Android is a mobile operating system (OS) based on the Linux kernel and currently developed by Google. With a user interface based on direct manipulation, Android is designed primarily for touchscreen mobile devices such as smartphones and tablet computers, with specialized user interfaces for televisions (Android TV), cars (Android Auto), and wrist watches (Android Wear). The OS uses touch inputs that loosely correspond to real-world actions, like swiping, tapping, pinching, and reverse pinching to manipulate on-screen objects, and a virtual keyboard. Despite being primarily designed for touchscreen input, it also has been used in game consoles, digital cameras, regular PCs (e.g. the HP Slate 21) and other electronics.

2. WHAT IS ANDROID?
 A Software platform and operating system
for mobile.
 Based on the Linux kernel.
 Android was found way back in 2003.
 It was developed in Palo Alto, California.
 Android was developed by the Andy
Rubin, Rich Miner, Nick and Chris White.
 Android was purchased by the GOOGLE
in AUGUST,2005 for 50 million $.

3. Androidlogo was designed by Irina Blok

4.  It’s consortium of several companies.
 This group of companies are allowed to use
source code of Android and develop
applications.
 Reason for Nokia not to develop Android
Mobiles is Nokia is not part of OHA.

5.  Android supports wireless communication
using:-
 Android is a multi-process system, in
which each application (and parts of
the system) runs in its own process.
 3G Networks
 4G Networks
 802.11 Wi-Fi Networks
 Bluetooth Connectivity

7.  First Version of Android.
 The focus of Android beta is testing incorporating usability.
 Android beta will generally have many more problems on speed and
performance.
 The first commercial version of the software, was released
on 23 September 2008
 The first commercially available Android device was the
HTC DREAM

8.  Released on 9 February 2009
 Update released just for the HTC Dream only
 Longer in-call screen timeout default when using the
speakerphone, plus ability to show/hide dial pad
 Ability to save attachments in messages
 Support added for marquee in system layouts

9. HTC Dream

11.  Released on April 27, 2009.
 Added auto-rotation option.
 Copy and Paste feature added in the web
browser.
 Increased speed and performance but not upto
required level.
 Video recording and playback in MPEG-4 and 3GP
formats
 based on Linux kernel 2.6.27

13.  Released on September 15, 2009
 based on Linux kernel 2.6.29
 Voice search and Search box were added.
 Faster OS boot times and fast web browsing
experience.
 Ability for users to select multiple photos for
deletion

15.  Released on October 26, 2009.
 Bluetooth 2.1 support.
 Improved typing speed on virtual keyboard, with
smarter dictionary.
 Bluetooth 2.1 support
 Improved Google Maps 3.1.2
 Addition of live wallpapers, allowing the animation of
home-screen background images to show movement
 Some bugs are fixed in Android 2.1

17.  Released on May 20, 2010
 Based on Linux kernel 2.6.32
 Support for Adobe Flash 10.1
 Improved Application launcher & better browser
 USB tethering and Wi-Fi Hotspot functionality
 Speed, memory, and performance optimizations

19.  Released on December 6, 2010
 Based on Linux kernel 2.6.35
 Updated User Interface with high efficiency and speed
 Internet calling
 Support for multiple cameras on the device, including a front-
facing camera, if available
 New keyboard for faster word input.
 More successful version of Android than previous versions.
 Audio, graphical, and input enhancements for game
developers
 USB OTG Supports also introduced in Android 2.3.7

21.  Released on February 22, 2011.
 Based on Linux kernel 2.6.36
 Ability to encrypt all user data.
 This version of android is only available for tablets.
 Redesigned keyboard, making typing fast, efficient and accurate
on larger screen sizes
 Added System Bar, featuring quick access to notifications, status,
and soft navigation buttons, available at the bottom of the
screen

22.  Released on 10 May 2011
 Connectivity for USB accessories
 Resizable Home screen widgets
 Support for external keyboards and pointing devices
 Support for joysticks and gamepads
 Compatibility display mode for apps that have not been
optimized for tablet screen resolutions in Android 3.2
 Update to Google Books in Android 3.2
 Improved Adobe Flash support in browser in Android 3.2

24.  Released on 14 November 2011
 Based on Linux kernel 3.0.1
 Virtual button in the UI
 Easier-to-create folders, with a drag-and-drop style
 Wi-Fi Direct
 Separation of widgets in a new tab, listed in a similar manner
to apps
 Ability to shut down apps that are using data in the
background.
 A customizable launcher

26.  Released on June 27, 2012.
 Based on Linux kernel 3.0.31
 Smoother user interface.
 Ability to turn off notifications on an app specific
basis
 Improved camera app
 Google Wallet (for some devices like nexus 7)

27.  Released on 13 November 2012
 Based on Linux kernel 3.4.
 "Photo Sphere" panorama photos
 Lock screen improvements, including widget support and the ability
to swipe directly to camera Improved camera app
 Accessibility improvements: triple-tap to magnify the entire screen,
pan and zoom with two fingers
 Released on 24 July 2013
 Bluetooth Low Energy support
 Improvements to Photo Sphere
 Background Wi-Fi location still runs even when Wi-Fi is
turned off

29.  Release on 14 October 2013
 Notification and Navigation Bars Design
 QuickOffice integration
 Smoother UI
 Cloud Printing
 Low-power audio playback

31.  Material design : bold, colourful and responsive UI
 Battery : Power for the long haul
 Security : Keep your stuff safe and sound

32. Version Code name Release date Distribution
4.3 Jelly Bean July 24, 2013 0.2%
4.2.x Jelly Bean November 13, 2012 6.5%
4.1.x Jelly Bean July 9, 2012 34.0%
4.0.3–4.0.4 Ice Cream Sandwich December 16, 2011 22.5%
3.2 Honeycomb July 15, 2011 0.1%
3.1 Honeycomb May 10, 2011 0.0%
2.3.3–2.3.7 Gingerbread February 9, 2011 33.0%
2.3–2.3.2 Gingerbread December 6, 2010 0.1%
2.2 Froyo May 20, 2010 2.5%
2.0–2.1 Eclair October 26, 2009 1.2%
1.6 Donut September 15, 2009 0.1%
1.5 Cupcake April 30, 2009 0%

33.  Making source code available to everyone
inevitably invites the attention of hackers.
 Android operating system uses more
amount of battery as compared to normal
mobile phones.
 As we call Android is world of applications
we continuously need to connected with
the internet which is not possible for all the
users.

34. Drawbacks Android
• Hangs a lot
• Drain battery
• Internet connection is Important
• Over heats
• No Security

35. Android VS IOS Touch wiz
Nexus 5 Android 4.4 Iphone 5s ios 7.0.4

36. References
 en.wikipedia.org/wiki/Android_version_history#Android_1.0_.28API_level_1.29
Android.com