History Of Android OS Version.

The adaptation history of the Android portable working framework started with the arrival of the Android alpha in November 2007. The principal business adaptation, Android 1.0, was discharged in September 2008. Android is consistently created by Google and the Open Handset Alliance (OHA), and has seen various redesigns to its base working framework since the introductory discharge. 

The latest significant Android upgrade is Android 6.0 "Marshmallow", which was discharged in October 2015. Since April 2009, Android renditions have been created under a sweet shop themed code name and discharged in sequential order request, starting with Android 1.5 "Cupcake"; the prior adaptations 1.0 and 1.1 were not discharged under particular code names.


Pre-business discharge renditions 

The improvement of Android began in 2003 by Android, Inc., which was obtained by Google in 2005. 

Alpha 
    There were no less than two interior arrivals of the product inside Google and the OHA before the beta rendition was discharged in November 2007. For the points of reference in inside discharges, names of anecdotal robots were picked, with different discharges code-named "Astro Boy", "Drinking spree" and "R2-D2".

Dan Morrill made a percentage of the principal mascot logos, yet the present green Android logo was composed by Irina Blok.[6] The undertaking director, Ryan Gibson, considered the ice cream parlor themed naming plan that has been utilized for most of people in general discharges, beginning with Android 1.5 "Cupcake". 

Beta 
    The beta was discharged on November 5, 2007,while the product advancement pack (SDK) was discharged on November 12, 2007. The November 5 date is prevalently celebrated as Android's "birthday".



Adaptation history by API level 
        The accompanying tables demonstrate the discharge dates and key elements of all Android working framework redesigns to date, recorded sequentially by their official application programming interface (API) levels. 

Android 1.0 (API level 1) 
          Android 1.0, the principal business form of the product, was discharged on September 23, 2008. The main monetarily accessible Android gadget was the HTC Dream. Android 1.0 joined the accompanying elements: 

• Android Market permitted application downloads and upgrades through the Market application 

• Web program to appear, zoom and skillet full HTML and XHTML pages – numerous pages show as windows ("cards") 
• Camera support – be that as it may, this adaptation did not have the alternative to change the camera's determination, white parity, quality, and so forth. 
• Organizers permitting the gathering of various application symbols into a solitary envelope symbol on the Home screen 
• Access to web email servers, supporting POP3, IMAP4, and SMTP 
• Gmail synchronization with the Gmail application 
• Google Contacts synchronization with the People application 
• Google Calendar synchronization with the Calendar application 
• Google Maps with Street View to view maps and satellite symbolism, and in addition discover neighborhood business and get driving headings utilizing GPS 
• Google Sync, permitting administration of over-the-air synchronization of Gmail, People, and Calendar 
• Google Search, permitting clients to seek the Internet and telephone applications, contacts, schedule, and so forth. 
• Google Talk texting 
• Texting, content informing, and MMS 
• Media Player, empowering administration, importing, and playback of media documents – be that as it may, this rendition needed video and stereo Bluetooth support 
• Warnings show up in the Status bar, with choices to set ringtone, LED or vibration cautions 
• Voice Dialer permits dialing and setting of telephone calls without writing a name or number 
• Wallpaper permits the client to set the foundation picture or photograph behind the Home screen symbols and gadgets 
• YouTube video player 
• Different applications include: Alarm Clock, Calculator, Dialer (Phone), Home screen (Launcher), Pictures (Gallery), and Settings 
• Wi-Fi and Bluetooth support

Android 1.1 (API level 2) 

    On 2009  February 9,  Android 1.1 overhaul was discharged, at first for the HTC Dream as it . The redesign determined bugs, changed the Android API and included various components: 

• Points of interest and surveys accessible when a client scans for organizations on Maps 
• Longer in-call screen timeout default when utilizing the speakerphone, in addition to capacity to appear/stow away dialpad 
• Capacity to spare connections in messages 
• Support included for marquee in framework designs

Android 1.5 Cupcake (API level 3) 

       On  2009 April 27, the Android 1.5 upgrade was discharged, in light of Linux portion 2.6.27. This was the primary discharge to authoritatively utilize a codename in light of a sweet thing ("Cupcake"), a topic which would be utilized for all discharges from now on. The overhaul incorporated a few new components and UI alterations: 

• Support for outsider virtual consoles with content expectation and client lexicon for custom words 
• Support for Widgets – smaller than normal application sees that can be implanted in different applications, (for example, the Home screen) and get occasional updates 
• Video recording and playback in MPEG-4 and 3GP organizations 
• Auto-matching and stereo backing for Bluetooth (A2DP and AVRCP profiles) 
• Duplicate and glue highlights in web program 
• Client pictures appeared for Favorites in Contacts 
• Particular date/time stamp appeared for occasions in call log, and one-touch access to a contact card from call log occasion 
• Enlivened screen moves 
• Auto-pivot alternative 
• New stock boot liveliness 
• Capacity to transfer recordings to YouTube 
• Capacity to transfer photographs to Picasa

Android 1.6 Donut (API level 4) 

        On 2009 September 15, the Android 1.6 SDK – named Donut – was discharged, in view of Linux part 2.6.29. Incorporated into the redesign were various new elements: 

• Voice and content passage look upgraded to incorporate bookmark history, contacts, and the web 
• Capacity for engineers to incorporate their substance in list items 
• Multi-lingual discourse blend motor to permit any Android application to "talk" a string of content 
• Less demanding seeking and capacity to see application screenshots in Android Market 
• Exhibition, camera and camcorder all the more completely incorporated, with quicker camera access 
• Capacity for clients to choose different photographs for cancellation 
• Upgraded innovation support for CDMA/EVDO, 802.1x, VPNs, and a content to-discourse motor 
• Support for WVGA screen resolutions 
• Speed changes in seeking and camera applications 
• Extended Gesture structure and new GestureBuilder improvement device

Android 2.0 Eclair (API level 5) 

       On 2009 October 26, the Android 2.0 SDK was discharged, taking into account Linux part 2.6.29 and codenamed Eclair. Changes incorporate the ones recorded beneath: 

• Extended Account sync, permitting clients to add numerous records to a gadget for synchronization of email and contacts 
• Microsoft Exchange email support, with joined inbox to skim email from numerous records in one page 
• Bluetooth 2.1 backing 
• Capacity to tap a Contacts photograph and select to call, SMS, or email the individual 
• Capacity to hunt every single spared Sm and MMS messages, with erase most established messages in a discussion consequently erased when a characterized utmost is come to 
• Various new camera highlights, including streak support, computerized zoom, scene mode, white equalization, shading impact and large scale center 
• Enhanced writing speed on virtual console, with more astute lexicon that gains from word utilization and incorporates contact names as proposals 
• Invigorated program UI with bookmark thumbnails, twofold tap zoom and backing for HTML5 
• Timetable plan view improved, demonstrating going to status for every invitee, and capacity to welcome new visitors to occasions 
• Improved equipment speed and redid UI 
• Support for more screen sizes and resolutions, with better differentiation proportion 
• Enhanced Google Maps 3.1.2 
• MotionEvent class upgraded to track multi-touch occasions 
• Expansion of live wallpapers, permitting the activity of home-screen foundation pictures to show development.

Android 2.0.1 Eclair (API level 6) 

2009 December 3 

Minor API changes, bugfixes and system behavioral changes 

Android 2.1 Eclair (API level 7) 

2010 January 12 

Minor changes to the API and bugfixes 

Android 2.2–2.2.3 Froyo (API level 8) 

On 2010 May 20, the SDK for Android 2.2 (Froyo, short for solidified yogurt) was discharged, taking into account Linux portion 2.6.32. 

• Pace, memory, and execution advancements 
• Extra application speed changes, actualized through JIT assemblage 
• Joining of Chrome's V8 JavaScript motor into the Browser application 
• Support for the Android Cloud to Device Messaging (C2DM) administration, empowering push warnings 
• Enhanced Microsoft Exchange support, including security approaches, auto-revelation, GAL turn upward, schedule synchronization and remote wipe 
• Enhanced application launcher with alternate ways to Phone and Browser applications 
• USB tying and Wi-Fi hotspot usefulness 
• Choice to handicap information access over versatile system 
• Upgraded Market application with group and programmed overhaul highlights 
• Brisk exchanging between numerous console dialects and their word references 
• Support for Bluetooth-empowered auto and work area docks 
• Support for numeric and alphanumeric passwords 
• Support for record transfer fields in the Browser application 
• The program now demonstrates all casings of energized GIFs rather than simply the principal casing as it were 
• Support for introducing applications to the expandable memory 
• Adobe Flash backing 
• Support for high-PPI shows (up to 320 ppi, for example, four-inch 720p screens 
• Exhibition permits clients to view picture stacks utilizing a zoom motion

Android 2.3–2.3.2 Gingerbread (API level 9) 

On 2010 December 6, the Android 2.3 (Gingerbread) SDK was discharged, taking into account Linux piece 2.6.35.December 6, 2010 

• Upgraded client interface plan with expanded straightforwardness and rate 
• Support for additional vast screen sizes and resolutions (WXGA and higher) 
• Local backing for SIP VoIP web telephony 
• Speedier, more natural content data in virtual console, with enhanced precision, better proposed content and voice information mode 
• Upgraded duplicate/glue usefulness, permitting clients to choose a word by press-hold, duplicate, and glue 
• Support for Near Field Communication (NFC), permitting the client to peruse a NFC tag implanted in a blurb, sticker, or commercial 
• New sound impacts, for example, reverb, balance, earphone virtualization, and bass help 
• New Download Manager, giving clients simple access to any document downloaded from the program, email, or another application 
• Support for numerous cameras on the gadget, including a front-confronting camera, if accessible 
• Support for WebM/VP8 video playback, and AAC sound encoding 
• Enhanced force administration with a more dynamic part in overseeing applications that are keeping the gadget wakeful for a really long time 
• Upgraded support for local code advancement 
• Changed from YAFFS to ext4 on more up to date gadgets 
• Sound, graphical, and info improvements for diversion designers 
• Simultaneous junk accumulation for expanded execution 
• Local backing for more sensors, (for example, whirligigs and indicators) 

Android 3.0 Honeycomb 

On 2011 February 22, the Android 3.0 (Honeycomb) SDK – the principal tablet-just Android overhaul – was discharged, taking into account Linux part 2.6.36. The main gadget highlighting this form, the Motorola Xoom tablet, was discharged on February 24, 2011. The upgrade's elements included: 

• Advanced tablet support with another "holographic" client interface 
• Included System Bar, highlighting fast access to notices, status, and delicate route catches, accessible at the base of the screen 
• Included Action Bar, offering access to logical alternatives, route, gadgets, or different sorts of substance at the highest point of the screen 
• Improved multitasking – tapping Recent Applications in the System Bar permits clients to see depictions of the assignments in progress and rapidly hop starting with one application then onto the next 
• Upgraded console, making writing quick, proficient and precise on bigger screen sizes 
• Improved, more natural duplicate/glue interface 
• Different program tabs supplanting program windows, in addition to shape auto-fill and another "in disguise" mode permitting mysterious searching 
• Snappy access to camera presentation, center, streak, zoom, front-confronting camera, time-slip, and other camera highlights 
• Capacity to view collections and different accumulations in full-screen mode in Gallery, with simple access to thumbnails for different photographs 
• New two-sheet Contacts UI and Fast Scroll to let clients effectively compose and find contacts 
• New two-sheet Email UI to make seeing and sorting out messages more productive, permitting clients to choose one or more messages 
• Equipment quickening 
• Support for multi-center processors 
• Capacity to encode all client information 
• HTTPS stack enhanced with Server Name Indication (SNI) 
• Filesystem in Userspace (FUSE; piece module) 
• Prohibits applications from having compose access to auxiliary stockpiling (memory cards on gadgets with inside essential stockpiling) outside of assigned, application-particular indexes. Full access to essential interior stockpiling is still permitted through a different application-level authorization.

Android 3.1 Honeycomb  

2011 May 10

• UI refinements 
• Availability for USB embellishments (USB On-The-Go). 
• Extended Recent Applications list 
• Resizable Home screen gadgets 
• Support for outer consoles and guiding gadgets 
• Support for joysticks and gamepads 
• Support for FLAC sound playback
• Superior Wi-Fi lock, keeping up elite Wi-Fi associations when gadget screen is off 
• Support for HTTP intermediary for each associated Wi-Fi access point