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.

Answer 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()

Answer 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/");

Answer 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...