我一直试图让它工作三个小时。这些是我试过的两段代码和到xml文件的链接。有人可以告诉我什么即时做错或如何轻松做到这一点?我只想在“current_conditions”元素中获取当前临时存储为“temp_f”的临时值。如果有更好的做法比我想知道的任何一次尝试都好。非常感谢!如何解析Android中的天气xml数据
这里是一个XML文件,我从网上下载的链接: http://www.google.com/ig/api?weather=10598
这是我用它来从网络中的XML数据的代码:
HttpClient client = new DefaultHttpClient();
HttpGet get = new HttpGet(url);
// HttpGet get = new HttpGet();
try {
HttpResponse rsp = client.execute(get);
String xmltemp = EntityUtils.toString(rsp.getEntity());
System.out.println(xmltemp);
然后,我都尝试这些尝试解析XML,但都没有工作。
DocumentBuilderFactory factory1 = DocumentBuilderFactory
.newInstance();
factory1.setNamespaceAware(true); // never forget this!
InputSource source = new InputSource(new StringReader(xmltemp));
Document doc = factory1.newDocumentBuilder().parse(source);
doc.getDocumentElement().normalize();
System.out.println("Root element "
+ doc.getDocumentElement().getNodeName());
Log.d("OUTPUT","Root element "
+ doc.getDocumentElement().getNodeName());
NodeList nodeLst = doc.getElementsByTagName("weather");
for (int s = 0; s < nodeLst.getLength(); s++) {
Node fstNode = nodeLst.item(s);
if (fstNode.getNodeType() == Node.ELEMENT_NODE) {
Element fstElmnt = (Element) fstNode;
NodeList fstNmElmntLst = ((Document) fstElmnt)
.getElementsByTagName("module_id");
Element fstNmElmnt = (Element) fstNmElmntLst.item(0);
NodeList fstNm = ((Node) fstNmElmnt).getChildNodes();
System.out.println(((Node) fstNm.item(0)).getNodeValue());
newal.add("" + ((Node) fstNm.item(0)).getNodeValue());
Log.d("OUTPUT","" + ((Node) fstNm.item(0)).getNodeValue());
}
}
而且这样的:
DocumentBuilderFactory factory1 = DocumentBuilderFactory
.newInstance(); factory1.setNamespaceAware(true); // never forget this!
InputSource source = new InputSource(new
StringReader(xmltemp)); Document doc =
factory1.newDocumentBuilder().parse(source);
XPathFactory factory11 = XPathFactory.newInstance(); XPath xpath1
= factory11.newXPath(); XPathExpression expr1 = xpath1 .compile(
"//forecast_information[postal_code='10598']/forecast_date/text()"
); Object result = expr1.evaluate(doc, XPathConstants.NODESET);
NodeList nodes = (NodeList) result; for (int i = 0; i <
nodes.getLength(); i++) {
System.out.println(nodes.item(i).getNodeValue());
Log.d("1010101010101",nodes.item(i).getNodeValue()); }
编辑: 所以这是代码即时试图使用现在,但我每次运行它的时候我得到这个错误的logcat:
09-15 20:26:47.359: DEBUG/ErOr(17663): java.lang.ClassCastException: org.apache.harmony.xml.dom.ElementImpl
这是代码:
DocumentBuilderFactory factory1 = DocumentBuilderFactory.newInstance();
factory1.setNamespaceAware(true); // never forget this!
InputSource source = new InputSource(new StringReader(xmltemp));
Document doc = factory1.newDocumentBuilder().parse(source);
String newstring = "" + ((DocumentBuilderFactory) ((Document) doc.getDocumentElement().
getElementsByTagName("current_conditions").item(0)).
getElementsByTagName("temp_f").item(0)).
getAttribute("data");
我试过,但getChildNodes说“类型节点中的方法getChildNodes()不适用于参数(字符串)” – Peter
你是绝对正确的 - 面对手掌 - DOM API真的很糟糕 - 我已经成为过去习惯于使用JDOM,这更加安全。我将编辑答案... –
谢谢...也许这是一个愚蠢的问题,但我如何获取数据到一个字符串,所以我可以测试,看看它实际上是否工作? – Peter