Android中写入读取XML

获取XML文件的基本思路是，通过getResources().getXml()获的XML原始文件，得到XmlResourceParser对象，通过该对象来判断是文档的开头还是结尾，是某个标签的开始还是结尾，并通过一些获取属性的方法来遍历XML文件，从而访问XML文件的内容，下面是一个访问XML文件内容的例子，并将内容更显示在一个TextView上

数据写入xml:

ReadXMLTest.java

//xml数据生成private String WriteToString() {XmlSerializer serializer = Xml.newSerializer();StringWriter writer = new StringWriter();try {serializer.setOutput(writer);serializer.startDocument("utf-8", true);serializer.startTag("", "users");serializer.startTag("", "userName");serializer.text(txtUser.getText().toString());serializer.endTag("", "userName");serializer.startTag("", "userEmail");serializer.text(txtEmail.getText().toString());serializer.endTag("", "userEmail");serializer.startTag("", "passWord");serializer.text(txtPass.getText().toString());serializer.endTag("", "passWord");serializer.endTag("", "users");serializer.endDocument();} catch (IllegalArgumentException e) {// TODO: handle exceptione.printStackTrace();} catch (IllegalStateException e) {// TODO: handle exceptione.printStackTrace();} catch (IOException e) {// TODO: handle exceptione.printStackTrace();}return writer.toString();}//将字符串保存为apk的私有文件private boolean writeToXml(String str) {try {OutputStream out = openFileOutput("users.xml",MODE_PRIVATE);OutputStreamWriter outWriter = new OutputStreamWriter(out);try {outWriter.write(str);outWriter.close();out.close();return true;} catch (IOException e) {// TODO: handle exceptionreturn false;}} catch (Exception e) {// TODO: handle exceptionreturn false;}}

调用时:

if(writeToXml(WriteToString()))

{

      //成功

}

数据读取 xml:

//tag ,存入的节点名

private String ReadXmlUser(String tag){String re="";DocumentBuilderFactory documentBuilderFactory;DocumentBuilder documentBuilder;Document document;try {documentBuilderFactory=DocumentBuilderFactory.newInstance();documentBuilder=documentBuilderFactory.newDocumentBuilder();//xml文件放到assets目录下document=documentBuilder.parse(this.openFileInput("users.xml"));org.w3c.dom.Element root= document.getDocumentElement();NodeList nodeList=root.getElementsByTagName(tag);Node nd=nodeList.item(0);re= nd.getFirstChild().getNodeValue();} catch (Exception e) {// TODO: handle exceptione.printStackTrace();}finally{document=null;documentBuilder=null;documentBuilderFactory=null;}return re;}