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我是Android新手，我做了一个简单的应用程序，它从XML RSS源读取数据，并将其呈现给用户。它在android 2.2或更高版本的电话以及android 2.1的模拟器上工作正常，但在使用android 2.1的电话上正常化DOM文档时引发异常。在Android 2.1上解析DOM的问题
这里是代码的一部分：
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
DocumentBuilder db = dbf.newDocumentBuilder();
Document dom = db.parse(in);
Element docEle = dom.getDocumentElement();
dom.normalize();
NodeList nl = docEle.getElementsByTagName("item");
if (nl != null && nl.getLength() > 0) {
//some stuff here
}
在与指令dom.normalize线（）应用程序将引发以下情况例外：
06-15 17:20:01.161: ERROR/ActivityManager(79): fail to set top app changed!
06-15 17:20:07.501: ERROR/AndroidRuntime(1199): Uncaught handler: thread refresh_news exiting due to uncaught exception
06-15 17:20:07.531: ERROR/AndroidRuntime(1199): org.w3c.dom.DOMException
06-15 17:20:07.531: ERROR/AndroidRuntime(1199): at org.apache.harmony.xml.dom.InnerNodeImpl.removeChild(InnerNodeImpl.java:184)
06-15 17:20:07.531: ERROR/AndroidRuntime(1199): at org.apache.harmony.xml.dom.InnerNodeImpl.normalize(InnerNodeImpl.java:161)
06-15 17:20:07.531: ERROR/AndroidRuntime(1199): at com.krawczyk.lech.services.NewsService.doRefreshNews(NewsService.java:231)
06-15 17:20:07.531: ERROR/AndroidRuntime(1199): at com.krawczyk.lech.services.NewsService.access$0(NewsService.java:209)
06-15 17:20:07.531: ERROR/AndroidRuntime(1199): at com.krawczyk.lech.services.NewsService$1.run(NewsService.java:201)
06-15 17:20:07.531: ERROR/AndroidRuntime(1199): at java.lang.Thread.run(Thread.java:1102)
06-15 17:20:07.551: ERROR/dalvikvm(1199): Unable to open stack trace file '/data/anr/traces.txt': Permission denied
是它的Android 2.1的一个普遍的问题或者是它我的错？？请帮忙。