localStorage html5 feature not working in WebView on Android devices of some manufacturers

Mathias Lin

2014-10-01 00:35:33 UTC

Update: Storing and loading the value from localStorage works fine on all
devices while on the *same page*, however, not between different pages. In
my example, I can store and retrieve the value on 01_home.html, but when I
go to another page in the android_asset folder, I cannot retrieve it
anymore (on LG and Samsung device). Works fine on Nexus 4 though.

What is the reason for the different behaviour? Different WebKit version,
different Android version, vendor?

Post by Mathias Lin
I have a html5 application that I wrap in a WebView. To store and retrieve
user input values between pages, I use the *localStorage* html5 feature.
It works fine on my Nexus 4 (Android 4.4.4), but it does not work on
Samsung Galaxy Tab 2 (Android 4.3.x) (= nothing happens, but also no error
in logcat). Or, to be more clear: *on Samsung, it does not work if the
html pages are loaded from within the app's asset folder*. It does work
though if I put the pages on a web server, as below in the outcommented
line.
However, on Nexus 4, loading from file:///android_asset/ and also if I
load the pages on a desktop browser (Chrome, Firefox) from file:// path, it
is also working.
(I had another user reported the issue on a LG device, so it does not seem
to be Samsung specific).
Below are the settings of the web view.
webView = (WebView)this.findViewById(R.id.webView);
webViewClient = new MyWebViewClient(this);
webViewClient.setSm(sm);
webView.setWebViewClient(webViewClient);
WebSettings webSettings = webView.getSettings();
webSettings.setJavaScriptEnabled(true);
webSettings.setDomStorageEnabled(true);
webView.getSettings().setJavaScriptEnabled(true);
webView.getSettings().setDomStorageEnabled(true);
webView.getSettings().setPluginState(WebSettings.PluginState.ON);
webView.getSettings().setAppCacheEnabled(false);
webView.getSettings().setCacheMode(WebSettings.LOAD_NO_CACHE);
webView.getSettings().setUseWideViewPort(true);
webView.getSettings().setLoadWithOverviewMode(true);
webView.getSettings().setBuiltInZoomControls(false);
webView.getSettings().setSupportZoom(false);
webView.getSettings().setDefaultZoom(WebSettings.ZoomDensity.FAR);
webView.loadUrl("file:///android_asset/01_home.html"); // does NOT work!
// webView.loadUrl("http://192.168.178.33/01_home.html"); // does work!
// storingvar data = document.getElementById('data').value;
window.localStorage.setItem((1), data);
// reading
document.getElementById('data').value = window.localStorage.getItem(1);

--
You received this message because you are subscribed to the Google
Groups "Android Developers" group.
To post to this group, send email to android-***@googlegroups.com
To unsubscribe from this group, send email to
android-developers+***@googlegroups.com
For more options, visit this group at
http://groups.google.com/group/android-developers?hl=en
---
You received this message because you are subscribed to the Google Groups "Android Developers" group.
To unsubscribe from this group and stop receiving emails from it, send an email to android-developers+***@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.