android - Select multiple images from the sdcard and upload them to a server -

my code:

protected string doinbackground(httpresponse... arg0) {     string result = "";              file file = new file(selectimages);     try {         httpclient client = new defaulthttpclient();         string posturl = "http://192.168.1.11/api/review/add_image.php?";         post = new httppost(posturl);          filebody bin = new filebody(file);         totalsize = bin.getcontentlength();         multipartentity reqentity = new multipartentity(httpmultipartmode.browser_compatible, new progresslistener()         {             public void transferred(long num)             {                 publishprogress((int) ((num / (float) totalsize) * 100));             }         });          reqentity.addpart("userfile", bin);         post.setentity(reqentity);          httpresponse response = client.execute(post);         httpentity resentity = response.getentity();           if (resentity != null) {                 result = entityutils.tostring(resentity);         }     } catch (exception e) {         e.printstacktrace();     }     return result; } 

my result null.

this nice way convert image base64. can send more images in easy way.

imageview.builddrawingcache(); bitmap bm = imageview.getdrawingcache(); bytearrayoutputstream baos = new bytearrayoutputstream();   bm.compress(bitmap.compressformat.jpeg, 100, baos); //bm bitmap object    byte[] b = baos.tobytearray();  string encodedimage = base64.encodetostring(b , base64.default); 

if have 5 images can add them array , send server.