WebView works on android 2.3.3, shows blank page on 4.0.1

Question

I don't think this is a duplicate, but this question may be relevant.

As of title: this works perfectly on android 2.3.3, randomly shows a blank page on 4.0.1. It usually works at first, then start displaying blank pages until the application is reinstalled.

The code I'm using to display a simple (html only) webpage is a follows:

@Override
public void afterTextChanged(final Editable arg0){
    final String result = getResult();
    final String base64 = encode(result);
    //This is the WebView
    results.loadData(base64, "text/html; charset=utf-8", "base64");
}

private String encode(final String value){
    try{
        final byte[] bytes = value.getBytes("UTF-8");
        final String base64 = Base64.encodeToString(bytes,
                              android.util.Base64.DEFAULT);
        return base64;
    }
    catch(UnsupportedEncodingException e){
        return "YOULOOZE";
    }
}

you finally solved it? Great! And thanks for the bounty. Maybe you could update your question with the solution — Maragues, Dec 21 '12 at 11:14
No, I didn't solve it, but I awarded you the bounty as it would have been lost, and your answer was somewhat helpful. I misflagged your post as an answer, sorry — miniBill, Dec 24 '12 at 10:13

score 3 · Accepted Answer · answered Dec 04 '12 at 10:20

3

Check that your HTML is well formatted. I am not sure of the Doctype it validates against.

This happened to me because I used

<script ... />

instead of

<script ...></script>

Any tiny error will make your webview fail silently.

answered Dec 04 '12 at 10:20

Maragues

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Is there a way to know wether it is blank because of failed validation or other reasons? – miniBill Dec 04 '12 at 10:21
I can't remember the details, I do recall it being a big headache until I discovered it. Good luck! – Maragues Dec 04 '12 at 10:53

score 1 · Answer 2 · answered Dec 20 '12 at 06:14

I'm not sure that is your solution but can help. Since Android 4.0 WebKit updated into version 534.30. I noticed that on some web pages, after it has completed loading, the WebView redirects its content to a new page that says the following: "Webpage not available The webpage at file:///android_asset/webkit/ might be temporarily down or it may have moved permanently to a new web address". This is bug of new version of WebKit, in my case javascript from assets folder don't work in offline.

WebView works on android 2.3.3, shows blank page on 4.0.1

2 Answers2