3. Andriod 1.5 Cupcake

On 27 April 2009, the Android 1.5 update was released, based on Linux kernel 2.6.27. This was the first release to officially use a codename based on a dessert item ("Cupcake"), a theme which would be used for all releases henceforth. The update included several new features and UI amendments:
Release date: 30 April 2009
Features:
  • Support for third-party virtual keyboards with text prediction and user dictionary for custom words
  • Support for Widgets – miniature application views that can be embedded in other applications (such as the Home screen) and receive periodic updates[31]
  • Video recording and playback in MPEG-4 and 3GP formats
  • Auto-pairing and stereo support for Bluetooth (A2DP and AVRCP profiles)
  • Copy and paste features in web browser
  • User pictures shown for Favorites in Contacts
  • Specific date/time stamp shown for events in call log, and one-touch access to a contact card from call log event
  • Animated screen transitions
  • Auto-rotation option
  • New stock boot animation
  • Ability to upload videos to YouTube
  • Ability to upload photos to Picasa