Gmail content provider for message access

Unlike Contacts, there is no currently public API available in the SDK to allow access to Gmail, SMS, and MMS. The Gmail content provider does not appear to be publicly supported. Does anyone have any information on using this content provider with Android 2.x, and/or the status of making Gmail, SMS and/or MMS access officially supported via the SDK or official document开发者_如何学Goation?

Here's some info on gmail content provider How to get the number of unread gmail mails (on android).