如何在android中下载web缓冲区？

我正在开发galaxy note 10.1

下载动作启动java spring动作 .

这个下载动作很好地在PC，移动设备中的浏览器中进行

问题是galaxy note 10.1内置浏览器

这个浏览器的userAgent是

“Mozilla / 5.0（Linux; U; Android 4.0.4; ko-kr; SHW-M480W Build / IMM76D）AppleWebKit / 534.30（KHTML，与Gecko一样）Version / 4.0 Safari / 534.30”

和android的下载方法是

mWebView.setDownloadListener（new DownloadListener（）{public void onDownloadStart（String url，String sUserAgent，String contentDisposition，String mimetype，long contentLength）{URL urls = null; String fileUrl =“”; String mPath =“”; Log.v（ “sUserAgent”，sUserAgent）;

String condition[] = contentDisposition.split("=");
            String x = condition[1];
            Log.d("test",x);
            try {
                fileUrl = URLDecoder.decode(x, "UTF-8");
            } catch(Exception e) {
                e.printStackTrace();
            }
            try {
                urls = new URL(url);
            } catch (MalformedURLException e) {
                e.printStackTrace();
            }
            String fileName[] = url.split("/");
            Log.d("test", url);
            try {
                HttpURLConnection conn= (HttpURLConnection)urls.openConnection();
                conn.setDoOutput(true);
                conn.connect();
                mPath = Environment.getExternalStorageDirectory()+"/Download/";

                String chkPath = Environment.getExternalStorageDirectory()+"/Download/"+fileUrl;
                File chkFile = new File(chkPath);
                if(chkFile.exists() == true){}
                else {
                    File f = new File(mPath);
                    f.mkdirs();
                    File OutputFile = new File(f, fileUrl);
                    FileOutputStream fos = new FileOutputStream(OutputFile);
                    InputStream is = conn.getInputStream();
                    byte[]buffer = new byte[24576];
                    int len1 = 0;

                    while((len1 = is.read(buffer)) != -1) {
                        fos.write(buffer, 0, len1);
                    }
                    fos.close();
                    is.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
            Toast.makeText(getApplicationContext(), "DOWNLOAD COMPLETED", 0).show();
            File files = new File(mPath+fileUrl);
            Log.e("msg",mPath+fileUrl+"");
            Intent intent = new Intent(Intent.ACTION_VIEW);
            String mimes = fileUrl.substring(fileUrl.length()-3, fileUrl.length());
            if(mimes.equals("hwp")) {
                intent.setDataAndType(Uri.fromFile(files), "application/x-hwp");
            } else {
                intent.setDataAndType(Uri.fromFile(files), "application/"+mimes);
            }
            startActivity(intent);
        }   
    });

Spring 天的下载动作是

String mimetype =“application / x-msdownload”;

response.setContentType(mimetype);
                response.setHeader("fileName", fvo.getFileStreCours()+fvo.getStreFileNm());
                setDisposition(fvo.getOrignlFileNm(), request, response);
                response.setContentLength(fSize);

                BufferedInputStream in = null;
                BufferedOutputStream out = null;

                try {
                    in = new BufferedInputStream(new FileInputStream(uFile));
                    out = new BufferedOutputStream(response.getOutputStream());

                    FileCopyUtils.copy(in, out);
                    out.flush();
                    response.flushBuffer();
                } catch (Exception ex) {
                    // Connection reset by peer: socket write error
                    log.debug("IGNORED: " + ex.getMessage());
                } finally {
                    if (in != null) {
                        try {
                            in.close();
                        } catch (Exception ignore) {
                            log.debug("IGNORED: " + ignore.getMessage());
                        }
                    }
                    if (out != null) {
                        try {
                            out.close();
                        } catch (Exception ignore) {
                            log.debug("IGNORED: " + ignore.getMessage());
                        }
                    }
                }

此文件正在从NAS下载

但是android没有访问web的响应缓冲区

在android中，maked 0字节文件 .

如何在web的响应缓冲区中访问缓冲区和下载文件？

PS . Web服务不允许打开url，所以我不能使用重定向