
return content;
}
}
位于RSSHandler 的.java：
public class RSSHandler extends DefaultHandler {
// Feed and Article objects to use for temporary storage
private Article currentArticle = new Article();
private List<Article> articleList = new ArrayList<Article>();
// Number of articles added so far
private int articlesAdded = 0;
// Number of articles to download
private static final int ARTICLES_LIMIT = 15;
//Current characters being accumulated
StringBuffer chars = new StringBuffer();
/*
* This method is called every time a start element is found (an opening XML marker)
* here we always reset the characters StringBuffer as we are only currently interested
* in the the text values stored at leaf nodes
*
* (non-Javadoc)
* @see org.xml.sax.helpers.DefaultHandler#startElement(java.lang.String, java.lang.String, java.lang.String, org.xml.sax.Attributes)
*/
public void startElement(String uri, String localName, String qName, Attributes atts) {
chars = new StringBuffer();
}
/*
* This method is called every time an end element is found (a closing XML marker)
* here we check what element is being closed, if it is a relevant leaf node that we are
* checking, such as Title, then we get the characters we have accumulated in the StringBuffer
* and set the current Article's title to the value
*
* If this is closing the "Item", it means it is the end of the article, so we add that to the list
* and then reset our Article object for the next one on the stream
*
*
* (non-Javadoc)
* @see org.xml.sax.helpers.DefaultHandler#endElement(java.lang.String, java.lang.String, java.lang.String)
*/
public void endElement(String uri, String localName, String qName) throws SAXException {
if (localName.equalsIgnoreCase("title"))
{
Log.d("LOGGING RSS XML", "Setting article title: " + chars.toString());
currentArticle.setTitle(chars.toString());
}
else if (localName.equalsIgnoreCase("description"))
{
Log.d("LOGGING RSS XML", "Setting article description: " + chars.toString());
currentArticle.setDescription(chars.toString());
}
else if (localName.equalsIgnoreCase("pubDate"))
{
Log.d("LOGGING RSS XML", "Setting article published date: " + chars.toString());
currentArticle.setPubDate(chars.toString());
}
else if (localName.equalsIgnoreCase("encoded"))
{
Log.d("LOGGING RSS XML", "Setting article content: " + chars.toString());
currentArticle.setEncodedContent(chars.toString());
}
else if (localName.equalsIgnoreCase("item"))
{
}
else if (localName.equalsIgnoreCase("link"))
{
try {
Log.d("LOGGING RSS XML", "Setting article link url: " + chars.toString());
currentArticle.setUrl(new URL(chars.toString()));
} catch (MalformedURLException e) {
Log.e("RSA Error", e.getMessage());
}
}
// Check if looking for article, and if article is complete
if (localName.equalsIgnoreCase("item")) {
articleList.add(currentArticle);
currentArticle = new Article();
// Lets check if we've hit our limit on number of articles
articlesAdded++;
if (articlesAdded >= ARTICLES_LIMIT)
{
throw new SAXException();
}
}
}
/*
* This method is called when characters are found in between XML markers, however, there is no
* guarantee that this will be called at the end of the node, or that it will be called only once
* , so we just accumulate these and then deal with them in endElement() to be sure we have all the
* text
*
* (non-Javadoc)
* @see org.xml.sax.helpers.DefaultHandler#characters(char[], int, int)
*/
public void characters(char ch[], int start, int length) {
chars.append(new String(ch, start, length));
}
/**
* This is the entry point to the parser and creates the feed to be parsed
*
* @param feedUrl
* @return
*/
public List<Article> getLatestArticles(String feedUrl) {
URL url = null;
try {
SAXParserFactory spf = SAXParserFactory.newInstance();
SAXParser sp = spf.newSAXParser();
XMLReader xr = sp.getXMLReader();
url = new URL(feedUrl);
xr.setContentHandler(this);
xr.parse(new InputSource(url.openStream()));
} catch (IOException e) {
Log.e("RSS Handler IO", e.getMessage() + " >> " + e.toString());
} catch (SAXException e) {
Log.e("RSS Handler SAX", e.toString());
} catch (ParserConfigurationException e) {
Log.e("RSS Handler Parser Config", e.toString());
}
return articleList;
}
}
的RSSItem 的.java：
public class RSSItem {
private String title = null;
private String description = null;
private String link = null;
private String pubdate = null;
private String content = null;
RSSItem(){
}
void setTitle(String value){
title = value;
}
void setDescription(String value){
description = value;
}
void setLink(String value){
link = value;
}
void setPubdate(String value){
pubdate = value;
}
public void setContent(String value) {
content=value;
}
String getTitle(){
return title;
}
String getDescription(){
return description;
}
String getLink(){
return link;
}
String getPubdate(){
return pubdate;
}
public String getContent() {
return content;
}
@Override
public String toString() {
// TODO Auto-generated method stub
return title;
}
}
AllStoriesFragment 的.java：
public class AllStoriesFragment extends ListFragment {
/*********************************************************************
* RSS Async Task
*********************************************************************/
public class RssLoadingTask extends AsyncTask<Void, Void, Void> {
@Override
protected void onPostExecute(Void result) {
// TODO Auto-generated method stub
displayRss();
}
@Override
protected void onPreExecute() {
// TODO Auto-generated method stub
preReadRss();
}
@Override
protected void onProgressUpdate(Void... values) {
// TODO Auto-generated method stub
//super.onProgressUpdate(values);
}
@Override
protected Void doInBackground(Void... arg0) {
// TODO Auto-generated method stub
readRss();
return null;
}
}
/*********************************************************************
* End RSS Async Task
*********************************************************************/
private RSSFeed myRssFeed = null;
TextView feedTitle;
TextView feedDescription;
/*********************************************************************
* Custom Array Adapter
*********************************************************************/
public class MyCustomAdapter extends ArrayAdapter<RSSItem> {
public MyCustomAdapter(Context context, int textViewResourceId, List<RSSItem> list) {
super(context, textViewResourceId, list);
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
//return super.getView(position, convertView, parent);
View row = convertView;
if(row==null){
LayoutInflater inflater=getActivity().getLayoutInflater();
row=inflater.inflate(R.layout.row, parent, false);
}
//Set Item Title
TextView listTitle=(TextView)row.findViewById(R.id.listtitle);
listTitle.setText(myRssFeed.getList().get(position).getTitle());
//Set Item PubDate
TextView listPubdate=(TextView)row.findViewById(R.id.listpubdate);
listPubdate.setText(myRssFeed.getList().get(position).getPubdate());
if (position%2 == 0){
listTitle.setBackgroundColor(0xff101010);
listPubdate.setBackgroundColor(0xff101010);
}
else{
listTitle.setBackgroundColor(0xff080808);
listPubdate.setBackgroundColor(0xff080808);
}
return row;
}
}
/*********************************************************************
* End Custom Array Adapter
*********************************************************************/
/** Called when the fragment is first created. */
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
// Inflate the layout for this fragment
View v = inflater.inflate(R.layout.fragment_allstories, null);
Log.d("MainActivity", "AllStoriesFragment started.");
feedTitle = (TextView)v.findViewById(R.id.feedtitle);
feedDescription = (TextView)v.findViewById(R.id.feeddescription);
startReadRss();
return v ;
}
private void startReadRss(){
new RssLoadingTask().execute();
}
private void preReadRss(){
setListAdapter(null);
Toast.makeText(getActivity(), "Reading RSS, Please wait.", Toast.LENGTH_LONG).show();
}
private void readRss(){
try {
URL rssUrl = new URL("http://www.campusslate.com/feed/");
InputSource myInputSource = new InputSource(rssUrl.openStream());
SAXParserFactory mySAXParserFactory = SAXParserFactory.newInstance();
SAXParser mySAXParser = mySAXParserFactory.newSAXParser();
RSSHandler myRSSHandler = new RSSHandler();
XMLReader myXMLReader = mySAXParser.getXMLReader();
myXMLReader.setContentHandler(myRSSHandler);
myXMLReader.parse(myInputSource);
myRssFeed = myRSSHandler.getFeed();
}
catch (MalformedURLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
catch (ParserConfigurationException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
catch (SAXException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
private void displayRss(){
if (myRssFeed!=null){
MyCustomAdapter adapter = new MyCustomAdapter(getActivity(), R.layout.row, myRssFeed.getList());
setListAdapter(adapter);
}
}
public void onListItemClick(ListView l, View v, int position, long id) {
// TODO Auto-generated method stub
Intent intent = new Intent(getActivity(), ShowDetails.class);
intent.putExtra("keyPubdate", myRssFeed.getItem(position).getPubdate());
intent.putExtra("keyLink", myRssFeed.getItem(position).getLink());
intent.putExtra("keyTitle", myRssFeed.getItem(position).getTitle());
intent.putExtra("keyContent", myRssFeed.getItem(position).getContent());
startActivity(intent);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// TODO Auto-generated method stub
switch(item.getItemId()){
case (0): readRss();
break;
default:
break;
}
return true;
}
}
ShowDetails.java被张贴在另一个问题，虽然code可能是从我目前有略有不同。现在的问题是，在列表中的每个产品从RSS源读取的最后一个项目。
ShowDetails.java is posted in the other question, though the code may be slightly different from what I have currently. The issue now is that every item in the list is the last item read from the RSS Feed.
想如果我有足够的声誉张贴图片。
Would post an image if I had enough reputation.
推荐答案
这是XML元素可以有多个文本节点。您code假定只有一个。请使用追加操作，而不是设置操作，在你的字符（）回调。
An XML element may have multiple text nodes. Your code assumes that there is only one. Please use an append operation, not a set operation, in your characters() callback.
这篇关于Android RSS阅读器第一pragraph后切断的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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