Android is an open source operating system developed by Google and the Open Handset Alliance for use in mobile devices. It uses a modified Linux kernel and other open source software, allowing developers to write managed code using Java-like languages. Applications are compiled into Dalvik bytecode to run on Android's optimized virtual machine. This makes it easier for developers to build rich apps that can reuse components and share data across applications using intents and services.

1. Prince Bhanwra
801031024

2. What is Android..??
• Android is an open source* software platform and
operating system for mobile devices initially developed by
Android Inc. - a firm purchased by Google in year 2008.
Android is based on the modified version of Linux Kernel
and is a participant in Open Handset Alliance.
• It allows developers to write managed code in a Java-like
language that utilizes Google-developed Java libraries, but
does not support programs developed in native code.
SOFTWARE PROJECT MANAGEMENT PRESENTATION :: ANDROID EXPERIENCE 2

3. What is Android..? (contd.)
• Android is an open source* Operating
System for mobile phones
• Released by Google and the Open Handset Alliance for
smartphones.
3SOFTWARE PROJECT MANAGEMENT PRESENTATION :: ANDROID EXPERIENCE
http://www.openhandsetalliance.com/

4. What are Smartphones..?
• Smart Phone (Mobile Phone + PC Like functionality)
• Manages our personal life, work life & communication
• As available as possible
• Hell lot of applications
• Getting Cheaper.. ;)
• **Smartphones will double their share of all cellphones to
about 20 percent in the world
• And by year 2011,it is expected to have more number of
smartphones in U.S. than feature phones..
• Let’s see how..
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** http//:www.in-stat.com

5. • Popular Mobile Platforms:
– Microsoft Windows Mobile
– Nokia : Symbian, Series 60
– Apple, iPhone – OSX
– Access Linux Platform
– Palm Pre
– BlackBerry
– LiMO
– Google Android
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Mobile Platforms

6. 7
Linux Kernel
Native Libraries
Runtime + Dalvik VM
Application Framework
System Applications
Android Architecture

7. Android Architecture
8
Linux Kernel
Android Architecture

8. Android Architecture
9
Linux Kernel
Libraries
Android Architecture

9. 10
Linux Kernel
Native Libraries
Runtime
Android Architecture

10. 11
Linux Kernel
Native Libraries
Runtime + Dalvik VM
Application
Framework
Android Architecture

11. 12
Linux Kernel
Native Libraries
Runtime + Dalvik VM
Application Framework
System Apps
Android Architecture

12. 13
Linux Kernel
Native Libraries
Runtime + Dalvik VM
Application Framework
System Apps + Ur Applications
Android Architecture

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1. Android is open..
http://code.google.com/android/goodies/index.html
Well, Sort of..
Summary: Android Advantage

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2. Android makes mobile Java easier
http://code.google.com/android/goodies/index.html
Android Advantage (contd.)
Android provides access to a wide range of useful
libraries and tools that can be used to build rich apps.

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Write app in Java
Compiled in Java
Transformed to Dalvik bytecode
Linux OS
Loaded into Dalvik VM
Android Advantage (contd.)
3. Applications are compiled to Dalvik byte code

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The Dalvik runtime is optimized for mobile applications
Run multiple VMs efficiently
Each app has its own VM
Android Advantage (contd.)
• Android breaks down the barriers to building new
and innovative applications.
‫ﬤ‬ For an example, a developer can combine information
from the web with data on an individual's mobile
phone -- such as the user's contacts, calendar, or
geographic location -- to provide a more relevant user
experience.
4. Breaking down application boundaries:

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Android is designed to enable reuse of
components in other applications
Each application can publish its
capabilities which other apps can use
5. All applications are written in Java and
available to each other
Android Advantage (Summary)

18. • Android SDK includes
a virtual mobile
device - Lets you
prototype, develop,
and test Android
applications without
using a physical
device.
‫ﬤ‬ GPS support
‫ﬤ‬ Wi-Fi support
‫ﬤ‬ File explorer
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6. Android has Working Emulator
Android Advantage (contd.)

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Content Provider
enable applications to
share data.
Service is a
faceless task
that run in the
background
Intent Receiver
responds to
notifications or status
change. Can wake up
your process
Activity is UI
component
typically
corresponding
to one screen.
Android Applications
have common structure

20. Summarizing
&
Understanding
Intent
Pick Photo
(Replacing & Reusing components)
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Home
Blogger
Contacts
Gmail
MMS
Intent
Pick Photo
Photo
Gallery
Intent Receiver
System picks best
component for that action.
Components can be
replaced any time.
Picasa

21. SOFTWARE PROJECT MANAGEMENT PRESENTATION :: ANDROID EXPERIENCE 24
Show
Location
Home
Pick Photo
Send as email
Edit Contacts
Editing a
Document
Summarizing
&
Understanding
(Replacing & Reusing components)

22. Let’s feel the Android.. ;)
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My Applications.. ;)

24. Android is growing
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http://metrics.admob.com/wp-content/uploads/2010/06/May-2010-AdMob-Mobile-Metrics-Highlights.pdf
Uneven distribution of OS by regions

25. References
• http://developer.android.com/guide/basics/what-is-android.html
• http://sites.google.com/site/io/inside-the-android-application-framework
• http://www.vogella.de/articles/Android/article.html
• http://en.wikipedia.org/wiki/Android_%28operating_system%29
• http://www.helium.com/items/1694340-what-are-the-disadvantages-and-
drawbacks-of-the-google-android-operating-system
• http://blog.nielsen.com/nielsenwire/consumer/smartphones-to-overtake-
feature-phones-in-u-s-by-2011/
• http://en.wikipedia.org/wiki/Binary_Runtime_Environment_for_Wireless
• Book: Professional Android Application Development
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26. Questions?