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分类: LINUX

2011-04-21 11:58:04

The version history of the began with the release of version 1.0 in September 2008. Android is a developed by and the . Android has seen a number of since its original release. These updates to the base typically fix and add new features. Generally each version is developed under a based on a . The code names are in alphabetical order.

Version history

1.0
Released 23 September 2008
1.1
On 9 February 2009, Android 1.1 update for Android was released for Only. Included in the update were:
  • Multiple resolved issues
  • API changes
  • Maps adds details and reviews
  • Screen timeout longer when using speakerphone
  • "Show" & "Hide" Dialpad included in-call menu
  • Support for saving attachments from MMS
  • Support for marquee in layouts
1.5 (Cupcake)

Based on Linux Kernel 2.6.27
On 30 April 2009, the official 1.5 (Cupcake) update for Android was released. There were several new features and UI updates included in the 1.5 update:[5]
  • Ability to record and watch videos through camcorder mode
  • Uploading videos to YouTube and pictures to Picasa directly from the phone
  • A new soft-keyboard with text-prediction
  • Bluetooth and support
  • Ability to automatically connect to a Bluetooth headset within a certain distance
  • New widgets and folders that can populate the Home screens
  • Animated screen transitions
1.6 (Donut)

Based on Linux Kernel 2.6.29
On 15 September 2009, the 1.6 (Donut) SDK was released. Included in the update were:
  • Improved Android Market experience
  • A new 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 /, , , and a engine
  • Support for screen resolutions
  • Speed improvements in searching and camera applications
  • Gesture framework and GestureBuilder development tool
  • Google free
2.0 / 2.1 (Eclair)

Based on Linux Kernel 2.6.29
On 26 October 2009, the 2.0 (Eclair) SDK was released. Changes included:
  • Optimized hardware speed
  • Support for more screen sizes and resolutions
  • Revamped UI
  • New Browser UI and support
  • New contact lists
  • Better contrast ratio for backgrounds
  • Improved Google Maps 3.1.2
  • Microsoft Exchange Server by 2.5 support
  • Built in flash support for Camera
  • Digital Zoom
  • MotionEvent class enhanced to track multi-touch events
  • Improved virtual keyboard
  • Bluetooth 2.1
  • Live Wallpapers

The 2.0.1 SDK was released on 3 December 2009.

The 2.1 SDK was released on 12 January 2010.

2.2 (Froyo)[15]
(2.2.2 latest release)

Based on Linux Kernel 2.6.32
On 20 May 2010, the 2.2 (Froyo) SDK was released.[15] Changes included:
  • General Android OS speed, memory, and performance optimizations
  • Additional application speed improvements courtesy of implementation
  • Integration of 's into the Browser application
  • Improved Microsoft Exchange support (security policies, auto-discovery, GAL look-up, calendar synchronization, remote wipe)
  • Improved application launcher with shortcuts to Phone and Browser applications
  • USB tethering and Wi-Fi hotspot functionality
  • Added an option to disable data access over
  • Updated Market application with batch and automatic update features
  • Quick switching between multiple keyboard languages and their dictionaries
  • Voice dialing and contact sharing over Bluetooth
  • Support for numeric and alphanumeric passwords
  • Support for file upload fields in the Browser application
  • Support for installing applications to the expandable memory
  • support
  • Support for extra high DPI screens (320 dpi), such as 4" 720p

2.3 (Gingerbread)[22]
(2.3.3 latest release)

Based on Linux Kernel 2.6.35
On 6 December 2010, the 2.3 (Gingerbread) SDK was released.[22] Changes included:
  • Updated user interface design
  • Support for extra-large screen sizes and resolutions ( and higher)
  • Native support for telephony
  • Support for /VP8 video playback, and audio encoding
  • New audio effects such as reverb, equalization, headphone virtualization, and bass boost
  • Support for
  • Improved system-wide functionalities
  • Redesigned multi-touch software keyboard
  • Enhanced support for native code development
  • Audio, graphical, and input enhancements for game developers
  • Concurrent for increased performance
  • Native support for more sensors (such as and )
  • A for long-running downloads
  • Improved and application control
  • Native support for multiple cameras
  • Switched from to the filesystem

3.0 (Honeycomb)
(3.01 latest release)

Based on Linux Kernel 2.6.36
On 22 February 2011 the 3.0 (Honeycomb) SDK was released. This is a tablet-only release of Android. The first device featuring this version, the tablet, was released on February 24, 2011.

Changes include:

  • Optimized tablet support with a new user interface
  • Three dimensional desktop with redesigned widgets
  • Refined multi-tasking
  • Browser enhancements including tabbed web pages, form auto-fill, bookmark syncing with , and private browsing
  • Support for video chat using
  • Hardware acceleration
  • Support for multi-core processors
Ice Cream Sandwich Possible mid-2011 release.
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