Android is an open source software platform and operating system for mobile devices. It was developed by Android Inc., which was acquired by Google in 2005. Android allows developers to write code in Java and uses the Linux kernel. It supports running multiple apps simultaneously, optimized graphics, and a large app market. The Android architecture includes the Linux kernel, native libraries, Dalvik virtual machine, application framework, and applications.

2. Objectives
• What is Android
• History
• Features
• Android Versions
• Android Architecture

3. What is Android?
• Open source software platform and operating
system for mobile devices
• Based on the Linux kernel
• Allow writing code in the Java language
• Own virtual machine—DVM (Dalvik Virtual
Machine)

5. • Android Inc. founded in Palo Alto, California,
US in October 2003
• Team members: Andy Rubin, Rich Miner, Nick
Sears and Chris White
• Google acquired Android Inc. on 17 August
2005.
• Later developed by OHA (Open Handset
Alliance) from 2007

7. Features
• Android can run multiple apps at same time
• Also support optimized graphics VGA, 2D
graphics and 3D graphics
• Android has a better app market
• Android lets you change your settings faster
• It gives you more options to fit your budget
• Android keeps information visible on your home
screen
• Android also support Java applications

8. Android Versions

9. 27 April 2009

10. 15 September 2009

11. 26 October 2009

12. 20 May 2010

13. 06 December 2010

14. 22 February 2011

15. 19 October 2011

16. 09 July 2012

17. 31 October 2013

18. 3 November 2014

19. Android Architecture

20. Linux Kernel
• It relies on Linux version 2.6
• Provides Security, Memory and Process Management

21. Native Libraries
• Own libraries written in C/C++
• Native Libraries to run application
• It is needed for the stable performance of
components

22. Android Run Time
• Main Dalvik Virtual Machine is located
• Includes a set of java core libraries

23. Application Framework
• Tool kit used to create applications
• Consists of Activity, Package, Telephony and
Notification manager

24. Application Layer
• Uppermost Layer
• Includes Home application, the Contact
Application, the Phone, the Browser and apps
• Works with end user with the help of application
framework to operate

25. Thank You
By:
Nisha
Sonali Chawla