Android load encrypted HTML+JS to webview from asset folder

Question

I have a "SIMPLE" problem which I tried for days to resolve but I didn't. I have an HTML with Javascript file encrypted with AES into my asset folder and what I want to do, is loading it into a webview after having decrypted it. I can't use load URL because loadUrl() needs a filePath and my file is encrypted so i can't give it since I have to decrypt it before

webView.loadUrl("file:///android_asset/encrypted.html");

so after I tried with

loadData(htmlJsString, "text/html", "UTF-8");

where htmlJsString is the encrypted.html file as a decrypted string but doing so only HTML code is working while javascript is not working( webView.setJavaScriptEnabled(true); ).

So in few words how can I load an encrypted HTML+JS into my webView from asset folder?

Please explain in detail what "while javascript is not" means. Is this JavaScript embedded in the HTML file? Also bear in mind that your encryption is likely to be pointless -- if your AES passphrase is hard-coded, it will be trivial to reverse-engineer it. — CommonsWare
– CommonsWare, Commented Jun 2, 2017 at 16:42
javascript is not working and is embedded, as for the passphrase for AES it's not a problem — Ares91
– Ares91, Commented Jun 2, 2017 at 16:44

Ilario Pierbattista · Accepted Answer · 2017-06-02 17:06:43Z

2

Make sure that this flags are set

WebSettings webSettings = webView.getSettings();
webSettings.setJavaScriptEnabled(true);
webSettings.setDomStorageEnabled(true);
webSettings.setLoadWithOverviewMode(true);
webSettings.setUseWideViewPort(true);
webSettings.setBuiltInZoomControls(true);
webSettings.setDisplayZoomControls(false);
webSettings.setSupportZoom(true);
webSettings.setDefaultTextEncodingName("utf-8");

edited Jun 2, 2017 at 17:06

answered Jun 2, 2017 at 16:43

Ilario Pierbattista

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4 Comments

Ares91 Over a year ago

htmlJsString is not a path it is the encrypted.html file which I read and decrypt , it's the content of the file

Ilario Pierbattista Over a year ago

I know. Read the method documentation, it should work:

Ilario Pierbattista Over a year ago

I've updated my answer. Pay attention to webSettings.setDomStorageEnabled(true);. Let me know

Ares91 Over a year ago

huuuu thanks it's workingggg... setDomStorageEnabled(true); Grazie per l'aiuto

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