Android webview 下载数据/文本文件

Question

我开发了一个 android webview 并尝试在单击 webview 中的链接时下载生成的数据:文本文件。

    webView.setDownloadListener(new DownloadListener() {
        @Override
        public void onDownloadStart(String url, String userAgent, String contentDisposition, String mimeType, long contentLength) {
            DownloadManager.Request request = new DownloadManager.Request(
                    Uri.parse(url));
            request.allowScanningByMediaScanner();
            request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
            request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, "download");
            DownloadManager dm = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
            dm.enqueue(request);
        }
    });

但是，我收到以下错误异常:

java.lang.IllegalArgumentException: Can only download HTTP/HTTPS URIs: data:text/vcard;base64,qadsasffaefqawdfafafasdasdasdasdadasd

有什么解决办法吗？提前致谢。

Answer 1

mWebView.setDownloadListener(new DownloadListener() {       

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

            request.allowScanningByMediaScanner();
            request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED); //Notify client once download is completed!
            request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, "Name of your downloadble file goes here, example: Mathematics II ");
            DownloadManager dm = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
            dm.enqueue(request);
            Intent intent = new Intent(Intent.ACTION_OPEN_DOCUMENT); //This is important!
            intent.addCategory(Intent.CATEGORY_OPENABLE); //CATEGORY.OPENABLE
            intent.setType("*/*");//any application,any extension
            Toast.makeText(getApplicationContext(), "Downloading File", //To notify the Client that the file is being downloaded
                    Toast.LENGTH_LONG).show();

        }
    });

不要忘记授予此权限!这个非常重要!将此添加到您的 list 文件中(AndroidManifest.xml 文件)
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
希望这可以帮助。干杯:)