Android - Making Webview DomStorage persistant after app closed

Question

I'm facing a huge problem developing an Android app which use a Webview to display datas. The website i'm using in the webview use localStorage API of HTML 5.

To enable this feature i've set the webview setting like this :

webview.getSettings().setDomStorageEnabled(true);
webview.getSettings().setJavaScriptEnabled(true);

So the localStorage API works but when I close the app (and kill the process), localStorage is completly erased and when I reload it, all my datas are lost.

My question is simple : How to make DomStorage of a Webview persistant even when we close the app ?

Thank you for all you future answers.

Solution 1

Did you set the DatabasePath? Android doesn't know where to save the DOMDatabase by default, if you don't set it calling

webview.getSettings().setDatabasePath()

Solution 2

// Confimed on android 2.1 emulator
// enable javascript localStorage

WebSettings webSettings = myWebView.getSettings();
webSettings.setDomStorageEnabled(true);   // localStorage

// e.g., if your package is www.myapp.whatever;
webSettings.setDatabasePath("/data/data/www.myapp.whatever/databases/");

Solution 3

You must enable the database as well as setting its path:

webview.getSettings().setDatabaseEnabled(true);
webview.getSettings().setDatabasePath();
webSettings.setDomStorageEnabled(true);

The first line caught me out for quite a while...

Comments

[jimroot25]

I've found the solution, you need to set the databasePath in order to save datas : webview.getSettings().setDatabasePath();

[dongshengcn]

Can you share what the path you set it to? I am facing the same problem now.

[Anthony Webb]

Is it possible to read the local storage vars that are set by the html5 directly from java? I've found the question asked elsewhere, but no one seems to have an answer?

[Karthi]

what about in andorid 2.2 , whether its working or not, because for me in 2.1 its working but not in 2.2

[gheese]

note you can only call setDatabase path once - subsequent calls are ignored. You need to terminate the application to force WebKit to reload (calling Activity.finish() will not guarantee this) before any subsequent calls take affect

[Burak Tokak]

If you are having "setDatabasePath deprecated" error with this usage, in chromium webkit browser handles the path itself. See this answer for more