The presentation is about android and its versions, its internal structure , how it works, and the history of it and about the people who have worked for it, it provides a major glimpse on everything about android

1. ANDROID OPERATING
SYSTEM

2. INTRODUCTION TO ANDROID
 An Open Handset Alliance (OHA) project
 Powered by Linux operating system
 Fast application development in Java
 A complete stack – OS, Middleware, Applications
 Open source under the Apache 2 license
 Open software platform for mobile development

3. HISTORY
 Android INC was founded in palo alto , california
united states on october 2003
 Andy Rubin, Rich Miner, Nick Sears and Chris white
developed the android
 Google acquired android inc on august 17 2005, and it
became a wholly owned subsidary Google inc

5. LINUX KERNEL
• NetworkingWorks as a HAL
• Device drivers
• Memory management
• Process management

6. LIBRARIES
• C/C++ libraries
• Interface through Java
• Surface manager – Handling UI
Windows
• 2D and 3D graphics
• Media codecs, SQLite, Browser engine

7. ANDROID RUNTIME
• Dalvik VM
– Dex files
– Compact and efficient than class
files
– Limited memory and battery
power
• Core Libraries
– Java 5 Std edition
– Collections, I/O etc…

8. Application Framework
• API interface
• Activity manager –
manages application life
cycle.

9. DEVICES

10. Open Handset Alliance(OHA)
 Open Handset Alliance is a consortium of several
companies
 On november 5 2007 Bradcom Corp, Google,
HTC,Intel,LG,Marvell tech group,Motorola,
NVIDIA,Qualcom,Samsung elctronics,sprint,
Nextel,T-mobile and Texas instruments joined OHA
 On December 9 2008 14 other new members including
Garmin Ltd,Sony ericson ,Toshiba etc joined OHA

11. VERSION HISTORY
 Still now android have come up with many versions
 1.5 – Cupcake
 1.6 – Donut
 2.0,2.1 – Eclair
 2.2 - Froyo
 2.3 – Gingerbread
 3.0,3.1,3.2 – Honeycomb
 4.0 – Icecream sandwich
 4.1 –jellybean
 4.4-kitkat
 5.0-lollypop

12. Features
 Handset layouts
 Storage
 Connectivity
 Messaging
 Multiple language support
 Web browser
 Java support
 Media support etc…

13. Android Market
 Its is the online software store developed by Google for
android devices
 It is preinstalled in all android devices
 There are more than 300,000 applications available in
the android market
 The estimated number of applications downloaded
from the android market as of December 2011 exceeded
10 billion
 The Operating system itself is installed in more than
130 million devices

14. Application security
 Android applications run in a sand box, an isolated
area of the OS that does not have access to the rest of
the system resources unless the permission is granted
by the user
 In august 2010, kaspersky lab reported detection of the
first mallicious program for android named as Trojan-
SMS.AndroidOS.fakeplayer.a, an SMS trojan
 AVG tech,Avast,Kaspersky are some of the well known
antivirus softwares present in the android market

15. Market Share
 Research company canalys estimated in q2 2009 that
android had a 2.8% share of worldwide smartphone
shipments
 By q4 2010 this had grown to 33%
 By q3 2011 gartner estimated more than half (52.5%)
the smartphones in the market belongs to the Android
OS
 Over 700,000 android devices are getting activated
everyday all over the world

16. Licensing
 The source code for android is available under free and
open source software licenses
 Google published their linux kernel changes under the
GNU general public license version and the rest of the
code under the Apache license version 2.0

17. Patents
 Oracle sued Google over claimed infringement of
copyrights and patents related to the java
programming language
 Microsoft has also sued several manufacturer of
android devices for patent infringement
 In august 2011, Google started the process of
purchasing Motorola mobility for us$ 12.5 billion
 In December 2011 google aqauired in the region of a
thousand patents from IBM,which may aid in defense
against oracle

18. Advantages
 While android is designed primarily for smartphones
and tablets , but due to its coustomizable nature its
used on other electronic devices like
smartbooks,laptops, wristwatches etc..
 As more than 300,000 applications are available in
android market we can install the applications which
are required according to our usage

19.  Android devices are having its wide usage and
popularity because its having the applications
which are useful for mail checking and social
networking etc….

20. THANK YOU