Android异步请求网络上的图片，返回数据为数据流，,private clas

Android异步请求网络上的图片，返回数据为数据流，,private clas

private class ErweimaAsyncTask extends AsyncTask<String, Integer, String>{        @Override        protected String doInBackground(String... paramArray) {            URL picUrl;            try {                picUrl = new URL(Constant.ERWEIMA_URL + "?timestimp=" + new Date().getTime() + "&amp;code=BILLID_" + globalVariables.getCurrentBillId());                pngBM = BitmapFactory.decodeStream(picUrl.openStream());              } catch (MalformedURLException e) {                // TODO Auto-generated catch block                e.printStackTrace();            } catch (IOException e) {                // TODO Auto-generated catch block                e.printStackTrace();            }             return "";        }        @Override        protected void onPostExecute(String result) {            erweimaImg.setImageBitmap(pngBM);         }    }