window.beforeunload called before WebViewClient.shouldOverrideUrlLoading

Question

In the Android app with the WebView and WebViewClient configured, after the window.open(url, '_system') called from the js, the js event window.beforeunload is fired before the Android WebViewClient.shouldOverrideUrlLoading is called. Is this a proper and intended behavior? Is there a way to intercept the url open without the window.beforeunload event fired?

To stop the `window.beforeunload` from being fired what you have tried?? — chirag soni, May 09 '20 at 07:14
@chiragsoni I have presumed that using WebViewClient.shouldOverrideUrlLoading would cancel any further js events related to the window.open, was I wrong? — Maksym Gontar, May 09 '20 at 14:46

Taher Fattahi · Answer 1 · 2020-05-10T04:30:29.780

see this example code, maybe help you:

    final WebView webView = (WebView)findViewById(R.id.webview);

    // Enable javascript
    webView.getSettings().setJavaScriptEnabled(true);

    webView.setWebViewClient(new WebViewClient() {

        @SuppressWarnings("deprecation")
        @Override
        public boolean shouldOverrideUrlLoading(WebView view, String url) {
            final Uri uri = Uri.parse(url);
            return customUriHanlder(uri);
        }

        @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
        @Override
        public boolean shouldOverrideUrlLoading(WebView view, WebResourceRequest request) {
            final Uri uri = request.getUrl();
            return customUriHanlder(uri);
        }

        private boolean customUriHanlder(final Uri uri) {
            Log.i(TAG, "Uri =" + uri);
            final String host = uri.getHost();
            final String scheme = uri.getScheme();
            // you can set your specific condition
            if (true) {
                // Returning false means that you are going to load this url in the webView itself
                return false;
            } else {
                // Returning true means that you need to handle what to do with the url
                // open web page in a Browser
                final Intent intent = new Intent(Intent.ACTION_VIEW, uri);
                startActivity(intent);
                return true;
            }
        }

    });

    // Load the webpage
    webView.loadUrl("https://google.com/");

with customUriHanlder function you can load your url in vebview itself or in browser.
on google documentation shouldOverrideUrlLoading: If a WebViewClient is provided, returning true causes the current WebView to abort loading the URL, while returning false causes the WebView to continue loading the URL as usual.

window.beforeunload called before WebViewClient.shouldOverrideUrlLoading

1 Answers1