Display Image in android Imageview using Asynctask -

i have image being sent me through json string. want convert string image in android app , display image in imageview.i have problem, using asynctask , code in doinbackground method:

protected boolean doinbackground(final string... args){          jsonparser jsonparser = new jsonparser();         jsonarray json = jsonparser.getjsonfromurl(url);         if(json!=null){             (int = 0; < json.length(); i++){                 try{                     jsonobject c = json.getjsonobject(i);                     string displayimagefromurl = c.getstring(imageurl);                     string clearurl = displayimagefromurl.substring(displayimagefromurl.indexof(",")+1);                     byte[] decodingstring = base64.decode(clearurl, base64.default);                     bitmap = bitmapfactory.decodebytearray(decodingstring, 0 , decodingstring.length);                      string showcreateddate = c.getstring(createddate);                     string showarticletitle = c.getstring(articletitle);                     hashmap<string, string> map = new hashmap<string, string>();                      map.put(createddate, showcreateddate);                     map.put(articletitle, showarticletitle);                      jsonlist.add(map);                  }catch (exception e){                     e.printstacktrace();                 }             }         }else{          }         return null;     } 

and code in onpostexecute() method:

        protected void onpostexecute(final boolean success){         if (dialog.isshowing()) {             dialog.dismiss();         }         log.d("image please",bitmap.tostring());         imageview showimage = (imageview) findviewbyid(r.id.imageshow);         showimage.setimagebitmap(bitmap);         listadapter adapter = new simpleadapter(context, jsonlist, r.layout.activity_news,                 new string[] {createddate, articletitle},                 new int[] { r.id.createdate, r.id.articletitle});         setlistadapter(adapter);          lv = getlistview();     } 

unfortunately nothings shows in logcat. can me? miss??

here pseudocode. if use in project should working.

//my image (android logo) private string base64 = "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";  //somewhere in code imageview = (imageview) view.findviewbyid(r.id.imageview);//layout params wrap , wrap  //weak reference safe using imageview when app i.e exit , task still running weakreferenceimageview = new weakreference<imageview>(imageview);  new asynctask<void, void, bitmap>() {     @override     protected bitmap doinbackground(void... params) {          byte[] encode = base64.decode(base64.getbytes(), 0);         bitmap bitmap = bitmapfactory.decodebytearray(encode, 0, encode.length);         return bitmap;     }      @override     protected void onpostexecute(bitmap bitmap) {         super.onpostexecute(bitmap);          if (bitmap != null) {                                                   if (weakreferenceimageview != null) {                                   imageview weak = weakreferenceimageview.get();                 if (weak != null) {                                                weak.setimagebitmap(bitmap);                               }                                                               }                                                               }                                                                } }.execute(); 

if decoding wrong, returned bitmap null. please try image (it small) if works. if works means wrong based64 image.

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fixed example, added weakreference sample of coding.