Android Platform [about]

Platform           | API level | Code name       | Release date

Android 2.3.3  | 10           | Gingerbread      | February 9, 2011
Android 2.3     | 9             | Gingerbread      | December 2010
Android 2.2     | 8             | FroYo               | May 20, 2010
Android 2.1     | 7             | Eclair                | January 11, 2010
Android 2.0.1  | 6             | Eclair                | December 11, 2009
Android 2.0     | 5             | Eclair                | October 5, 2009
Android 1.6     | 4             | Donut               | September 16, 2009
Android 1.5     | 3             | Cupcake           | April 27, 2009
Android 1.1     | 2             | Petit Four         | February 9, 2009
Android 1.0     | 1             | N/A                 | September 23, 2008

 

Distribution of Android devices by platforms, January 2011. (in USA)