Mobile Application Development With Android

Mobile Application Development with ANDROID A.UMASHANKAR 06078115

Agenda
Mobile Application Development (MAD)
Intro to Android platform
Platform architecture
Application Framework & API
Application building blocks
Development tools
Hello Android
Porting application to Mobile

Few reasons to go MAD. . .
Smart Phones
Internet access anywhere
Social networking
GPS and Google Maps
Millions of mobile users
Open standards

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 system
Fast application development in Java
Open source under the Apache 2 license

Android APIs ❑ android.util ❑ android.os ❑ android.graphics ❑ android.text ❑ android.database ❑ android.content ❑ android.view ❑ android.widget ❑ com.google.android.maps android.app ❑ android.telephony ❑ android.webkit

Application building blocks
Activity
IntentReceiver
Service
ContentProvider

Activities
Typically correspond to one UI screen
But, they can:
Be faceless
Be in a floating window
Return a value
Activity refers to (J)Frame in Swing

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 IntentReceivers describe what Intents they can service

Intent Recievers
Components that respond to broadcast ‘Intents’
Way to respond to external notification or alarms
Apps can invent and broadcast their own Intent

Services
Faceless components that run in the background
E.g. music player, network download etc…

ContentProviders
Enables sharing of data across applications
E.g. address book, photo gallery
Provides uniform APIs for:
querying
delete, update and insert.
Content is represented by URI and MIME type

Android User Interfaces Hierarchy of Screen Elements
Different Layouts
Linear Layout
Absolute Layout
Table Layout

Comparing Android UI Elements to Swing UI Elements Comparing Android UI Elements to Swing UI Elements
Activities in Android refers almost to a (J)Frame in Swing.
Views in Android refers to (J)Components in Swing.
TextViews in Android refers to a (J)Labels in Swing.
EditTexts in Android refers to a (J)TextFields in Swing.
Buttons in Android refers to a (J)Buttons in Swing.

AndroidManfest.xml <manifest> This is the root node of each AndroisManifest.xml. It contains the package-attribute, which points to any package in out Activity. Other Activities-path will base relative to its value.

<application> Root element containing declarations of the application-level components contained in the package. This element can also include global and/or default attributes for the application, such as a label, icon,theme, required permission, etc.Quantity: 0 or 1. <activity> An Activity is the primary thing for an application to interact with the user. The initial screen the user sees when launching an application is an activity, and most other screens they use will be implemented as separate activities declared with additional activity tags. <intent-filter> Declares what kind of Intents a component supports. In addition to the various kinds of values that can be specified under this element, attributes can be given here to supply a unique label, icon, and other information for the action being described.

<action> An action-type that the component supports. Example: . <category> A category-type that the component supports. Example: Some other Tags Available…… <meta-data> <receiver> <service> <provider>

Application Development Steps
Download and Install the Android SDK and Test the Emulator.
Installing JDK and JRE(1.5 or above)
Install Eclipse.
Install ADT plugin for Eclipse
Creating HelloWorld Application

Application development contd., New > Project…
Select Android project in wizard menu

Application development contd.,

Application development contd., Main Activity>> Main.xml>>

Application development contd., AndroidManifest.xml>>

Application development contd., >>Running Your First Application

Application development contd., Output in the emulator

Application development contd., Uis using Java way

Porting Applications to Mobile
Resource files are bundled to .apk file archive
Bundled by aapt tool
One .apk file archive is a Single application

Interesting things to do
Android is open source
Opportunities for researchers
Get the source, compile and update the device image

References
http://developer.android.com
http://code.google.com/android
http://anddev.org

Thank You Queries

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Mobile Application Development With Android

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