Dhawal Android

8/3/2019 Dhawal Android

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DHAWAL GADIYACOMPUTER ENGINEERING

8TH SEM.

ROLL NO. 37


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INTRODUCTION

Acquisition

Open Handset Alliance

Licensing

Features

Platform

Operating Sysytem

Hardware

SoftwareDevelopment Architecture

Distribution

Overall Evaluation


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What is Android?

A software platform and operating system for mobile

devices

Bought by google in 2005. Google and other members of the Open Handset

Alliance collaborated on Android's development and

release in November 2007.

Based on the Linux kernel Allows writing code in the Java.


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What is the Open Handset Alliance(OHA)?

It is group of several companies.

Devoted to advancing open standards for mobile devices

Develop technologies that will significantly lower the

cost of developing and distributing mobile devices andservices


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License

Free software/open source license

Android is under version 2 of the Apache SoftwareLicense (ASL)


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Storage

SQLite

Connectivity

GSM, CDMA, EV-DO, Bluetooth Wi-Fi, WiMax

JAVA Support

Dalvik Virtual Machine(.dex)

Media Support

Audio, Video, Images

Market

Multitasking

Voice Based features

Call, text, Navigate


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Hardware

Used for cellphones, netbooks and tablets,

Eg. Dell Streak, Samsung Galaxy Tab, TV and otherdevices.

The first commercially available phone-HTC Dream,released on 22 October 2008.

In early 2010 Google collaborated with HTC to launch-Nexus One.

This was followed later in 2010 with the Samsung -Nexus S.


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OPERATING SYSTEM

Uses Linux for device drivers, memory management,

process management and networking

NETWORK CONNECTIVITY

It supports wireless communications using:

GSM mobile-phone technology

3G 802.11 Wi-Fi networks


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Development Requirments

Java

Android SDK

Eclipse IDE(optional)


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Android SDK

Class Library

Developer Tools

dx Dalvik Cross-Assembler

aapt Android Asset Packaging Tool

adb Android Debug Bridge

ddms Dalvik Debug Monitor Service

Emulator and System Images

Documentation and Sample Code

Eclipse IDE + ADT (Android Development Tools)

Reduces Development and Testing Time

Makes User Interface-Creation easier

Makes Application Description Easier


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Write app in Java

Compiled in Java

Transformed to Dalvik bytecode

Linux OS

Loaded into Dalvik VM


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Views such as lists, grids, text

boxes, buttons, and even an

embeddable web browser

Content Providers thatenable applications to

access data from other

applications (such as

Contacts), or to share their

own data

A Resource Manager,

providing access to non-

code resources such as

localized strings,

graphics, and layout files

A Notification

Manager that enables

all apps to display

custom alerts in the

status bar

An Activity Manager

that manages the life

cycle of applications

and provides a

common navigation

backstack


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Broadcast receivers can

trigger intents that start

an application

Data storage provide data

for your apps, and can be

shared between apps

database, file, and shared

preferences (hash map)used by group of

applications

Services run in thebackground and have no

UI for the user they will

update data, and trigger

events

Intents specify what

specific action should be

performed

Activity is thepresentation layer of

your app: there will be

one per screen, and the

Views provide the UI to

the activity


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ADVANTAGES

Ability to customize

Wide range of applications

Fast Processing

More advanced applications

Security


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Limitations

Android does not support

Bluetooth Stereo

Contacts exchange

Modem Pairing

Wireless Keyboards


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We can only hope that the next versions of

Android have overcome the actual limitations

and that the future possibilities became a

reality


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http://android-developers.com/

http://wikipedia.org/


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Dhawal Android

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