嗨，我使用 kxml jar 来解析来自 Web 服务的数据。我以前在其他项目中使用过..但现在我在新项目中使用相同的，但我收到错误，我无法对其进行故障排除..
我的 xml 文件将如下所示：
<rss version="2.0">
<tttt>gsdsj</tttt>
<dddd>urkjrnf</dddd>
<item>
<title>ghsdsjhdsjdb</title>
<description>fgdhshbsdb</description>
</item>
<item>
<title>ghsdsjhdsjdb</title>
<description>fgdhshbsdb</description>
</item>
<item>
<title>ghsdsjhdsjdb</title>
<description>fgdhshbsdb</description>
</item>
</rss>
我想得到那个头衔。
我的解析器文件是：
public class TaplistingParser
{
public TaplistingParser()
{
}
public String getXmlFromUrl(String url)
{
String xml=null;
DefaultHttpClient httpclient=new DefaultHttpClient();
HttpPost httpPost=new HttpPost(url);
try
{
HttpResponse httpresponse = httpclient.execute(httpPost);
HttpEntity httpentity=httpresponse.getEntity();
xml=EntityUtils.toString(httpentity);
}
catch (ClientProtocolException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
catch (IOException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
// System.out.println("xml="+xml);
return xml;
}
public Document getDomElement(String xml)
{
Document doc=null;
DocumentBuilderFactory dbf= DocumentBuilderFactory.newInstance();
dbf.setCoalescing(true);
try
{
DocumentBuilder db= dbf.newDocumentBuilder();
InputSource is= new InputSource();
is.setCharacterStream(new StringReader(xml));
try {
doc=db.parse(is);
} catch (SAXException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
catch (ParserConfigurationException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
return doc;
}
public final String getElementValue( Node elem ) {
Node child;
if( elem != null){
if (elem.hasChildNodes()){
for( child = elem.getFirstChild(); child != null; child = child.getNextSibling() ){
// if( child.getNodeType() == Node.TEXT_NODE ){
return child.getNodeValue();
// }
}
}
}
return "";
}
/**
* Getting node value
* @param Element node
* @param key string
* */
public String getValue(Element item, String str) {
NodeList n = item.getElementsByTagName(str);
return this.getElementValue(n.item(0));
}
}
我的活动代码：
public void getelement()
{
TaplistingParser parser = new TaplistingParser();
String xml= parser.getXmlFromUrl(URL);
Document doc=parser.getDomElement(xml);
NodeList nl=doc.getElementsByTagName("item");
title = new String[nl.getLength()];
for(int i=0; i < nl.getLength(); i++ )
{
Element e = (Element) nl.item(i);
title[i]=parser.getValue(e, "title");
}
}
我的日志是：
12-11 15:58:42.962: W/System.err(551): org.xml.sax.SAXParseException: expected: /META read: HEAD (position:END_TAG </HEAD>@11:8 in java.io.StringReader@44c60e80)
12-11 15:58:42.982: W/System.err(551): at org.apache.harmony.xml.parsers.DocumentBuilderImpl.parse(DocumentBuilderImpl.java:151)
12-11 15:58:42.992: W/System.err(551): at parser.TaplistingParser.getDomElement(TaplistingParser.java:67)
12-11 15:58:42.992: W/System.err(551): at your.com.font.FontActivity.getelement(FontActivity.java:42)
12-11 15:58:43.023: W/System.err(551): at your.com.font.FontActivity.onCreate(FontActivity.java:25)
12-11 15:58:43.032: W/System.err(551): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
12-11 15:58:43.032: W/System.err(551): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2459)
12-11 15:58:43.032: W/System.err(551): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2512)
12-11 15:58:43.042: W/System.err(551): at android.app.ActivityThread.access$2200(ActivityThread.java:119)
12-11 15:58:43.042: W/System.err(551): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1863)
12-11 15:58:43.042: W/System.err(551): at android.os.Handler.dispatchMessage(Handler.java:99)
12-11 15:58:43.042: W/System.err(551): at android.os.Looper.loop(Looper.java:123)
12-11 15:58:43.042: W/System.err(551): at android.app.ActivityThread.main(ActivityThread.java:4363)
12-11 15:58:43.042: W/System.err(551): at java.lang.reflect.Method.invokeNative(Native Method)
12-11 15:58:43.042: W/System.err(551): at java.lang.reflect.Method.invoke(Method.java:521)
12-11 15:58:43.042: W/System.err(551): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
12-11 15:58:43.042: W/System.err(551): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
12-11 15:58:43.052: W/System.err(551): at dalvik.system.NativeStart.main(Native Method)
12-11 15:58:43.052: D/AndroidRuntime(551): Shutting down VM
12-11 15:58:43.052: W/dalvikvm(551): threadid=3: thread exiting with uncaught exception (group=0x4001b188)
12-11 15:58:43.062: E/AndroidRuntime(551): Uncaught handler: thread main exiting due to uncaught exception
12-11 15:58:43.072: E/AndroidRuntime(551): java.lang.RuntimeException: Unable to start activity ComponentInfo{your.com.font/your.com.font.FontActivity}: java.lang.NullPointerException
12-11 15:58:43.072: E/AndroidRuntime(551): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2496)
12-11 15:58:43.072: E/AndroidRuntime(551): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2512)
12-11 15:58:43.072: E/AndroidRuntime(551): at android.app.ActivityThread.access$2200(ActivityThread.java:119)
12-11 15:58:43.072: E/AndroidRuntime(551): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1863)
12-11 15:58:43.072: E/AndroidRuntime(551): at android.os.Handler.dispatchMessage(Handler.java:99)
12-11 15:58:43.072: E/AndroidRuntime(551): at android.os.Looper.loop(Looper.java:123)
12-11 15:58:43.072: E/AndroidRuntime(551): at android.app.ActivityThread.main(ActivityThread.java:4363)
12-11 15:58:43.072: E/AndroidRuntime(551): at java.lang.reflect.Method.invokeNative(Native Method)
12-11 15:58:43.072: E/AndroidRuntime(551): at java.lang.reflect.Method.invoke(Method.java:521)
12-11 15:58:43.072: E/AndroidRuntime(551): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)
12-11 15:58:43.072: E/AndroidRuntime(551): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
12-11 15:58:43.072: E/AndroidRuntime(551): at dalvik.system.NativeStart.main(Native Method)
12-11 15:58:43.072: E/AndroidRuntime(551): Caused by: java.lang.NullPointerException
12-11 15:58:43.072: E/AndroidRuntime(551): at your.com.font.FontActivity.getelement(FontActivity.java:44)
12-11 15:58:43.072: E/AndroidRuntime(551): at your.com.font.FontActivity.onCreate(FontActivity.java:25)
12-11 15:58:43.072: E/AndroidRuntime(551): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
12-11 15:58:43.072: E/AndroidRuntime(551): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2459)
12-11 15:58:43.072: E/AndroidRuntime(551): ... 11 more
12-11 15:58:43.102: I/dalvikvm(551): threadid=7: reacting to signal 3
12-11 15:58:43.202: I/dalvikvm(551): Wrote stack trace to '/data/anr/traces.txt'
提前致谢..