05-830FinalPresentaiton

MOBILE APPLICATION

DEVELOPMENT

“The search for common ground in a divided

market”

Ben Feigin

IN THE BEGINNING…

MOTOROLA DYNATAC 8000X

EARLY SMART PHONES

IBM Simon

Nokia 9000 Series

WHAT IS A “SMARTPHONE”

 Semi-Smart: Phone that offers features beyond

making calls

 E-mail

 Take pictures

 Plays mp3

 …

 Phone that runs a complete Operating System

 Offers a standardized platform for development

 Able to execute arbitrary 3

rd

party applications

QUICK FACTS

 Today

 Cell phones in use today ~ 1.2 billion

 Smartphones account for 14% ~ 170 Million

 Projected 2012

 Cell phones ~ 1.7 billion

 Smartphones 29% ~ 500 Million

 300% Smartphone growth in three years

MOBILE DEVELOPMENT

MOBILE DEVELOPMENT SOLUTIONS

 Java ME

 Symbian

 UIQ

 S60

 Android

 BlackBerry

 OVI

 Windows Mobile

 iPhone

 LiMo

 Ångström distribution

 Adobe Flash Light

 BREW

 OpenMoko

 Palm OS (Garnet OS, Cobalt OS)

 Palm webOS

 Mojo

WHY?

 Different Phones Different Uses

 Phones for consumer or phone for business

 V-Cast vs Palm

 Money

 Hardware made money

 Tried to maintain control over content and services.

 Wanted to charge 3

rd

party developers for the

privilege of using their platform.

 Digital signing

 Distribution mechanisms.

COMMON PROBLEM: ABSTRACTION

 Interface / GUI

 How does the developer create an interface

 Different interaction techniques

 Graphical capabilities of the phone

 Phone Services and Security

 What resources are available to your program

 What types of boundaries or constraints are put on

applications

 How can code be considered “safe”

OTHER ISSUES

 Distribution

 Centralized repository

 Direct OTI

 From PC

 Development

 Language familiarity

 Porting

 IDEs?

 Debugging

 Emulation Vs on Phone

 Performance

 Very limited resources

 Battery

THREE TIERED SOLUTION

 Virtual Environment

 Java ME

 BREW *

 Core Operating System

 Symbian

 LiMo

 Rich Operating System

 Android

 iPhone

VIRTUAL ENVIRONMENTS

JAVA PLATFORM

KVM / CLDC

 Specially designed mobile virtual machine

 Original Ran with 128k Memory footprint

 Paired down to bare bones

 Reduced versions of classes

 String, Object, Hashtable, Vector, Math, Simple Errors

 Yank out features

 No long, float, double

 Class Loaders

 Threading

 Multi dimensional arrays

 But Each phone implementation can add them back

 Takes a profile to complete the stack

MOBILE INFORMATION

DEVICE PROFILE

 Mobile Information Device Profile

 Adds libraries specific to Mobile phones

 IO

 Record management system

 Basic media playback system

 LCDUI- 2D drawing library typically used for

sprite based 2d games

 Optional packages

 SMS control

 PIM personal info management (Contact list control)

JAVA MICRO EDITION

 Almost all phones include a runtime

 Pluggable Architecture

 Attempted to be ubiquitous language for

development

 Security Model

 Relied heavily on digital signing

 Fell short of expectations

 Phone specific plug-ins

 Applications could be blocked without specific

certificates.

 Currently paired down version of java 1.3

JAVA MICRO EDITION

 New Version 3.0 just released

 Offers support for several new features

 GPS

 New Graphics library LWUIT

 Screen orientation

 Only available for windows

 Updated CLDC.

BINARY RUNTIME ENVIRONMENT FOR

WIRELESS (BREW)

 Developed by QUALCOMM

 V-Cast

 Similar to Java ME

 C/C++ vs Java

 Smaller subset of phones

 Tighter integration then ME

 Start to finish development integration

 High barrier to entry

 Number of large steps at high cost

 Java ME can be as simple as publish and go

OPERATING SYSTEMS

SYMBIAN

SYMBIAN: AT A GLANCE

 Huge Market Share

 45%

 Robust and well

vetted platform

 Very open

 Low overhead event-

based programming

 Strange flavor of C++

 Java and others with

SDK

 Resource

management is

cumbersome

 Two popular SDK’s

that are incompatible

Good Bad

UIQ VS S60

 Rival SDK’s for the Symbian OS

 UIQ

 Sony Ericsson

 Touch screen phones

 S60

 Developed and owned by Nokia

 Current industry leader

 Will become standard in late 2009

 Both offer a full development stack

S60 DEVELOPMENT:

THE STACK

S60 DEVELOPMENT:

IDE

 Carbide.c++

 Developed by Nokia

 IDE based on Eclipse platform

 Provides a set of tools for debugging

 SDK independent

 Carbide.vs

 Visual studio implementation

 Similar feature set

S60 DEVELOPMENT:

APPLICATION STRUCTURE

 All applications are treated as dll’s and have a

single entry point

 Main: Application Class

 Uses MVC style organization

 M: Document Class

 V: Container / ContainerView Class

 C: AppUI Class

S60 DEVELOPMENT:

CLASSES AND VARIABLES

Prefix

Category

Description

E

Enum

Values in enumeration

K

Constant

Class model

i

Member

Variable

Non-static ‘instance’ variable

a

Argument

Function argument

Automatic

Variable

Managed variable, destroyed

when out of scope

S60 DEVELOPMENT:

ACTIVE OBJECTS

S60 DEVELOPMENT: ERROR HANDLING

 LEAVE and TRAP vs try/catch

 Try Catch has large overhead

 Use TRAP Macro

 Cleanup is an issue

Tint error;

TRAP(error, fooL());{

If(error!=KErrNon)

{

// Handel exception

}

Void Ctest::FooL()

{

CBar* v1= new (Eleave) Cbar;

CleanupStack::PushL(v1);

//Do dangerious things

EvilMethodL();

CleanupStack::PopAndDestroy();

};

S60 DEVELOPMENT: SECURITY MODEL

 Data caging

 /Resource

 /Sys

 /Private

 /“Anything else”

 Capabilities

 Open to all

 Granted by user at install

 Symbian Signed

 OEM

S60 DEVELOPMENT: FUTURE

 June 24, 2008:

 Nokia outright purchased the Symbian OS

 Symbian Foundation Formed

 Goals

 “Provide a royalty-free open platform and accelerate

innovation”

 Combine Symbian OS, S60, UIQ

 Move code base to open source in next two years

 http://www.youtube.com/watch?v=UxGa6kyPOjk&feature=player_embedded

 http://www.youtube.com/watch?v=gAg_MOFNfFc&feature=player_embedded

OPERATING SYSTEMS

iPHONE

NUMBERS

 SDK Released March 6

th

2008

 Billion apps downloaded as of April 23

rd

 Includes both pay and free

 Assuming 10% paid downloads

 lowest price of $.99/app

 $99 Million

 17% Market share just in front of Blackberry

 Still well behind Symbian but growing very fast

iPHONE DEVELOPMENT

 Objective-C

 Message based architecture

 Similar to Smalltalk

 No Java VM or other 3

rd

party plugins

 “An Application may not itself install or launch

other executable code by any means, including

without limitation through the use of a plug-in

architecture, calling other frameworks, other

APIs or otherwise. No interpreted code may be

downloaded and used in an Application except for

code that is interpreted and run by Apple’s

Published APIs and built-in interpreter(s).” –

iPhone SDK EULA

iPHONE DEVELOPMENT:

SDK

 Four distinctive framework API’s

 Cocoa Touch Layer

 Media Layer

 Core Services Layer

 Core OS Layer

 IDE

 Xcode

 Interface Builder

 iPhone Simulator

 On phone application development

iPHONE DEVELOPMENT:

INTERFACE BUILDER / XCODE

 Design for graphical,

event-driven

applications

 Pallet of GUI widgets to

use in your views.

 Drag and drop widgets

onto views

 Links between objects

can be created

graphically

 MVC pattern designed

here

 Graphically declare

hooks into a program

 Produces Nib Files

iPHONE DEVELOPMENT:

DESIGN PATTERNS

 Delegation

 Don’t Subclass

 Method calls are

messages

 [Object Message]

 Both are dynamic

 Managed Memory

 Auto release

{

NSString *string =[... Alloc]…;

[string release];

return string; //??

}

{

NSString *string =[... Alloc]…;

[string autorelease];

return string;

}

iPHONE DEVELOPMENT:

APPLICATION LIFE CYCLE

iPHONE DEVELOPMENT:

SECURITY MODEL

 Originally all applications ran as root

 Not a whole lot better now

 All apps run as “mobile” user

 Survived this year’s Pwn2Own

 Security based on delivery mechanism

 All applications must be delivered through the

iTunes App Store

 Requires apple approval and testing

 $99 App Store

 $299 Enterprise

 Digitally signed by developer

iPHONE DEVELOPMENT:

FUTURE

 iPhone OS 3.0

 In app purchases

 Accessory APIs

 Peer to Peer connectivity

 New Game Kit

 iPod library access

 Embedded maps

 Copy & Paste

 Video

OPERATING SYSTEMS

Android

YEAR OF THE ANDROID?

 Averaged 47% growth/month

over first four months

 iPhone 88%

 Currently only on HTC

Dream(G1)

 Really cool concept but will it

penetrate the market

WHAT IS ANDROID

 Full Stack

 OS

 Middleware

 Applications

 IDE

 Fully Open

 Source and Ideology

 User Control

 Can establish preferred applications

 Application Modularity

 Apps provide functionality that can be used by others

ANDROID DEVELOPMENT:

THE STACK

ANDROID DEVELOPMENT:

JVM

 Dalvik

 Register-based Java virtual machine

 Runs .dex files

 Similar to a JAR

 Used a cross compiler tool ‘dx’

 Optimized for multiple instances

 Why not Java ME?

 Not fully open source

 Still under control of Sun Micro

 Veto on any proposed changes

ANDROID DEVELOPMENT:

APPLICATION OVERVIEW

 Packaged in one .apk file

 Each application lives in its “own phone”

 Its own Linux process

 Its own JVM

 Its own “file system”

 Component based architecture

 Activities

 Services

 Broadcast receivers

 Content providers

 Manifest file provides information about

components

ANDROID DEVELOPMENT:

ACTIVITIES

 A visual interface for one task a user will attempt

 Each activity gets a window to draw in.

 Similar to a controller, takes view objects to

display in the window

 Views can nest within each other

 Application can designate one activity as first

ANDROID DEVELOPMENT:

SERVICES

 Background process

 No UI

 Example: Media player

 Can connect (bind) to a service

 Currently running

 Or by starting it

 Once bound can communicate through predefined

interface

 Media Player: start, stop..

ANDROID DEVELOPMENT:

BROADCAST RECEIVERS / CONTENT PROVIDERS

 Broadcast Receivers

 Event listeners

 No UI

 Can broadcast events

 On event execute activity or display notification

 Content Providers

 Opens specific part of an applications data

 Uses Content Resolvers

 Not called directly

 Returns a cursor object

ANDROID DEVELOPMENT:

INTENTS

 Contains the target object, the target method,

and a URI of data to act on

 Activates components

 Aside from content providers

 Intent can call startActivity, startService,

sendBroadcast

ANDROID DEVELOPMENT:

ACTIVITY LIFE CYCLE

ANDROID DEVELOPMENT:

DEMO

 Video: Example integration using android

 http://www.youtube.com/watch?

v=3LkNlTNHZzE&feature=PlayList&p=611F8C5DB

F49CEC6&index=2

ANDROID DEVELOPMENT:

SECURITY

 Sand Box

 Without explicit permission

can’t get outside

 Each application can

control what gets exposed

 Permissions are declared at

install time and can’t

change

 App signing

 Digitally signed by

developer

ANDROID DEVELOPMENT:

FUTURE

 Could have changed

everything

 iPhone got there first

 True value of “Apps without

boarders?”

 Solid development platform

 Build on a language with

millions of developers

 Without limitations of Java

ME

 Net Books?

 Still far away

 Android doesn’t support X-

Server

 Tech demo already complete.

ON THE HORIZON

LiMo

 “LiMo believes that the growth of the mobile

industry depends on the existence of a broadly

accepted operating system.”

 SDKs

 Native

 Java

 Web

 Major Players:

 Verizon

 Motorola

 Docomo

 Vodafone

PALM webOS / MOJO

 Blurs the line between phone and web sources

 Native

 Application

 Cloud

 “Palm has extended the standard web

development environment through a JavaScript

framework that gives standardized UI widgets,

and access to selected device hardware and

services.”

 Video

QUESTIONS

 Can the development space ever be consolidated?

 How big a roll does a centralized distribution

mechanism play?

 Does the safety of the App Store warrant having to

pay $99 to develop something?

REFERENCES

 iphone vs. Symbian vs. Android vs. Limo vs. Ovi : We cannot compare an

ecosystem with an operating system

 http://opengardensblog.futuretext.com/archives/2008/06/iphone_vs_symbi_1.html

 Developing Secure Mobile Applications for Android

 http://www.isecpartners.com/files/iSEC_Securing_Android_Apps.pdf

 Architectural manifesto: How to Choose a mobile platform

 http://www.ibm.com/developerworks/architecture/library/wi-arch23.html

 AdMob Mobile Metrics Report

 http://metrics.admob.com/wp-content/uploads/2009/04/admob-mobile-metrics-

march-09.pdf

 What is Android

 http://developer.android.com/guide/basics/what-is-android.html

 Overview of LiMo

 http://www.limofoundation.org/images/stories/pdf/090211%20limo%20overview

%20v3.pdf

REFERENCES

 iPhone Application Programming Guide: The Core Application

 http://developer.apple.com/iphone/library/documentation/iPhone/Conceptual/iPhoneOSProgrammingGuide/

ApplicationEnvironment/ApplicationEnvironment.html#//apple_ref/doc/uid/TP40007072-CH7-SW1

 Using Symbian OS: Getting Started

 http://developer.symbian.com/main/documentation/books/books_files/pdf/Getting_Started_final.pdf

 Smartphone NUmbers

 http://www.boygeniusreport.com/2009/04/19/samsungs-says-smartphones-will-make-up-29-percent-of-the-market-

in-2012/

 UIQ Symbian

 http://www.sonyericsson.com/cws/companyandpress/pressreleases/pressrelease/pressreleaseoverview/

key.PressResource.Foundation_second_update_release_FINAL-20080909

 Obj-C memory

 http://www.macdevcenter.com/pub/a/mac/2001/07/27/cocoa.html?page=3

 Dalvik

 http://www.betaversion.org/~stefano/linotype/news/110/

 Android Tech Demo

 http://venturebeat.com/2009/01/01/android-netbooks-on-their-way-likely-by-2010/