java - Image Loader "SkImageDecoder::Factory returned null" -

i pass view imageview imageloader class have created, reason getting error "skimagedecoder::factory returned null" seems happen images, url's should fine with. load 3 out of list of ten. wondering if task wasn't thread safe or else may have missed. take below

imageloader:

public class imageloader {      memorycache memorycache = new memorycache();     filecache filecache;     private map<imageview, string> imageviews = collections             .synchronizedmap(new weakhashmap<imageview, string>());     executorservice executorservice;      public imageloader(context context) {         filecache = new filecache(context);         executorservice = executors.newfixedthreadpool(5);     }      final int stub_id = r.drawable.failed_load;      public void displayimage(string url, imageview imageview) {         system.out.println(url);          imageviews.put(imageview, url);         bitmap bitmap = memorycache.get(url);         if (bitmap != null) {             imageview.setimagebitmap(bitmap);         } else {             queuephoto(url, imageview);             imageview.setimageresource(stub_id);         }      }      private void queuephoto(string url, imageview imageview) {         phototoload p = new phototoload(url, imageview);         executorservice.submit(new photosloader(p));     }      private bitmap getbitmap(string url) {         file f = filecache.getfile(url);          // sd cache         bitmap b = decodefile(f);         if (b != null) {             return b;         }          // web         try {             bitmap bitmap = null;             url imageurl = new url(url);             httpurlconnection conn = (httpurlconnection) imageurl                     .openconnection();             conn.setconnecttimeout(3000);             conn.setreadtimeout(3000);             conn.setinstancefollowredirects(true);             inputstream = conn.getinputstream();             outputstream os = new fileoutputstream(f);             ioutils.copy(is, os);// util.copystream(is, os); //todo delete             os.close();             bitmap = decodefile(f);             return bitmap;         } catch (exception ex) {             ex.printstacktrace();             return null;         }     }      // decodes image , scales reduce memory consumption     private bitmap decodefile(file f) {         try {             // decode image size             bitmapfactory.options o = new bitmapfactory.options();             o.injustdecodebounds = true;             bitmapfactory.decodestream(new fileinputstream(f), null, o);              // find correct scale value. should power of 2.             // todo can change image content here.             final int required_size = 512;             int width_tmp = o.outwidth, height_tmp = o.outheight;             int scale = 1;             while (true) {                 if (width_tmp / 2 < required_size                         || height_tmp / 2 < required_size)                     break;                 width_tmp /= 2;                 height_tmp /= 2;                 scale *= 2;             }              // decode insamplesize             bitmapfactory.options o2 = new bitmapfactory.options();             o2.insamplesize = scale;             return bitmapfactory.decodestream(new fileinputstream(f), null, o2);         } catch (filenotfoundexception e) {         }         return null;     }      // task queue     private class phototoload {         public string url;         public imageview imageview;          public phototoload(string u, imageview i) {             url = u;             imageview = i;         }     }      class photosloader implements runnable {         phototoload phototoload;          photosloader(phototoload phototoload) {             this.phototoload = phototoload;         }          @override         public void run() {             if (imageviewreused(phototoload)) {                 return;             }             bitmap bmp = getbitmap(phototoload.url);             memorycache.put(phototoload.url, bmp);             if (imageviewreused(phototoload)) {                 return;             }             bitmapdisplayer bd = new bitmapdisplayer(bmp, phototoload);             activity = (activity) phototoload.imageview.getcontext();             a.runonuithread(bd);         }     }      boolean imageviewreused(phototoload phototoload) {         string tag = imageviews.get(phototoload.imageview);         if (tag == null || !tag.equals(phototoload.url)) {             return true;         }         return false;     }      // used display bitmap in ui thread     class bitmapdisplayer implements runnable {         bitmap bitmap;         phototoload phototoload;          public bitmapdisplayer(bitmap b, phototoload p) {             bitmap = b;             phototoload = p;         }          public void run() {             if (imageviewreused(phototoload)) {                 return;             }             if (bitmap != null) {                 phototoload.imageview.setimagebitmap(bitmap);             } else {                 phototoload.imageview.setimageresource(stub_id);             }         }     }      public void clearcache() {         memorycache.clear();         filecache.clear();     }  } 

unfortunately solution double checking incoming url's, wrong, , seems fine now. else having similar problem, double check loading, , files coming in, wherever trying load them.