Android is an open source, Linux-based operating system primarily used for mobile devices. It was developed by Android Inc. which was later acquired by Google in 2005. It uses Java for application development and includes features like connectivity, storage, messaging, web browsing, media support and more. Android has an architecture that includes a Linux kernel at the bottom, native libraries in C/C++, a Java-based application framework, and applications at the top. Development requires Java JDK, Android SDK and optionally Eclipse IDE. The latest API level for Android is 19.

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5. Introducing Android
The world's most powerful mobile platform
Most popular mobile operating.
Linux based operating system.
includes C, C++ and Java.
 free and open source operating system.
Source:
http://en.wikipedia.org/wiki/Android_operating_system
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6. History of Android
•Android, Inc. was founded in Palo Alto, California in
October 2003 by
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Andy Rubin (co-founder of Danger)
Rich Miner (co-founder of Wildfire Comm., Inc.)
Nick Sears (once VP at T-Mobile)
Chris White (headed design and interface development at WebTV
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financially backed and later purchased in 2005
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Source:
http://en.wikipedia.org/wiki/Android_operating_system

7. his chart provides data about the relative number of devices running a given version of the Android platform as of October 2 , 2013.
Version
Code name
Release date
API level
Distribution
1.5
Cupcake
April 30, 2009
3
0%
1.6
Donut
September 15, 2009
4
0%
2.0–2.1
Eclair
October 26, 2009
7
0%
2.2
Froyo
May 20, 2010
8
2.2%
2.3–2.3.2
Gingerbread
December 6, 2010
9
0%
2.3.3–2.3.7
Gingerbread
February 9, 2011
10
28.5%
3.1
Honeycomb
May 10, 2011
12
0%
3.2
Honeycomb
July 15, 2011
13
0.1%
4.0.3–4.0.4
Ice Cream
Sandwich
December 16, 2011
15
20.6%
4.1.x
Jelly Bean
July 9, 2012
16
36.5%
4.2.x
Jelly Bean
November 13, 2012
17
10.6%
4.3
Jelly Bean
July 24, 2013
18
1.5%
4.4
Kitkat
Soon..
19
0%
Source:
http://en.wikipedia.org/wiki/Android_operating_system
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8. History of Android
Open Handset Alliance :
Android : How it came to be
Members of Alliance
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10. Features of Android
Storage (SQLite, Light weight RDBMS)
Connectivity (GSM/EDGE, IDEN, CDMA, EV-DO, UMTS, BT, Wi-Fi, LTE, NFC and WiMAX)
Multiple language support
Messaging(SMS ,MMS,C2DM,GCM)
Web browser(webkit)
Java support (J2ME for third party)
Media support(MP3, MIDI, Ogg Vorbis, FLAC, WAV, JPEG, PNG, GIF, BMP, WebP)
Streaming media support
Additional hardware support
(video/still cameras, touchscreens, GPS, accelerometers, gyroscopes,
barometers, magnetometers and pressure sensors, thermometers )
Source:
http://www.android.com/about/
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11. Features of Android
Multi-touch
Bluetooth(A2DP, AVRCP,OPP,PBAP)
Video calling(Prior to Android 2.3.4)
Multitasking
Accessibility(Text to Speech)
Voice based features(Prior to Android 2.2)
Tethering(using WiFi hotspot)
Screen capture(Prior to Android 4.0)
External storage
Gesture Typing (Android 4.3)
Source:
http://www.android.com/about/
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13. Source:
http://en.wikipedia.org/wiki/Android_operating_system
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14. Linux Kernel :
Android Architecture
 Linux Kernel 2.6
Abstraction layer between the hardware and software stack
 Why Linux?
- Proven driver model and has existing drivers.
- Has memory management, security management,
networking, core operating system infrastructure, etc.
- Robust and already has been proven over time.
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Source:
http://en.wikipedia.org/wiki/Android_operating_system

15. Libraries :
Android Architecture
The next level up is the native libraries. Everything
that you see here in green is written in C and C++.
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Source:
http://en.wikipedia.org/wiki/Android_operating_system

16. Android Runtime :
Android Architecture
Main Component: Dalvik Virtual Machine
-Optimized for running in an embedded environment (limitedmemory, CPU,battery)?
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Source:
http://en.wikipedia.org/wiki/Android_operating_system

17. Application Framework:
Android Architecture
This is all written in a Java programming language and the
application framework is the toolkit that all applications use.
 These applications include the ones that come with a phone like the
home applications, or the phone application.
 It includes applications written by Google, and it includes apps that
will be written by you.
So, all apps use the same framework and the same APIs.
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Source:
http://en.wikipedia.org/wiki/Android_operating_system

18. Applications:
Android Architecture
And the final layer on top is Applications.
 This is where all the applications get written.
 It includes the home application, the contacts application, the browser, and
your apps.
 And everything at this layer is, again, using the same app framework
provided by the layers below.
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Source:
http://en.wikipedia.org/wiki/Android_operating_system

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20. Software Development :
Android Development
 Development Requirements:
Java JDK
 Android SDK
 Eclipse IDE (optional)
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 Programming Languages
 Java – officially supported
 C/C++ – also possible but not supported
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Source:
http://en.wikipedia.org/wiki/Android_operating_system

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22. What’s New :
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API LEVEL : 19

23. Suggestion please… 
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