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Editorial Team
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Asked: 2026-06-08T16:59:52+00:00

While testing appcache issues for an offline WebApp I stumbled over a problem with

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While testing appcache issues for an offline WebApp I stumbled over a problem with the emulator:
I tried to load a webpage in the WebView. Sometimes it shows perfectly, sometimes it shows nothing.
First I thought it was my fault – overseeing some buggy code i inserted while testing. But that’s not the case.
Instead I believe it’s a bug (or a misconfiguration) of the emulator itself. Because if I call

    myWebView.loadData("<html><body><h1>TEST</h1></body></html>", "text/html", "UTF-8");

and then 

    myWebView.loadUrl("http://10.0.2.2:8080/FrontEnd/index.jsp");

the view shows an heading “TEST”, instead the content of the index.jsp. So I added to the index:

    $(alert("Hallo Welt!"));

And now, it shows my expected toast “Hallo Welt!” -> Page was received and somehow processed.
BUT: the display shows not my index.jsp – instead the TEST resides.

Additionally i observed that app-symbols in “All Apps Menu” got cut in half and the lowest row wasn’t shown, too. Perhaps it’s a incompatibility with graphics driver or similarly!?

Is anybody aware of that problem or can give me a hint how to fix that?

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1 Answer

  1. Editorial Team

    And the problem was: reacting on JS-alerts with an Toast:

        myWebView.setWebChromeClient(new WebChromeClient() {
        @Override
        public boolean onJsAlert(WebView view, String url, String message, JsResult result) {
            Logger.getLogger("js-console").log(Level.INFO, "received js-alert!");
            Toast toast = Toast.makeText(view.getContext(), message, Toast.LENGTH_LONG);
            toast.setGravity(Gravity.CENTER, 0, 0);
            toast.show();
            return true;
        }
    });

    but NOT calling 

        JsResult.confirm();

    After adding this line after toast.show(); and before return true; all works like expected… … … …

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