AndroidWebView中使用DownloadManager无法下载Excel文件
- 添加WRITE_EXTERNAL_STORAGE权限到AndroidManifest文件中。
- 在WebViewClient的shouldOverrideUrlLoading方法中判断Excel文件的MIME Type并使用Download Manager下载。
webView.setDownloadListener(new DownloadListener() { @Override public void onDownloadStart(String url, String userAgent, String contentDisposition, String mimeType, long contentLength) { if(mimeType.equals("application/vnd.ms-excel")) { DownloadManager.Request request = new DownloadManager.Request(Uri.parse(url)); request.setMimeType(mimeType); String cookies = CookieManager.getInstance().getCookie(url); if(cookies != null) { request.addRequestHeader("cookie", cookies); } request.addRequestHeader("User-Agent", userAgent); request.setDescription("Excel文件正在下载"); request.setTitle(URLUtil.guessFileName(url, contentDisposition, mimeType)); 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(), "Excel文件开始下载", Toast.LENGTH_LONG).show(); } else { webView.loadUrl(url); } } });
- 在AndroidManifest文件中添加FileProvider。
- 新建xml文件provider_paths.xml，添加如下内容：
- 使用FileProvider生成Excel文件的Uri。
String authorities = getApplicationContext().getPackageName() + ".provider"; File file = new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS), fileName); Uri uri = FileProvider.getUriForFile(getApplicationContext(), authorities