Android is an open source operating system designed for mobile devices. It is based on a Linux kernel with applications built using Java. Google acquired Android and developed it with the Open Handset Alliance. Key versions included Cupcake, Donut, Eclair, Froyo, Gingerbread, Honeycomb, Ice Cream Sandwich, Jelly Bean, KitKat, Lollipop, Marshmallow and Nougat, with each named after a dessert item and focusing on improvements like features, performance and stability. Android supports graphics, multiple languages and apps but can experience slow response, heat and advertisement issues.

1. Mobile computing
– Android OS
Designed by,
R.Bakkiyalakshmi,
R.Balaji

3. • A software platform and operating
system for mobile devices
• Based on a Linux kernel. Applications
are Java Based
• Open source
• Google acquires android from Open
Handset Alliance.

5. The software stack is split into Four
Layers:
• The application layer
• The application framework
• The libraries and runtime(Dalvik
Virtual Machine)
• The kernel

7. • Mainly focused on fixing bugs, and
adding features to provide more
comfortable environment.
• Version names are based on dessert
item.
• The version and its features are:

8. • Launched in September 2008
• Support for using the internet
and internet-based services
such as: full HTML and
Google services.
• Mainly focused on business
smart phones, with lack of
entertainment system –
minimal control over the
camera

9. • Launched on April 30,2009.
• Introduced together with
Android’s first touchscreen
– only phone: HTC Magic.
• Enabled the copy-paste-
feature
• Video recording – MP4 and
3GP
• Uploading capabilities

10. • Launched on
September 2009.
• Includes text-to-
speech technology.
• Allow WVGA(Wide
Video Graphics
Array) screen
resolution.

11. • Launched October 2009
• Introduction of live
wallpaper
• Support Bluetooth 2.1-fast
file transfers
• Support for HTML5 and an
improved navigational
experience with Google
maps.

12. • Launched on May, 2010
– Frozen Yogurt
• Features – USB tethering
and portable Wi-Fi
hotspot
• Support 3D photo shots
gallery without selecting
to see the full photo first
• Better data protection

13. • Launched on December
2010.
• Copy-paste – block of
text
• Better power
management
• Introduce Google
Wallet

14. • Launched on February 2011.
• Specially designed for
tablets.
• No need for physical buttons.
• Two bars: 1) action bar
2) system bar
• Better hardware acceleration
and 3D graphics support.

15. • Launched on October 2011
and updated in March 2012
• Allows video chat
• Snapshot integrate with
power and volume button –
shutter sound indicates
picture has taken.
• Include all the above
version features

16. • Launched on June 2012.
• Enhanced animations and
transitions
• Without launching the
app – view the
notifications
• Voice search

17. • Launched on October 2013.
• Battery and RAM
optimization
• Features – music control
form lock screen, smart
caller ID based on Google
Maps, Cloud printing etc.,

18. • Launched on October
2014
• Interface design –
Material Design
• Includes performance and
stability updates, multiple
SIM card support, HD
voice calling, Device
protection.

19. • Launched on 2015
• Aimed at improving
performance and stability.
• Focused six areas:
1) first three – user experience
& security
2) next three – Android pay
• Feature – automatic sign in,
saved passwords etc.,

20. • Supports 2D, 3D graphics
• Support multiple languages
• Java support
• Video calling
• Open Source Framework
• Updated User Interface Design
• Low chance of Crashing
• Stability

21. • Slow response
• Heat
• Advertisement
• Android doesn't support:
1) Bluetooth stereo
2) Contacts exchange
3) Wireless Keyboards

22.  As we all know that a Smartphone is one which
does all the work which a personal computer do,
at cheaper price android does it, so that every can
access and modify it for his needs.
The android team is trying to make the OS for PC
so that it can also available for cheaper and better
computing facilities for future.