Intro

1. Introduction
To
Android

2. What is Android ???
• Software stack for mobile devices
• Includes an operating system, middleware and
key applications..
• Developed by the Open Handset Alliance led by
Google.
Technology beyond the Dreams™ Copyright © 2006 Pantech Solutions Pvt Ltd.

3. HISTORY
• Open Handset Alliance ,a consortium of several
companies led by goggle.
• Unveiling of the Android platform was announced
on 5 November 2007 with the founding of OHA
• Based on the Linux kernel
Technology beyond the Dreams™ Copyright © 2006 Pantech Solutions Pvt Ltd.

4. OPEN HANDSET ALLIANCE
Technology beyond the Dreams™ Copyright © 2006 Pantech Solutions Pvt Ltd.

5. POPULAR VERSIONS
2.2.x FROYO
2.0/2.1x ECLAIRS 2.3.x GINGERBREAD
3.x HONEYCOMB
1.6.x DONUT
1.5.x CUPCAKE 4.x ICECREAM SANDWICH
Technology beyond the Dreams™ Copyright © 2006 Pantech Solutions Pvt Ltd.

6. VERSION USAGE
Technology beyond the Dreams™ Copyright © 2006 Pantech Solutions Pvt Ltd.

7. ARCHITECTURE OF ANDROID
Technology beyond the Dreams™ Copyright © 2006 Pantech Solutions Pvt Ltd.

8. LINUX KERNEL
• Core Services including hardware drivers,
process and memory management, security,
network and power management.
• Handled by Linux 2.6 kernel
• Kernel provides an abstraction layer between
hardware and the remainder of the stack.
Technology beyond the Dreams™ Copyright © 2006 Pantech Solutions Pvt Ltd.

9. Technology beyond the Dreams™ Copyright © 2006 Pantech Solutions Pvt Ltd.

10. CORE LIBRARIES
• While Android development is done in Java,
Dalvik is not a Java VM.
• The core Android libraries provide most of the
functionality available in the core Java Libraries
as well as the Android-specific Libraries.
Technology beyond the Dreams™ Copyright © 2006 Pantech Solutions Pvt Ltd.

11. DALVIK VIRTUAL MACHINE
• The Dalvik VM is a register-based architecture.
• A tool called dx is used to convert some (but not
all) Java .class files into the .dex format
• Multiple classes are included in a single .dex file
• Duplicate strings and other constants used in
multiple class files are included only once in the
.dex output to conserve space
• Java byte code is also converted into an
alternative instruction set used by the Dalvik VM
Technology beyond the Dreams™ Copyright © 2006 Pantech Solutions Pvt Ltd.

12. DALVIK VIRTUAL MACHINE
• An uncompressed .dex file is typically a few
percent smaller in size than a compressed .jar
(Java Archive) derived from the same .class files
Technology beyond the Dreams™ Copyright © 2006 Pantech Solutions Pvt Ltd.

13. LIBRARIES
• System C library - a BSD-derived
implementation of the standard C system library
(libc), tuned for embedded Linux-based devices
• A media library for playback of audio and video
media
• A surface manager to provide display
management
• Graphics libraries that include SGL and Open
GL for 2D and 3D graphics
Technology beyond the Dreams™ Copyright © 2006 Pantech Solutions Pvt Ltd.

14. LIBRARIES
• SQLite for native database support
• SSL and Webkit for integrated Web browser and
Internet Security
• FreeType - bitmap and vector font rendering
Technology beyond the Dreams™ Copyright © 2006 Pantech Solutions Pvt Ltd.

15. APPLICATION FRAMEWORK
• Activity Manager -Controls the lifecycle of your
Activities
• Views -Used to build an application, including
lists, grids, text boxes, buttons, and even an
embeddable web browser
• A Resource Manager, providing access to non-
code resources such as localized strings,
graphics, and layout files
Technology beyond the Dreams™ Copyright © 2006 Pantech Solutions Pvt Ltd.

16. APPLICATION FRAMEWORK
• A Notification Manager that enables all
applications to display custom alerts in the status
bar
• An Activity Manager that manages the lifecycle
of applications and provides a common
navigation back stack
• Content Providers that enable applications to
access data from other applications (such as
Contacts), or to share their own data
Technology beyond the Dreams™ Copyright © 2006 Pantech Solutions Pvt Ltd.

17. Why Android???
• Cost affordable and effective since it is an open
source
• Developers can easily identify and utilize Android
SDK for developing innovative Android
applications.
• Android Application Development has become
biggest and highest growing revenue generating
market
and many more…………
Technology beyond the Dreams™ Copyright © 2006 Pantech Solutions Pvt Ltd.

18. Android Vs Other OS
Technology beyond the Dreams™ Copyright © 2006 Pantech Solutions Pvt Ltd.

19. Android Market
• An online software store developed by Google for
Android OS devices
• Google announced the Android Market on 2008
• Android Market filters the list of applications to
those compatible with the user's device
• The Android Market application is not open
source. Only Android devices that comply with
Google's compatibility requirements may install
and access Google's closed-source Android
Market app
Technology beyond the Dreams™ Copyright © 2006 Pantech Solutions Pvt Ltd.

20. Technology beyond the Dreams™ Copyright © 2006 Pantech Solutions Pvt Ltd.

21. Next tutorial:
Hello Android-
An Introduction to Android
application Development
http://www.slideshare.net/pa
ntechsolutions/getting-
started-with-android-
software-development

22. Technology beyond the Dreams™ Copyright © 2006 Pantech Solutions Pvt Ltd.

23. For more details
– www.pantechsolutions.net
– http://www.slideshare.net/pantechsolutions
– http://www.scribd.com/pantechsolutions
– http://www.youtube.com/pantechsolutions
Technology beyond the Dreams™ Copyright © 2006 Pantech Solutions Pvt Ltd.