Question

Also, how to test if the browser in device supports local storage?

Answer 1

I would say that HTML5 storage is supported since API Level 7 (2.1) because the method that enable it in WebSettings Object says it here, but I think I’m using it on the Native browser since Android 2.0.

// Javascript Test
if (typeof window.localStorage == 'object')
{
    // localStorage is supported
}
else
{
    // localStorage is not supported
}

http://jsfiddle.net/kcckq/

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Here is a blog post that tells us that is Android 2.1+

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Here is another article that is saying it’s Android 2.0+ and giving an example on how detecting if localStorage is supported.