Android is an open-source platform consisting of an operating system, middleware, and key applications. It is used widely on smartphones and allows developers to create applications using Java. The Android SDK provides tools for development. The Open Handset Alliance, led by Google, promotes Android. Major members include HTC, who released the first Android phone. The Android architecture includes applications, an application framework, libraries/runtime, and the Linux kernel. Key features include the Dalvik VM, integrated browser, media support, and connectivity options. Applications are built from activities, intents, services, and content providers.

1. Presented By : Techno India College
Of Technology, Srijib Roy

2. What is ANDROID
• Google's Android is an open-source platform that's
currently available on a wide variety of smart phones.
• Android is a software stack for mobile devices that
includes an operating system, middleware and key
applications.
• The Android SDK provides the tools and APIs
necessary to begin developing applications on the
Android platform using the Java programming
language.
• Based on the Linux kernel

3. Open Handset Alliace
• Est. 5th Nov 2007, led by Google, open Source
• Main Product Android Platform
• Enthusiastic Support from Industry
– Equipment makers
– Network Operators
• HTC was First to deliver ANDROID

4. Open Handset Alliance Members

5. Open Handset Alliance (OHA)
→ It's a consortium of several companies

6. ANDROID ARCHITECTURE
The software stack is split into Four Layers::
• The application layer
• The application framework
• The libraries and runtime
• The kernel

8. Applications
Set of core applications including an email client, SMS
program, calendar, maps, browser, contacts
All applications are written using the Java programming
language.
Application Framework
Access location information, run background services, set
alarms, add notifications to the status bar, and much, much
more.
Build an application, including lists, grids, text boxes, buttons,
and even an embeddable web browser
Providing access to non-code resources such as localized
strings, graphics, and layout files

9. Libraries
• System C library - implementation of the C library (libc)
• Media Libraries - based on PacketVideo's OpenCORE
• Surface Manager - composites 2D and 3D graphic layers
• LibWebCore - a modern embeddable web view
• SGL - the underlying 2D graphics engine
• 3D libraries - based on OpenGL ES 1.0 APIs; the libraries
use hardware 3D acceleration
• FreeType - bitmap and vector font rendering
• SQLite - a powerful and lightweight relational database
engine

10. • Android Runtime
Includes a set of core libraries of JAVA that provides
most of the functionality
Runs in its own process, with its own instance of
the Dalvik Virtual Machine
The Dalvik VM executes files in the Dalvik
Executable (.dex)
Linux Kernel
Acts as an abstraction layer between the hardware
and the rest of the software stack.
Relies on Linux version 2.6 for core system services
such as security, memory management, process
management, network stack, and driver model.

11. Features
Dalvik virtual machine optimized for mobile devices
Integrated browser based on the open source Web Kit engine
Media support for common audio, video, and still image formats (MPEG4,
H.264, MP3, AAC, AMR, JPG, PNG, GIF)
GSM Telephony (hardware dependent)
Bluetooth, EDGE, 3G, and Wi-Fi (hardware dependent)
Camera, GPS, compass, and accelerometer (hardware dependent)
Rich development environment including a device emulator, tools for
debugging, memory and performance profiling, and a plug-in for the Eclipse
IDE

12. Anatomy of Android Application
There are four building blocks for an Android application:
• Activity
– a single screen
• Intent Receiver
– to execute in reaction to an external event(Phone Ring)
• Service
– code that is long-lived and runs without a UI(Media Player)
• Content Provider
– an application's data to be shared with other applications

14. WHY ANDROID??
• Layer
This is a vote for the potential of Layer as much as the
practical application. Walking around with your phone
As Layer continues to add new layers, and as camera and
mobile processing power continue to improve
Layer can show you points of interest on a Google-type map

15. • AnyCut
You can drop a lot of neat things on your Android home screen,
but you can't quite get one-click access to everything in your
phone's settings and extras
You'll have access to the deepest guts of your settings, so
switching 3G on and off, enabling location services, and
other tricks are easy to pull off

16. • TasKiller Free
Widgets you can add to your home screen for one-click
system rescuing.
Killing processes and apps willy-nilly can turn off alarms, kill
background syncing, and have other unintended
consequences.

17. • ASTRO File Manager
ASTRO File Manager does a great job of letting you navigate
files on your SD card and accessible internal memory, sure,
but it also has its own built-in task killer, backs up
applications, can send files as email attachments

18. • Slide Screen
You use your Android Smartphone differently than your desktop
computer
Slide Screen replaces, or just augments, if you'd like, your phone's home
screen, creating row after row of messages and feeds. Slide the center
info bar up and down to look at more or less of your items, swipe to the
right to dismiss items as read, and revel in having all your data on hand at
once.
Giving you 8 slots to put your most frequently accessed apps

19. Google’s Android OS for future MIDs
• Google to utilize its Android-based operating
system on future Moorestown
• Android is available on a variety of handsets,
including Google's Nexus One and Verizon's
Motorola Droid
• Two Android-centric phones — T-Mobile’s G1
and phone called “Magic” made by HTC
• Google, the developer of Android, says there are
eight or nine mobile phone manufacturers that are
planning to release 18 to 20 Android-based
models by the end of the year.

20. Cellphones Using Android OS
hkc-pearl-pda-phone-wm6
Google-android-phone-prototype Samsung-galaxy-vs-htc-magic
Sciphone_N19_Google with WIFI

22. Market Research
• The Android OS has knocked Apple out of the
number 2 slot and slid just behind RIM.
• NPD says first quarter sales ::Android has 28% while
Apple has 21%.
• Not only are Android-powered devices now
outselling iPhone but they’re also now besting
BlackBerry, making Android the top selling mobile
OS during the second quarter in the U.S.
• NPD has the race at Android – 33%, RIM – 28%, and
Apple – 22% for the period

25. iPhone OS 4 vs Android 2.2 vs Windows Phone 7 – The Inevitable Comparison

26. Conclusion
• Android is open to all: industry, developers
and users
• Participating in many of the successful open
source projects
• Aims to be as easy to build for as the web.
• Google Android is stepping into the next level
of Mobile Internet