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1、处理post请求 public class HttpGet extends Activity { private boolean isAuthenticated; private ArrayList<BasicNameValuePair> pairs; private DefaultHttpClient httpclient; private HttpPost httppost; private InputStream content; private String returnConnection; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); TextView tv=new TextView(this); Map vars=new HashMap(); vars.put("mydata", "Hello,Android"); ParameterHttp("http://5billion.com.cn/post.php",vars); doPost(); tv.setText(this.returnConnection); this.setContentView(tv); } private void ParameterHttp(String url, Map vars) { this.httpclient=new DefaultHttpClient(); this.httppost=new HttpPost(url); this.pairs=new ArrayList(); if(vars!=null){ Set keys=vars.keySet(); for(Iterator i=keys.iterator();i.hasNext();){ String key=(String)i.next(); pairs.add(new BasicNameValuePair(key,(String) vars.get(key))); } } } private String doPost() { try{ UrlEncodedFormEntity p_entity=new UrlEncodedFormEntity(pairs,"ISO-8859-1"); httppost.setEntity(p_entity); HttpResponse response=httpclient.execute(httppost); HttpEntity entity=response.getEntity(); content=entity.getContent(); this.returnConnection=convertStreamToString(content); Log.d("HttpPostConnection",">>>>>>>>>"+returnConnection); int status_code=response.getStatusLine().getStatusCode(); if(status_code>=300){ this.isAuthenticated=false; }else{ this.isAuthenticated=true; } }catch (Exception e) { // TODO: handle exception } return returnConnection; } private static String convertStreamToString(InputStream is) { /* * To convert the InputStream to String we use the BufferedReader.readLine() * method. We iterate until the BufferedReader return null which means * there's no more data to read. Each line will appended to a StringBuilder * and returned as String. */ BufferedReader reader = new BufferedReader(new InputStreamReader(is)); StringBuilder sb = new StringBuilder(); String line = null; try { while ((line = reader.readLine()) != null) { sb.append(line + "\n"); } } catch (IOException e) { e.printStackTrace(); } finally { try { is.close(); } catch (IOException e) { e.printStackTrace(); } } return sb.toString(); } 3、SAX解析xml public class HttpGet extends Activity{ @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); TextView tv=new TextView(this); try{ URL url=new URL("http://5billion.com.cn/example.xml"); //从SAXParserFactor获取SAXParser SAXParserFactory spf=SAXParserFactory.newInstance(); SAXParser sp=spf.newSAXParser(); //从SAXParser获取XMLReader XMLReader xr=sp.getXMLReader(); //创建文明自己的内容处理器 ExampleHandler myExampleHandler=new ExampleHandler(); //用内容处理器处理XMLReader xr.setContentHandler(myExampleHandler); //XMLReader获取xml文件 xr.parse(new InputSource(url.openStream())); //用ExampleHandle解析XML中数据 ParsedExampleDataSet parsedExampleDataSet=myExampleHandler.getParsedData(); //将解析的结果显示到gui tv.setText(parsedExampleDataSet.toString()); }catch (Exception e) { tv.setText(e.getMessage()); } this.setContentView(tv); } class ExampleHandler extends DefaultHandler { private boolean in_outertag=false; private boolean in_innertag=false; private boolean in_mytag=false; private ParsedExampleDataSet myParsedExampleDataSet=new ParsedExampleDataSet(); public ParsedExampleDataSet getParsedData(){ return this.myParsedExampleDataSet; } @Override public void characters(char[] ch, int start, int length) throws SAXException { if(this.in_mytag){ String str=new String(ch,start,length); myParsedExampleDataSet.setExtractedString(str); Log.v("ParsingXML","Characters():"+str); } } @Override public void startDocument() throws SAXException { this.myParsedExampleDataSet=new ParsedExampleDataSet(); Log.v("ParsingXML","startDocument"); } @Override public void endDocument() throws SAXException { Log.v("ParsingXML","endDocumnet"); } @Override public void startElement(String uri, String localName, String name, Attributes attributes) throws SAXException { if(localName.equals("outertag")){ this.in_outertag=true; }else if(localName.equals("innertag")){ this.in_innertag=true; }else if(localName.equals("mytag")){ this.in_mytag=true; }else if(localName.equals("tagwithnumber")){ String attrValue=attributes.getValue("thenumber"); int i=Integer.parseInt(attrValue); this.myParsedExampleDataSet.setExtractedInt(i); } Log.v("ParsingXML","StartElement():"+localName); } @Override public void endElement(String uri, String localName, String name) throws SAXException { if(localName.equals("outertag")){ this.in_outertag=false; }else if(localName.equals("innertag")){ this.in_innertag=false; }else if(localName.equals("mytag")){ this.in_mytag=false; }else if(localName.equals("tagwithnumber")){ //nothing to do } Log.v("ParsingXML","endElement():"+localName); } } class ParsedExampleDataSet { private String extractedString=null; private int extractedInt=0; public void setExtractedString(String extractedString) { this.extractedString = extractedString; } public void setExtractedInt(int extractedInt) { this.extractedInt = extractedInt; } @Override public String toString() { // TODO Auto-generated method stub return "String from XML="+this.extractedString+"\n Number from XML="+this.extractedInt; } } }

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