As far as I know (there wasnβt such a device), on Android 3+ devices, the http://openlayers.org/dev/examples/mobile.html page will work directly from when opening the stock in the browser. As already mentioned, since the multi-touch events of mobile devices OL 2.11 are supported, they also provided jQuery with a mobile and geolocation demo that works great on Android.
For most Android 2.x devices, you will need to provide your own web view container, including a polyfill like WMP , if you want the spread and scaling to increase in order to work.
Otherwise, you will remain using the zoom buttons - which is not always preferable, given the small size of many touch screens.
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