1.6 (Donut)
Based on Linux Kernel 2.6.29[35] On 15 September 2009, the 1.6 (Donut) SDK was released.[36][37] Included in the update are:
* An improved Android Market experience.
* An integrated camera, camcorder, and gallery interface.
* Gallery now enables users to select multiple photos for deletion.
* Updated Voice Search, with faster response and deeper integration with native applications, including the ability to dial contacts.
* Updated search experience to allow searching bookmarks, history, contacts, and the web from the home screen.
* Updated Technology support for CDMA/EVDO, 802.1x, VPN, Gestures, and a Text-to-speech engine.
* Support for WVGA resolutions.
* Speed improvements for searching & the camera.[35]
2.0/2.1 (Eclair)
Based on Linux Kernel 2.6.29[38] On 26 October 2009 the 2.0 (Eclair) SDK was released.[39] Among the changes are:[40]
* Optimized hardware speed
* Support for more screen sizes and resolutions
* Revamped UI
* New browser UI and HTML5 support
* New contact lists
* Better white/black ratio for backgrounds
* Improved Google Maps 3.1.2
* Microsoft Exchange support
* Built in flash support for Camera
* Digital Zoom
* MotionEvent class enhanced to track multi-touch events[41]
* Improved virtual keyboard
* Bluetooth 2.1
* Live Wallpapers
On 3 December 2009 the 2.0.1 SDK was released.[42]
On 12 January 2010 the 2.1 SDK was released.[43]