android webservices sax 传输并解析xml

android通过服务器后台webservices返回xml数据（问卷），保存本地，并通过sax解析xml

【1】android通过webservice接收xml字符

//调用webservices获取xml问卷

SoapObject QuestionRe =(SoapObject) RemoteWebservice.CallNewQuestion("116307"); if (!QuestionRe.getProperty("wbsGetQuestionInfoResult").toString().equals("error")) { //下载最新问卷 if (XMLUtil.writeToXml(Login.this, QuestionRe.getProperty("wbsGetQuestionInfoResult").toString())== true) { //Toast.makeText(Login.this,"已经下载最新问卷",Toast.LENGTH_LONG).show(); } }

【2】把xml字符接收并保存到本地文件

/** * 字符串文本保存为本地XML * @param str xml字符串 * @return * @author fubin.pan */ public static boolean writeToXml(Context context,String str) { String fileName = "admin_question.xml"; try { OutputStream fos = context.openFileOutput(fileName, Context.MODE_PRIVATE); try{ OutputStreamWriter osw=new OutputStreamWriter(fos); osw.write(str); osw.close(); fos.close(); return true; } catch (IOException e) { e.printStackTrace(); return false; } }catch (FileNotFoundException e) { e.printStackTrace(); return false; } }

【3】通过sax解析本地xml文件

FileInputStream inStream=questionitemlist2.this.openFileInput("admin_question.xml"); Xml.parse(new InputStreamReader(inStream), quesHandler);  public class QuestionHandler extends DefaultHandler { private List<QuestionItem> list; private QuestionItem item; private String tag = ""; private StringBuffer buffer; @Override public void characters(char[] ch, int start, int length) throws SAXException { super.characters(ch, start, length); if(item!=null){ String data = new String(ch,start,length); if(tag.equals("code")){ item.setCode(data); }else if(tag.equals("name")){ item.setName(data); }else if(tag.equals("displayName")){ item.setDisplayName(data); }else if(tag.equals("pubDate")){ item.setitemType(data); }else if(tag.equals("toEnd")){ item.setToEnd(data); }else if(tag.equals("toNext")){ item.setToNext(data); } } } @Override public void endDocument() throws SAXException { super.endDocument(); } @Override public void endElement(String uri, String localName, String qName) throws SAXException { super.endElement(uri, localName, qName); if(localName.equals("item")){ list.add(item); item = null; buffer = null; } tag = ""; } @Override public void startDocument() throws SAXException { super.startDocument(); list = new ArrayList<QuestionItem>(); } @Override public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException { super.startElement(uri, localName, qName, attributes); if(localName.equals("item")){ item = new QuestionItem(); buffer = new StringBuffer(); } tag = localName; } public List<QuestionItem> getData(){ return list; } }

【4】展现xml文件的界面