Webview Download listener never calls

Question

Download listener never calls and I am also not getting dynamic download link.

I have one website that contain Download button, while clicking on button it generates download link for document, while I click on download button it will successfully downloads documents via chrome browser directly but using web view it is not automatically downloads documents as well not getting any call of listener.

webView.loadUrl(WEBSITELINK);

webView.setWebViewClient(new WebViewClient() {

        @Override
        public boolean shouldOverrideUrlLoading(WebView view, WebResourceRequest request) {
            Log.v("Url:","shouldOverrideUrlLoading");
            return true;
        }

        @Override
        public void onPageFinished(WebView view, String url) {

            // download link generates dynamically by clicking on button

            webView.loadUrl("javascript:(function(){document.getElementById('download').click();})()");

        }



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.setMimeType(mimeType);
            //------------------------COOKIE!!------------------------
            String cookies = CookieManager.getInstance().getCookie(url);
            request.addRequestHeader("cookie", cookies);
            //------------------------COOKIE!!------------------------
            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);
            request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, URLUtil.guessFileName(url, contentDisposition, mimeType));
            DownloadManager dm = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
            dm.enqueue(request);
            Toast.makeText(getApplicationContext(), "Downloading File", Toast.LENGTH_LONG).show();
        }
    });

refert this answer https://stackoverflow.com/a/65684942/8258305 — Mohd Qasim, Jan 12 '21 at 13:30

score 0 · Answer 1 · answered Jun 17 '17 at 09:23

0

setDownloadListener sets the listener when the WebView doesn't think the content can be handled by the rendering engine

for more information follow this link setDownloadListener

or this link

answered Jun 17 '17 at 09:23

AskNilesh

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1

Is there any way to force fully call listener? – Nik Jun 17 '17 at 09:29

score 0 · Answer 2 · answered Jun 20 '17 at 15:15

Inside oncreate method write this code

    webView = (WebView) findViewById(R.id.webView);
    WebSettings webSettings = webView.getSettings();
    webSettings.setJavaScriptEnabled(true);
    webView.loadUrl("place your link here");
    webView.setWebViewClient(new WebViewClient());

    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); //Notify client once download is completed!

            DownloadManager dm = (DownloadManager) getSystemService(DOWNLOAD_SERVICE);
            dm.enqueue(request);
            Toast.makeText(getApplicationContext(), "Downloading File", //To notify the Client that the file is being downloaded
                    Toast.LENGTH_LONG).show();

        }
    });

}

score 0 · Answer 3 · answered Dec 20 '18 at 14:16

Ensure that：

<uses-permission android:name="android.permission.INTERNET"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
if(ContextCompat.checkSelfPermission(this,
            Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED) {...

Webview Download listener never calls

3 Answers3