Android HTTP and XML Parsing

Form 1

Package HTTP. view; import Java. io. ioexception; import Java. io. stringreader; import Java. util. arraylist; import Java. util. iterator; import Java. util. list; import javax. XML. parsers. saxparserfactory; import Mars. modle. mp3info; import Org. apache. HTTP. httpentity; import Org. apache. HTTP. httpresponse; import Org. apache. HTTP. httpstatus; import Org. apache. HTTP. namevaluepair; import Org. apache. HTTP. client. clientprotocolexception; import Org. apache. HTTP. client. httpclient; import Org. apache. HTTP. client. entity. urlencodedformentity; import Org. apache. HTTP. client. methods. httppost; import Org. apache. HTTP. impl. client. defaulthttpclient; import Org. apache. HTTP. message. basicnamevaluepair; import Org. apache. HTTP. util. entityutils; import Org. XML. sax. inputsource; import Org. XML. sax. xmlreader; import android. app. activity; import android. content. intent; import android. OS. bundle; import android. view. view; import android. widget. button; import android. widget. textview; public class Post extends activity {textview mtextview = NULL; @ override protected void oncreate (bundle savedinstancestate) {// todo auto-generated method stub super. oncreate (savedinstancestate); setcontentview (R. layout. post); mtextview = (textview) This. findviewbyid (R. id. my); // HTTP address string httpurl = "http://wap.51tes.com/ I .asmx/c"; // get the data httppost httprequest = new httppost (httpurl ); // use namevaluepair to save the list of post data to be passed <namevaluepair> Params = new arraylist <namevaluepair> (); // Add the required parameter Params. add (New basicnamevaluepair ("C1", "Wm"); Params. add (New basicnamevaluepair ("C2", "240*320"); Params. add (New basicnamevaluepair ("C3", "1.0"); Params. add (New basicnamevaluepair ("C4", "6365 t"); try {// set the character set httpentity = new urlencodedformentity (Params, "utf8 "); // request httprequest. setentity (httpentity); // get the default httpclient = new response (); // get httpresponse = destination cute (httprequest); // If (httpresponse. getstatusline (). getstatuscode () = httpstatus. SC _ OK) {// obtain the returned string strresult = entityutils. tostring (httpresponse. getentity (); mtextview. settext (strresult); parse (strresult);} else {mtextview. settext ("request error") ;}} catch (clientprotocolexception e) {mtextview. settext (E. getmessage (). tostring ();} catch (ioexception e) {mtextview. settext (E. getmessage (). tostring ();} catch (exception e) {mtextview. settext (E. getmessage (). tostring ();} // set the button event listening button button_back = (button) findviewbyid (R. id. button_back_post);/* Listen to the time information of the button */button_back.setonclicklistener (New button. onclicklistener () {public void onclick (view v) {/* Create an intent object */intent = new intent ();/* specify the intent class */intent. setclass (post. this, HTTP. class);/* start a new activity */startactivity (intent);/* close the current activity */post. this. finish () ;}}) ;}private list <mp3info> parse (string xmlstr) {saxparserfactory = saxparserfactory. newinstance (); List <mp3info> Infos = new arraylist <mp3info> (); try {xmlreader = saxparserfactory. newsaxparser (). getxmlreader (); mycontenthandler mp3listcontenthandler = new mycontenthandler (Infos); xmlreader. setcontenthandler (mp3listcontenthandler); xmlreader. parse (New inputsource (New stringreader (xmlstr); For (iterator <mp3info> iterator = Infos. iterator (); iterator. hasnext ();) {mp3info mp3info = iterator. next (); system. out. println (mp3info) ;}} catch (exception e) {e. printstacktrace () ;}return Infos ;}}

Form 2

Package HTTP. view; import Java. util. list; import Mars. modle. mp3info; import Org. XML. sax. attributes; import Org. XML. sax. saxexception; import Org. XML. sax. helpers. defaulthandler; public class mycontenthandler extends defaulthandler {private list <mp3info> Infos = NULL; Public mycontenthandler (list <mp3info> Infos) {super (); this. infos = Infos;} public list <mp3info> getinfos () {return Infos;} public void setinfos (list <mp3info> Infos) {This. infos = Infos;} private mp3info mp3info = NULL; private string tagname; Public void startdocument () throws saxexception {} public void enddocument () throws saxexception {} public void startelement (string namespaceuri, string localname, string QNAME, attributes ATTR) throws saxexception {This. tagname = localname; If (localname. equals ("e") {mp3info = new mp3info () ;}} public void endelement (string namespaceuri, string localname, string QNAME, attributes ATTR) throws saxexception {If (QNAME. equals ("e") {Infos. add (mp3info);} tagname = NULL;} public void characters (char [] CH, int start, int length) throws saxexception {string temp = new string (CH, start, length); If (tagname. equals ("E1") {mp3info. sete1 (temp);} else if (tagname. equals ("E2") {mp3info. sete2 (temp);} else if (tagname. equals ("E3") {mp3info. sete3 (temp);} else if (tagname. equals ("E4") {mp3info. sete4 (temp);} else if (tagname. equals ("E5") {mp3info. sete5 (temp );}}}