import java.io.InputStream;
import java.util.HashMap;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

public class ParseXmlService {
public HashMap<String,String> parseXml(InputStream inStream) throws Exception {
HashMap<String,String> hashMap = new HashMap<String,String>();
// 实例化一个文档构建器工厂
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
// 通过文档构建器工厂获取一个文档构建器
DocumentBuilder builder = factory.newDocumentBuilder();
// 通过文档构建器构建一个文档实例
Document document = builder.parse(inStream);
// 通过文档实例获取XML文件根节点
Element root = document.getDocumentElement();
// 获得所有子节点
NodeList childNodes = root.getChildNodes();
// 循环put到HashMap中
for (int j = 0; j < childNodes.getLength(); j++) {
// 遍历子节点
Node childNode = (Node) childNodes.item(j);
if (childNode.getNodeType() == Node.ELEMENT_NODE) {
Element childElement = (Element) childNode;
if ("version".equals(childElement.getNodeName())) { // 版本号
hashMap.put("version",childElement.getFirstChild().getNodeValue());
}else if (("name".equals(childElement.getNodeName()))) {   // 软件名称
hashMap.put("name",childElement.getFirstChild().getNodeValue());
}else if (("url".equals(childElement.getNodeName()))) {  // 下载地址
hashMap.put("url",childElement.getFirstChild().getNodeValue());
}
}
}
return hashMap;
}
}

1.解析事先存放在本地Download目录下的xml：

String path = Environment.getExternalStorageDirectory()+ "/download/xxx.xml";
InputStream inStream = ClassLoader.getSystemResourceAsStream(path);
ParseXmlService service = new ParseXmlService();
try {
mHashMap = service.parseXml(inStream);
} catch (Exception e) {
e.printStackTrace();
}

InputStream inStream = ParseXmlService.class.getClassLoader().getResourceAsStream("xxx.xml");
ParseXmlService service = new ParseXmlService();
try {
mHashMap = service.parseXml(inStream);
} catch (Exception e) {
e.printStackTrace();
}