Php uploading image to server in android -

im using php script allows choose image gallery , upload online web hosting service. image gets uploaded, .jpg file uploaded empty , named 0.jpg , size shown 0 bytes. when try open image shows

"the image http://testimage.site88.net/pic/0.jpg cannot displayed because contains errors"

what possible reason this? php code follows

 <?php     $name = $_post['name']; //image name     $image = $_post['image']; //image in string format      //decode image     $decodedimage = base64_decode($image);      //upload image     file_put_contents("pic/".$name.".jpg", $decodedimage); 

the android code is:

import android.app.activity; import android.content.intent; import android.graphics.bitmap; import android.graphics.drawable.bitmapdrawable; import android.net.uri; import android.os.asynctask; import android.os.bundle; import android.provider.mediastore; import android.util.base64; import android.util.log; import android.view.view; import android.widget.button; import android.widget.imageview; import android.widget.toast;  import java.io.bytearrayoutputstream; import java.io.unsupportedencodingexception; import java.net.urlencoder; import java.util.hashmap; import java.util.map;   public class mainactivity extends activity {     //define global views variable     public imageview imageview;     public button   selectimage,                     uploadimage;     public string server = "http://testimage.site88.net/saveimage.php",                     timestamp;      private static final string tag = mainactivity.class.getsimplename();      private static final int result_select_image = 1;      @override     protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.activity_main);          //instantiate view         imageview = (imageview) findviewbyid(r.id.imageview);         selectimage = (button) findviewbyid(r.id.selectimage);         uploadimage = (button) findviewbyid(r.id.uploadimage);          //when selectimage button pressed         selectimage.setonclicklistener(new view.onclicklistener() {             @override             public void onclick(view v) {                 //call function select image album                 selectimage();             }         });          //when uploadimage button pressed         uploadimage.setonclicklistener(new view.onclicklistener() {             @override             public void onclick(view v) {                 //get image in bitmap format                 bitmap image = ((bitmapdrawable) imageview.getdrawable()).getbitmap();                 //execute async task , upload image server                 new upload(image,"img_"+timestamp).execute();             }         });      }      //function select image     private void selectimage(){         //open album select image         intent gallaryintent = new intent(intent.action_pick,mediastore.images.media.external_content_uri);         startactivityforresult(gallaryintent, result_select_image);     }      /*     * function called when pick image album     * */     @override     protected void onactivityresult(int requestcode, int resultcode, intent data) {         super.onactivityresult(requestcode, resultcode, data);          if (requestcode == result_select_image && resultcode == result_ok && data != null){             //set selected image image variable             uri image = data.getdata();             imageview.setimageuri(image);              //get current timestamp , strore in time variable             long tslong = system.currenttimemillis() / 1000;             timestamp = tslong.tostring();              toast.maketext(getapplicationcontext(),timestamp,toast.length_short).show();         }     }      private string hashmaptourl(hashmap<string, string> params) throws unsupportedencodingexception {         stringbuilder result = new stringbuilder();         boolean first = true;         for(map.entry<string, string> entry : params.entryset()){             if (first)                 first = false;             else                 result.append("&");              result.append(urlencoder.encode(entry.getkey(), "utf-8"));             result.append("=");             result.append(urlencoder.encode(entry.getvalue(), "utf-8"));         }          return result.tostring();     }       //async task upload image     private class upload extends asynctask<void,void,string>{         private bitmap image;         private string name;          public upload(bitmap image,string name){             this.image = image;             this.name = name;         }          @override         protected string doinbackground(void... params) {             bytearrayoutputstream bytearrayoutputstream = new bytearrayoutputstream();             //compress image jpg format             image.compress(bitmap.compressformat.jpeg,100,bytearrayoutputstream);             /*             * encode image base64 can picked saveimage.php file             * */             string encodeimage = base64.encodetostring(bytearrayoutputstream.tobytearray(),base64.default);              //generate hashmap store encodedimage , name             hashmap<string,string> detail = new hashmap<>();             detail.put("name", name);             detail.put("image", encodeimage);              try{                 //convert hashmap encodedurl send php file                 string datatosend = hashmaptourl(detail);                 //make http request , send data saveimage.php file                 string response = request.post(server,datatosend);                  //return response                 return response;              }catch (exception e){                 e.printstacktrace();                 log.e(tag,"error  "+e);                 return null;             }         }            @override         protected void onpostexecute(string s) {             //show image uploaded             toast.maketext(getapplicationcontext(),"image uploaded",toast.length_short).show();         }     } } 

thanks in advance.

i think have fix php file. edited in question, didn't make sense. use what's there now.

if need more help, please give output of

error_log(print_r($_post, 1)); 

from php logs.