[Android]웹뷰에서 다운로드 관리자 실행하기

    wv.setDownloadListener(new DownloadListener() 
        {
            @Override
            public void onDownloadStart(String url, String userAgent, String contentDisposition, String mimetype, long contentLength)
            {
                try {
                    contentDisposition = URLDecoder.decode(contentDisposition,"UTF-8"); //디코딩

                    String FileName = contentDisposition.replace("attachment; filename=", "");
                    String fileName = FileName.substring(1, FileName.length()-1);//양쪽에 따옴표가 있어서 제거해줌

                    DownloadManager.Request request = new DownloadManager.Request(Uri.parse(url));
                    request.setMimeType(mimetype);
                    String cookies = CookieManager.getInstance().getCookie(url);

                    request.addRequestHeader("cookie", cookies);
                    request.addRequestHeader("User-Agent", userAgent);
                    request.setDescription("Downloading file");
                    //request.setTitle(URLUtil.guessFileName(url, contentDisposition, mimetype));
                    request.setTitle(fileName);
                    request.allowScanningByMediaScanner();

                    request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
                    request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, URLUtil.guessFileName(url, contentDisposition, mimetype));

                    DownloadManager dm = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
                    dm.enqueue(request);
                    Toast.makeText(getApplicationContext(),getString(R.string.file_downloading), Toast.LENGTH_LONG).show();
                }
                catch (Exception e) {
                    if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
                        if (ActivityCompat.shouldShowRequestPermissionRationale(MainActivity.this, Manifest.permission.WRITE_EXTERNAL_STORAGE)) {
                            Toast.makeText(getBaseContext(), getString(R.string.file_permission), Toast.LENGTH_LONG).show();
                            ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, 1004);
                        }
                        else {
                            Toast.makeText(getBaseContext(), getString(R.string.file_permission), Toast.LENGTH_LONG).show();
                            ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, 1004);
                        }
                    }
                }
            }
        });