CONCEPT OF ANDROID OS BY

AJITH KUMAR

CONTENTS

• PREFACE

• ANDROID WHAT AND WHY ?

• VERSIONS OF ANDROID

• ARCHITECHTURE OF ANDROID WITH LAYERS

• SECURITY AND PRIVACY

• DEMO

• APPLICATIONS

• BEYOND SMARTPHONES AND TABLETS

• FUTURE DEVELOPMENTS

• IMAGES

PREFACE

This presentation is delivered to you for improving the

knowledge about android Operating system which is now the order

of the day. According to our view this Android is a boon for

everyone. At this time we would like to convey our gratitude to

our Parents and all our friends and for encouraging us to prepare

this presentation.

ANDROID WHAT AND WHY?

• Android  is a Linux-based operating system.

• It is designed primarily for touch screen mobile devices such as smart

phones and tablet computers.

• The first Android-powered phone was sold in October 2008.

• Android is open source and Google releases the code under the Apache

License. 

VERSIONS

Cupcake:

Android 1.5 Donut:

Android 1.6  Eclair:

Android 2.0, also 2.0.1

Android 2.1

Android 2.1-update1 Froyo

Android 2.2, also 2.2.x updates Gingerbread:

Android 2.3, also 2.3.x updates

Honeycomb:

Android 3.0, also 3.0.x updates

Android 3.1

Android 3.2 Ice Cream Sandwich:

Android 4.0 Jelly Bean:

Android 4.1

Android 4.2

Android 4.3 KitKat Lolipop

 

ARCHITECHTURE

LINUX KERNAL

The basic layer is the Linux kernel.

It is this Linux that interacts with the hardware and contains all the

essential hardware drivers.

Android uses the Linux for all its core functionality such as

Memory management, process management, networking, security

settings etc.

APPLICATION FRAMEWORK

• These are the blocks that our applications directly interacts with.

• These programs manage the basic functions of phone like resource

management, voice call management etc.

LIBRARIES Surface Manager 

It is used for compositing window manager with off-screen buffering.

Media framework

Media framework provides the recording and playback of different media

formats.

SQ Lite

SQ Lite is the database engine used in android for data storage purposes. 

Web Kit

It is the browser engine used to display HTML content.

LIBRARIES

• OpenGL

Used to render 2D or 3D graphics content to the screen.

• Android Runtime

Android Runtime consists of Dalvik Virtual machine and Core Java

libraries.

• Dalvik Virtual Machine

It is developed by Dan Bornstein of Google.

APPLICATIONS

Applications are the top layer in the Android architecture and this is where

our applications are gonna fit.

Several standard applications come Pre-installed with every device, such

as:

SMS client app

Dialer

Web browser

Contact manager

MEMORY MANAGEMENT

• Android devices are usually battery-powered.

• Android manages the apps stored in memory automatically.

• This process is designed to be invisible to the user.

• Android is designed to manage memory (RAM) to keep power

consumption at a minimum, in contrast to desktop operating systems.

SECURITY AND PRIVACY

Several security firms, such as

Lookout Mobile Security, AVG

Technologies, and  McAfee, have

released antivirus software for

Android devices.

This software is ineffective as

sandboxing also applies to such

applications, limiting their ability to

scan the deeper system for threats.

DEMO

APPLICATIONS

• Applications are developed in the Java language using the Android

software development kit (SDK).

• The two major Android app stores are Google play store and

Amazon app store

BEYOND SMART PHONES AND TABLETS

The Android operating system

has seen applications on smart

glasses (Google Glass),

wristwatches, headphone.

FUTURE DEVELOPMENTS

• In 2011, Google demonstrated "Android @Home", a new home

automation technology which uses Android to control a range of

household devices including light switches, power sockets and

thermostats.

• Prototype light bulbs were announced that could be controlled from

an Android phone or tablet.

IMAGES

CREDITS & SOURCE

SOURCE:

www.wikipedia.com

www.google.com

www.googleimages.com