android new

8/3/2019 Android New

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Mobile Application Development(MAD)

Intro to Android platformPlatform ArchitectureApplication Building Blocks

Development ToolsHello Android


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Few reasons to go MAD

Smart PhonesInternet access anywhereSocial networking

Millions of mobile users

Open Standards


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Introduction to Android

Open software platform for mobile

development

A complete stack OS, Middleware,Applications

An Open Handset Alliance (OHA) project

Powered by Linux operating systemFast application development in Java

Open source under the Apache 2 license


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Linux Kernel

Works as a HAL

Device Drivers

Memory Management Process Management

Networking


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Libraries

C/C++ libraries

Interface through Java

Surface Manager Handling UI Windows

2D and 3D graphics Media codes, SQLite, Browser engine


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Android Runtime

DalvikVirtual Machine

Dex files

Compact and efficient

than class files Limited memory and

battery power

Core Libraries

Java 5 Std edition

Collections, I/O etc


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Application Framework

API interface

Activity Manager manages

application life cycle.


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Applications

Built in and user apps

Can replace built in apps


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Application Building Blocks

Activity

Intent ReceiverServiceContent Providers


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Activities

Typically correspond to one UIscreen

But, they can:Be facelessBe in a floating window

Return a value


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Intent Receivers

Components that respond to

broadcast IntentsWay to respond to externalnotification or alarms

Apps can invent and broadcast theirown Intent


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Intents

Think of Intents as a verb and object; a

description of what you want done

E.g. VIEW, CALL, PLAY etc..

System matches Intent with Activity that can

best provide the service

Activities and Intent Receivers describe what

Intents they can service


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Services

Faceless components that run inthe background

E.g. music player, networkdownload etc


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Content Providers

Enables sharing of data acrossapplications

E.g. address book, photo galleryProvides uniform APIs for:

querying

delete, update and insert.Content is represented by URI and

MIME type


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Development Tools

Eclipse

Android SDK 1.0-2.0developer.android.com


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Network Connectivity

It supports wireless communications using:

GSM mobile-phone technology

3G

Edge

802.11 Wi-Fi networks


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Devices


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Application Lifecycle

Application run in their ownprocesses (VM, PID)

Processes are started and stoppedas needed to run an application'scomponents

Processes may be killed to reclaimresources


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Views


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Views


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Notification Manager


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What is the Open Handset Alliance

(OHA)???

Devoted to advancing open standards formobile devices

Develop technologies that will significantlylower the cost of developing and distributingmobile devices and services


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Limitations

Bluetooth limitationso Android doesn't support:

Bluetooth stereoContacts exchangeModem pairing

Wireless keyboards

Firefox Mobile isn't coming to Androido Apps in Android Market need to be

programmed with a custom form of Java Mozilla and the Fennec won't have that


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