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					he version history of the Android operating system began with the release of version 1.0 in September
2008. Android is a mobile operating system developed by Google and the Open Handset Alliance.
Android has seen a number of updates since its original release. These updates to the base operating
system typically fix bugs and add new features. Generally, each version is developed under a code name
based on a dessert item. The code names were released in alphabetic order: Cupcake, Donut, Eclair,
Froyo, Gingerbread, Honeycomb, Ice Cream Sandwich.
Contents
 [hide]

    1 Beta
    2 Android 1.0
    3 Android 1.1
    4 1.5 Cupcake
    5 1.6 Donut
    6 2.0/2.1 Eclair
        6.1 2.0
        6.2 2.0.1
        6.3 2.1
    7 2.2 Froyo
    8 2.3.x Gingerbread
        8.1 2.3
        8.2 2.3.3
        8.3 2.3.4
        8.4 2.3.5
        8.5 2.3.6
        8.6 2.3.7
    9 3.x Honeycomb
        9.1 3.0
        9.2 3.1
        9.3 3.2
    10 4.x Ice Cream Sandwich
    11 See also
    12 References
    13 External links

[edit] Beta

Released 5 November 2007[1][2], SDK released 12 November 2007[3]
[edit] Android 1.0
HTC Dream (G1) introduced Android 1.0

Released 23 September 2008.[4] The first Android device, the HTC Dream (G1),[5] had these Android 1.0
features:

    Android Market application download and updates through the Market app
    Web browser to show, zoom and pan full HTML and XHTML web pages – multiple pages show as
windows ("cards")Video [6][7]
    Camera support, but no way to change resolution, white balance, quality, etc.[8]
    Folders allow the grouping of a number of app icons into a single folder icon on the Home screen.[9]
    Email provides access to email servers commonly found on the Internet and supports POP3, IMAP4,
and SMTP.[7]
    Gmail synchronization with the Gmail app
    Google Contacts synchronization with the People app
    Google Calendar synchronization with the Calendar app
    Google Maps with Latitude and Street View to view maps and satellite imagery, as well as find local
business and get driving directions using GPS[8]
    Google Sync allows management of over-the-air synchronization of Gmail, People, and Calendar
    Google Search of the internet and phone apps, contacts, calendar, etc
    Google Talk instant messaging
    Instant messaging, text messaging, and MMS
    Media Player enables managing, importing, and playing back but lacked video and stereo Bluetooth
support[7][8]
    Notifications appear in the Status bar – drag down to see details, also ringtone, LEDs and vibration
options.[6][7][10]
    Voice Dialer allows dialing and placing of phone calls without typing a name or number[7]
    Wallpaper allows the user to set the background image or photo behind the Home screen icons and
widgets.
    YouTube video player[11]
    Other apps include: Alarm Clock, Calculator, Dialer (Phone), Home screen (launcher), Pictures
(Gallery), and Settings.
    Other supported features include: WiFi, and Bluetooth.

[edit] Android 1.1

On 9 February 2009, Android 1.1 update for Android was released for T-Mobile G1 only. Included in the
update were resolved issues, API changes and:[12]

     Maps: Adds details and reviews when a user does a search on Maps and clicks on a business to view
its details.
     Dialer: In-call screen timeout default is now longer when using the speakerphone, Show/Hide Dialpad
     Messaging: Saving attachments
     System: Adds support for marquee in layouts.

[edit] 1.5 Cupcake
The Android Emulator default home screen (v1.5).

Based on Linux kernel 2.6.27. On 30 April 2009, the official 1.5 (Cupcake) update for Android was
released.[13][14] There were several new features and UI updates included in the 1.5 update:[15]

    Virtual keyboard: Support for 3rd party keyboards with text prediction & user dictionary for custom
words
    Widgets: Miniature application views that can be embedded in other applications (such as the Home
screen) and receive periodic updates[16]
    Camera: Video recording
    Gallery: Video playback (MPEG-4 & 3GP formats)
    Bluetooth: Stereo support added (A2DP and AVRCP profiles), Auto-pairing
    Browser: Copy and paste features added
    Contacts: Shows user picture for Favorites
    Dialer: Specific date/time stamp for events in call log and one-touch access to a contact card from call
log event
    System: Animated screen transitions
    Upload videos to YouTube
    Upload photos on Picasa

[edit] 1.6 Donut

Based on Linux kernel 2.6.29[17] On 15 September 2009, the 1.6 (Donut) SDK was released.[18][19]
Included in the update were:[17]

   Search: Voice Search & text entry search enhanced to include bookmarks & history, contacts, the
web, and more
   Search: Developers can now include their content in search results
    Text to speech: Features a multi-lingual speech synthesis engine to allow any Android application to
"speak" a string of text
    Android Market: Allows easier searching, app screenshots, etc.
    Camera, camcorder, and Gallery: Updated integrated with faster camera access
    Gallery: Now enables users to select multiple photos for deletion
    System: Updated technology support for CDMA/EVDO, 802.1x, VPNs, and a text-to-speech engine
    Display: Support for WVGA screen resolutions
    Speed improvements in searching and camera applications
    Expanded Gesture framework and new GestureBuilder development tool
    Google free turn-by-turn navigation

[edit] 2.0/2.1 Eclair
[edit] 2.0
Motorola Droid introduced Android 2.0

Based on Linux kernel 2.6.29[20] On 26 October 2009, the 2.0 (Eclair) SDK was released.[21] Changes
included:[22]

    Sync: Expanded Account sync. Multiple accounts can be added to a device for email and contact
synchronization
    Email: Exchange support, Combined inbox to browse email from multiple accounts in one page.
    Bluetooth: 2.1 support
    Contacts: Tap a contact photo and select to call, SMS, or email the person.
    Messaging: Search all saved SMS and MMS messages. Auto delete oldest messages in a
conversation when a defined limit is reached.
    Camera: Flash support, Digital zoom, Scene mode, White balance, Color effect, Macro focus
    Virtual keyboard: Improved typing speed, smarter dictionary learns from word usage and includes
contact names as suggestions.
    Browser: Refreshed UI, Bookmark thumbnails, Double-tap zoom, Support for HTML5
    Calendar: Agenda view enhanced, Attending status for each invitee, Invite new guests to events.
    System: Optimized hardware speed, Revamped UI
    Display: Support for more screen sizes and resolutions, Better contrast ratio
    Maps: Improved Google Maps 3.1.2
    MotionEvent class enhanced to track multi-touch events[23]
    Live Wallpapers: Home screen background images can be animated to show movement

[edit] 2.0.1

The 2.0.1 SDK was released on 3 December 2009.[24]

   Android 2.0.1 is a minor platform release deployable to Android-powered handsets starting in
December 2009. This release includes minor API changes, bug fixes and framework behavioral
changes.[24]

[edit] 2.1

The 2.1 SDK was released on 12 January 2010.[25]

   Android 2.1 is a minor platform release deployable to Android-powered handsets starting in January
2010. This release includes new API changes and bug fixes.[25]

[edit] 2.2 Froyo

2.2.2 latest release.[26] Based on Linux kernel 2.6.32.[27] On 20 May 2010, the 2.2 (Froyo) SDK was
released.[26] Changes included:[27]
   System: Speed, memory, and performance optimizations[28]
   Additional application speed improvements courtesy of JIT implementation[29]
   Integration of Chrome's V8 JavaScript engine 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 mobile network
   Updated Market application with batch and automatic update features[28]
   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[30]
   Support for installing applications to the expandable memory
   Adobe Flash support[31]
   Display: Support for extra high PPI screens (320 ppi), such as 4" 720p[32]

[edit] 2.3.x Gingerbread
Google Nexus S introduced Android 2.3 "Gingerbread"
[edit] 2.3

Based on Linux kernel 2.6.35.[33] On 6 December 2010, the 2.3 (Gingerbread) SDK was released.[34]
Changes included:[33]

    System: Updated user interface design for simplicity and speed
    Display: Support for extra-large screen sizes and resolutions (WXGA and higher)[32]
    Internet calling: Native support for SIP VoIP telephony
    Virtual Keyboard: Faster, more intuitive text input, improved accuracy, better suggested text. Voice
input mode
    Copy/Paste: Enhanced. Select a word by press-hold, copy, and paste
    Near Field Communication lets the user read an NFC tag embedded in a poster, sticker, or
advertisement
    New audio effects such as reverb, equalization, headphone virtualization, and bass boost
    New Download Manager giving users easy access to any file downloaded from the browser, email, or
another application
    Camera: Access multiple cameras on the device, including a front-facing camera, if available
    Media: Support for WebM/VP8 video playback, and AAC audio encoding
    System: Improved power management with a more active role in managing apps that are keeping the
device awake for too long
    System: Enhanced support for native code development
    System: Switched from YAFFS to ext4 on newer devices[35][36]
    Audio, graphical, and input enhancements for game developers
    Concurrent garbage collection for increased performance
    Native support for more sensors (such as gyroscopes and barometers)

[edit] 2.3.3

    Several improvements and APIs to the Android 2.3 platform.[37]

[edit] 2.3.4

    Support for voice or video chat using Google Talk.[38]

[edit] 2.3.5

25 Jul 2011
    Brought improved network performance for the Nexus S 4G, among other fixes and improvements.
    Fixed Bluetooth bug on Samsung Galaxy S
    Improved Gmail application

[edit] 2.3.6

    Voice search bug fixed.

[edit] 2.3.7

    Google Wallet support for Nexus S 4G

[edit] 3.x Honeycomb
[edit] 3.0
Motorola Xoom introduced Android 3.0.1 "Honeycomb"

3.0.1.[39] Based on Linux kernel 2.6.36.[40] On 22 February 2011, the 3.0 (Honeycomb) SDK was
released, for tablet computers only.[41][42] The first device featuring this version, the Motorola Xoom
tablet, was released on February 24, 2011.[43]

Changes include:[40]

     Optimized tablet support with a new virtual and “holographic” user interface
     System Bar: Quick access to notifications, status, and soft navigation buttons available at the bottom
of the screen
     Action Bar: Access to contextual options, navigation, widgets, or other types of content at the top of
the screen
     Multitasking: Tap Recent Apps in the System Bar, to see snapshots of the tasks underway and
quickly jump from one app to another
     Redesigned keyboard: To make entering text fast and accurate on larger screen sizes with greater
accuracy and efficiency
     Copy/Paste: Simplified, more intuitive
     Browser: Multiple tabs replace browser windows, form auto-fill, and a new “incognito” mode allows
anonymous browsing
     Camera: Quick access to exposure, focus, flash, zoom, front-facing camera, time-lapse, and more
     Gallery: View albums and other collections in full-screen mode, with easy access to thumbnails for
other photos
     Contacts: New two-pane UI and Fast Scroll to let users easily organize and locate contacts
     Email: New two-pane UI to make viewing and organizing messages more efficient. The app lets users
select one or more messages
     Support for video chat using Google Talk
     Hardware acceleration
     Support for multi-core processors

[edit] 3.1

The 3.1 SDK was released on 10 May 2011.[44] Changes included:

    UI refinements
    Connectivity for USB accessories
    Expanded Recent Apps list
    Resizable Home screen widgets
    Support for external keyboards and pointing devices
    Support for joysticks and gamepads
    Media: Support for FLAC audio playback.[45][46]
      High-performance Wi-Fi lock maintains high-performance Wi-Fi connections when device screen is
off
      Support for HTTP proxy for each connected Wi-Fi access point

[edit] 3.2

The 3.2 SDK was released on 15 July 2011.[47] Changes included:

   Improved hardware support, including optimisations for a wider range of tablets
   Easier access for apps to files on the SD card, e.g. for synchronisation
   Compatibility display mode for apps that have not yet been optimized for tablet screen resolutions
   New display support functions that give developers more control over the look and feel on different
Android devices.

Huawei MediaPad is the first tablet to use this version [48]
[edit] 4.x Ice Cream Sandwich
Galaxy Nexus introduced Android 4.0 "Ice Cream Sandwich"

Ice Cream Sandwich was previewed at the May 2011 Google I/O event,[49] and officially launched at the
Galaxy Nexus and Ice Cream Sandwich release event on 19 October 2011.[50] The SDK for Android 4.0
was publicly released on 19 October 2011.[51] Gabe Cohen from Google said that it is "theoretically
compatible" with any Android 2.3.x device currently in production.[52] The source code for this version is
scheduled to be released after the Galaxy Nexus ships.[53]

Features include:[54][55][56]

     Virtual buttons in the UI, in place of capacitive or physical buttons
     Separation of widgets in a new tab, listed in a similar list to apps
     Easier-to-create folders, with a drag-and-drop style
     A customizable launcher
     Improved visual voicemail with the ability to speed up or slow down voicemail messages
     Pinch-to-zoom functionality in the calendar
     Offline search, a two-line preview, and new action bar at the bottom of the Gmail app
     Ability to swipe left or right to switch between Gmail conversations
     Integrated screenshot capture (accomplished by holding Power and Volume-Down buttons)
     Improved error correction on the keyboard
     Ability to access apps directly from lock screen (similar to HTC Sense 3.x)
     Improved copy and paste functionality
     Better voice integration and continuous, real-time speech to text dictation
     Face Unlock, a feature that allows users to unlock handsets using facial recognition software
     New tabbed web browser, allowing up to 16 tabs
     Automatic syncing of browser with users' Chrome bookmarks
     Modern Roboto font
     Data Usage section in settings that lets users set warnings when they approach a certain usage limit,
and disable data when the limit is exceeded
     Ability to shut down apps that are using data in the background
     Improved camera app with zero shutter lag, time lapse settings, panorama mode, and the ability to
zoom while recording
     Built-in photo editor
     New gallery layout, organized by location and person
     Refreshed 'People' app with social network integration, status updates and hi-res images
     Android Beam, a NFC feature that lets user exchange websites, contact info, directions, YouTube,
etc.
     Hardware acceleration of the UI[57]
     Resizeable widgets, already part of 3.1 but new for cell phones.
     Wi-Fi Direct[58]
1080p video recording for vanilla android (was already possible for most flavors of android)

				
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