【发布时间】：2014-07-24 15:00:06
【问题描述】：
我正在解析一个 RSS 提要。下载流，甚至设置解析器。但是当我将事件设为空时。此语句“int eventType = parser.getEventType();”始终为空。 我没有任何例外。它不阅读标签。 这是我的解析器：
public class RssParser {
public ArrayList<Item> parseXml(XmlPullParser parser) throws XmlPullParserException,IOException{
ArrayList<Item> feed=null;
Item currentFeed=null;
int eventType=parser.getEventType();
while(eventType != XmlPullParser.END_DOCUMENT){
String currentTag = null;
switch(eventType){
case XmlPullParser.START_DOCUMENT:
feed = new ArrayList<Item>();
break;
case XmlPullParser.START_TAG:
currentTag = parser.getName();
if(currentTag.equalsIgnoreCase("item")){
currentFeed = new Item();
}
else if(currentFeed != null){
if(currentTag.equalsIgnoreCase("title")){
currentFeed.title=parser.nextText();
}
else if(currentTag.equalsIgnoreCase("description")){
currentFeed.description=parser.nextText();
}
}
break;
case XmlPullParser.END_TAG:
currentTag = parser.getName();
if(currentTag.equalsIgnoreCase("item") && (currentFeed != null)){
feed.add(currentFeed);
}
}
eventType = parser.next();
}
return feed;
}
}
In this class i downloaded the parser & instantiating it.
private List<Item> downloadUrl(String urlString) throws IOException{
InputStream stream;
List<Item> items=null;
try {
URL url = new URL(urlString);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setReadTimeout(10000 );
conn.setConnectTimeout(15000 );
conn.setRequestMethod("GET");
conn.setDoInput(true);
conn.connect();
int response = conn.getResponseCode();
Log.d("response","" +response);
stream = conn.getInputStream();
XmlPullParserFactory pullParser;
try{
pullParser=XmlPullParserFactory.newInstance();
XmlPullParser parser=pullParser.newPullParser();
parser.setFeature(XmlPullParser.FEATURE_PROCESS_NAMESPACES, false);
parser.setInput(stream, null);
RssParser rssObj=new RssParser();
rssObj.parseXml(parser);
Log.d("parser", ""+parser);
}catch(XmlPullParserException e1){
e1.printStackTrace();
}
catch (IOException e2) {
e2.printStackTrace();
}
} finally{
}
return items;
}
解析器出了什么问题。我会很感激你，请帮助我摆脱这个问题
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