Android advanced 2: HTTP access network

Procedure:

<1>

Generate request object

Httpget = new httpget ("request address ..... ");

<2>

Generate client object

Httpclient = new defaulthttpclient ();

<3>

Execute request

Httpresponse = httpclient.exe cute (httpget );

<4>

Accept response

Httpentity = httpresponse. getentity ();

<5> get data stream

Inputstream = httpentity. getcontent ();

Note:

To add permissions: <uses-Permission Android: Name = "android. Permission. Internet"/>

Specific implementation:

Package xiaosi. httpresponse; </P> <p> Import Java. io. bufferedreader; <br/> Import Java. io. ioexception; <br/> Import Java. io. inputstream; <br/> Import Java. io. inputstreamreader; </P> <p> Import Org. apache. HTTP. httpentity; <br/> Import Org. apache. HTTP. httpresponse; <br/> Import Org. apache. HTTP. client. clientprotocolexception; <br/> Import Org. apache. HTTP. client. httpclient; <br/> Import Org. apache. HTTP. client. metho DS. httpget; <br/> Import Org. apache. HTTP. impl. client. defaulthttpclient; </P> <p> Import android. app. activity; <br/> Import android. OS. bundle; <br/> Import android. view. view; <br/> Import android. view. view. onclicklistener; <br/> Import android. widget. button; <br/> Import android. widget. textview; </P> <p> public class httpresponseactivity extends activity <br/>{< br/> private buttonbutton = NULL; <br/> private Tex Tviewtext = NULL; <br/> private httpresponsehttpresponse = NULL; <br/> private httpentityhttpentity = NULL; </P> <p> @ override <br/> Public void oncreate (bundle savedinstancestate) <br/>{< br/> super. oncreate (savedinstancestate); <br/> setcontentview (R. layout. main); <br/> text = (textview) findviewbyid (R. id. text); <br/> button = (button) findviewbyid (R. id. button); <br/> button. setonclicklistener (New onclicklist Ener () {<br/> @ override <br/> Public void onclick (view v) <br/>{< br/> // generate a request object, the parameter is the address <br/> httpget = new httpget ("http://www.baidu.com"); <br/> // generate the HTTP client <br/> httpclient = new defaulthttpclient (); <br/> inputstream = NULL; <br/> // use an HTTP client to send a request object <br/> try <br/> {<br/> // send a request response <br/> httpresponse = httpclient.exe cute (httpget ); <br/> // indicates the received HTTP message. All the messages returned by the server are in httpenti Ty <br/> httpentity = httpresponse. getentity (); <br/> If (httpresponse. getstatusline (). getstatuscode () = 200) {<br/> inputstream = httpentity. getcontent (); <br/> bufferedreader reader = new bufferedreader (New inputstreamreader (inputstream); <br/> string result = ""; <br/> string line = ""; <br/> while (line = reader. readline ())! = NULL) <br/>{< br/> result = Result + line; <br/>}</P> <p> text. settext (result); <br/>}< br/> catch (clientprotocolexception e) <br/>{< br/> E. printstacktrace (); <br/>}< br/> catch (exception e) <br/>{< br/> E. printstacktrace (); <br/>}< br/> finally <br/>{< br/> try <br/>{< br/> inputstream. close (); <br/>}< br/> catch (ioexception e) <br/>{< br/> E. printstacktrace (); <br/>}< br/>}); <br/>}< br/>