Android Webview下载启用码问题

我正在尝试在我的应用程序上启用下载。问题是有3个webview页面。我只能把下载代码放在其中一个。如果我同时向其他人解释，只会出现大量错误。有人知道怎么做吗？跟我解释一下？谢谢 代码是：

public void onDownloadStart(String url, String userAgent, String contentDisposition, String mimetype, long contentLength) {
DownloadManager.Request request = new DownloadManager.Request(Uri.parse(url));
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.allowScanningByMediaScanner(); request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);```

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您还可以共享错误日志吗？