Android HTTP Tool

Import Java. io. dataoutputstream; import Java. io. file; import Java. io. fileinputstream; import Java. io. ioexception; import Java. io. inputstream; import java.net. httpurlconnection; import java.net. URL; import Java. util. arraylist; import Java. util. list; import Org. apache. HTTP. httpentity; import Org. apache. HTTP. httpresponse; 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. httpget; import Org. apache. HTTP. client. methods. httppost; import Org. apache. HTTP. entity. fileentity; import Org. apache. HTTP. impl. client. defaulthttpclient; import Org. apache. HTTP. message. basicnamevaluepair; import Org. apache. HTTP. params. httpparams; import Org. apache. HTTP. Util. entityutils; import Org. JSON. jsonexception; import android. graphics. bitmap; import android. graphics. bitmapfactory; import android. util. log; import COM. leopard. health. model. constants; import COM. leopard. health. model. response. baseresponse; import COM. leopard. health. service. impl. userserviceimpl;/***** HTTP tool ** @ author wyyl1 ** @ date 2012-9-13 */public class httputil {Private Static final string cod Ing_utf_8 = "UTF-8"; public static baseresponse sendpost (string URL) throws clientprotocolexception, ioexception, jsonexception {// httppost connection object httppost httprequest = new httppost (URL ); // obtain the default httpclienthttpclient httpclient = new defaulthttpclient (); // obtain httpresponsehttpresponse httpresponse = httpclient.exe cute (httprequest); If (httpresponse. getentity ()! = NULL) {// obtain the returned string strresult = entityutils. tostring (httpresponse. getentity (); baseresponse respones = new baseresponse (strresult); respones. sethttpcode (httpresponse. getstatusline (). getstatuscode (); Return respones;} else {return NULL;} public static baseresponse sendpost (string URL, list <namevaluepair> Params) throws clientprotocolexception, ioexception, jsonexception {// httppost connection object httppost Httprequest = new httppost (URL); // Add the parameter to be passed // set the character set httpentity = new urlencodedformentity (Params, coding_utf_8); // request httprequesthttprequest. setentity (httpentity); // get the default response httpclient = new defaulthttpclient (); // get httpresponsehttpresponse httpresponse = httpclient.exe cute (httprequest); If (httpresponse. getentity ()! = NULL) {// obtain the returned string strresult = entityutils. tostring (httpresponse. getentity (); log. D ("statuscode", "" + httpresponse. getstatusline (). getstatuscode (); log. D ("returned string", strresult); baseresponse respones = new baseresponse (strresult); respones. sethttpcode (httpresponse. getstatusline (). getstatuscode (); Return respones;} else {return NULL;} public static baseresponse sendpost (string URL, httpparams Pa Rams, file, string contenttype) throws clientprotocolexception, ioexception, jsonexception {// httppost connection object httppost httprequest = new httppost (URL ); // Add the parameter to be passed /// set the character set list <namevaluepair> paramshttpentity = new arraylist <namevaluepair> (); paramshttpentity. add (New basicnamevaluepair (constants. syn_sid, userserviceimpl. logineduser. getsessionid (); paramshttpentity. add (New basicnamevaluepair ("app_ I D ", constants. app_id); // httpentity = new urlencodedformentity (paramshttpentity, // coding_utf_8); // request httprequest // httprequest. setentity (httpentity); fileentity Fe = new fileentity (file, contenttype); httprequest. setentity (FE); // get the default response httpclient = new defaulthttpclient (); // get httpresponse "httpresponse = httpclient.exe cute (httprequest); If (httpresponse. Getentity ()! = NULL) {// obtain the returned string strresult = entityutils. tostring (httpresponse. getentity (); log. D ("statuscode", "" + httpresponse. getstatusline (). getstatuscode (); log. D ("returned string", strresult); baseresponse respones = new baseresponse (strresult); respones. sethttpcode (httpresponse. getstatusline (). getstatuscode (); Return respones;} else {return NULL;}/*** Upload File ** @ Param actionurl upload address * @ Param name the field name of the file received by the server * @ Param uploadfile address * @ Param newname the name you want to save on the server * @ return */public static string uploadfile (string actionurl, string name, string uploadfile, string newname) {string end = "\ r \ n"; string twohyphens = "--"; string boundary = "*****"; dataoutputstream DS = NULL; stringbuffer B = new stringbuffer (); try {URL url = new URL (actionurl); httpurlconnection con = (httpurlconnection) URL. openconnection ();/* Allow input and output without using cache */con. setdoinput (true); con. setdooutput (true); con. setusecaches (false);/* set the transfer method = post */con. setrequestmethod ("Post");/* setrequestproperty */con. setrequestproperty ("connection", "keep-alive"); con. setrequestproperty ("charset", "UTF-8"); con. setrequestproperty ("Content-Type", "multipart/form-data; boundary =" + boundary);/* Set dataoutputstream */DS = new dataoutputstream (con. g Etoutputstream (); DS. writebytes (twohyphens + boundary + end); DS. writebytes ("content-Disposition: Form-data;" + "name = \" IMG \ "; filename = \" "+ newname +" \ "" + end); DS. writebytes (end);/* Get the fileinputstream */fileinputstream fstream = new fileinputstream (uploadfile);/* Set 1024 bytes */INT buffersize = 1024 each write; byte [] buffer = new byte [buffersize]; int length =-1;/* read data from the file to the buffer */while (length = fstre Am. Read (buffer ))! =-1) {/* write data to dataoutputstream */Ds. write (buffer, 0, length);} Ds. writebytes (end); DS. writebytes (twohyphens + boundary + twohyphens + end);/* close streams */fstream. close (); DS. flush ();/* Get Response content */inputstream is = con. getinputstream (); int ch; while (CH = is. read ())! =-1) {B. append (char) CH);} log. D ("res", B. tostring ();} catch (exception e) {e. printstacktrace ();} finally {try {// close dataoutputstreamds. close ();} catch (ioexception e) {e. printstacktrace () ;}} return B. tostring ();}/*** download image * @ Param URL * @ return */public static bitmap downloadimage (string URL) {httpclient = new defaulthttpclient (); try {httpget request = new httpget (URL); log. D ("downloadimgurl", "[] [] [] [] [] [] [] =" + URL); httpresponse response = httpclient.exe cute (request ); byte [] image = entityutils. tobytearray (response. getentity (); bitmap mbitmap = bitmapfactory. decodebytearray (image, 0, image. length); Return mbitmap;} catch (ioexception e) {// covers: // clientprotocolexception // connecttimeoutexception // connectionpooltimeoutexception // sockettimeoutexceptione. printstacktrace ();} return NULL ;}}

References:

File Upload method: Google Android SDK development example

Image download method: proficient in android3