Android show progress bar while image loading dynamically -

in 1 of project, loading images dynamic url. need show loading dialogue still images loads. loading images using async task. new android. please 1 give me little

my code looks like.

tablelayout table = (tablelayout)findviewbyid(r.id.tablelayout_1);         for(integer i=0;i<2;i++){               tablerow rowp = new tablerow(this);             rowp.setbackgroundcolor(color.parsecolor("#fff000"));                 imageview image = new imageview(this);             string ed="http://www.domain.com/image.jpg";             image.settag(ed);             downloadimagestask td=new downloadimagestask();             td.execute(image);              rowp.addview(image);             table.addview(rowp);             }         }   private class downloadimagestask extends asynctask<imageview, void, bitmap> {      imageview imageview = null;      @override     protected bitmap doinbackground(imageview... imageviews) {         this.imageview = imageviews[0];         return download_image((string)imageview.gettag());     }      @override     protected void onpostexecute(bitmap result) {         imageview.setimagebitmap(result);     }      private bitmap download_image(string url) {          bitmap bmp =null;         try{             url ulrn = new url(url);             httpurlconnection con = (httpurlconnection)ulrn.openconnection();             inputstream = con.getinputstream();             bmp = bitmapfactory.decodestream(is);             if (null != bmp)                 return bmp;              }catch(exception e){}         return bmp;     } } 

thanks in advance

edit

private class downloadimagestask extends asynctask<imageview, void, bitmap> {          imageview imageview = null;         progressdialog dialog;         context context;          public downloadimagestask(context context) {             this.context = context;         }          @override         protected bitmap doinbackground(imageview... imageviews) {             this.imageview = imageviews[0];             return download_image((string)imageview.gettag());         }          @override         protected void onpostexecute(bitmap result) {             imageview.setimagebitmap(result);             if (dialog != null)                 dialog.dismiss();         }          @override         protected void onpreexecute() {             super.onpreexecute();             dialog = progressdialog.show(context, "title","message");         }          private bitmap download_image(string url) {              bitmap bmp =null;             try{                 url ulrn = new url(url);                 httpurlconnection con = (httpurlconnection)ulrn.openconnection();                 inputstream = con.getinputstream();                 bmp = bitmapfactory.decodestream(is);                 if (null != bmp)                     return bmp;                  }catch(exception e){}             return bmp;         }     } 

add below lines in downloadimagetask.

@override protected void onpreexecute() {     super.onpreexecute();     dialog = progressdialog.show(context, "title",                 "message"); }  @override protected void onpostexecute(void result) {     super.onpostexecute(result);      if (dialog != null)         dialog.dismiss();     //rest of code } 

and declare progressdialog dialog in downloadimagetask.

to pass context, need create contructor that.

private class downloadimagestask extends asynctask<imageview, void, bitmap> {      imageview imageview = null;     progressdialog dialog;     context context;      public downloadimagestask(context context) {         this.context = context;     }     //... rest of code .... }