Mobile Application Development-lecture

Mobile Application Developmentand Ubiquitous InteractionGiulio Jacucci, Professor giulio.jacucci@tkk.fi +358 50 384 1535

k.fi/~giulio/Trial-lecture/mobile-lecture.htm

This Lecture: Content– Why and How Mobile Development – Platform Selection – Development process – Emergent area: Ubiquitous interaction – Case studies

Aim– Get you convinced and providing basics: To get started developing!

Mobile? Application ? Development ? Mobile– Refers to a mobile device as opposed to a stationary PC. While generally Laptop are not considered mobile current trends Netbooks might change this!

Application– an application is a computer program designed to help people perform a certain type of work. – Stand alone or distributed, Sandboxed, etc.

Development– refers to more than programming, design, technology selection , organisation of tools, testing, publishing…

Rapidly growing Apps iPhone:Metro paris AR App

Android : Layar

App usages and developers

Why With manageable effort:– Have fun! – Learn to program – Have impact and get famous! – ContextCues / Jaiku / Google

Unprecedented opportunity– Since a decade mobile development has moved from Services to Applications giving more power to developers community

What’s so unique about mobile? Opportunity to develop for ubiquitous interaction through– Sensors and Multimodality – Interaction with real world and other devices

However:– Difficulty in developing efficient, non-sandboxed mobile applications cross platform

Very quick history Pocket PCs– C++ , J2ME – e.g. adding camera and GPS modules for barcode recognition and context awareness1995

Cell phones– WAP unusable, xhtml a bit better

Smartphones– J2ME, Symbian, – Python, Flash, Web technologies – Distributed applications2005

Platforms

Market shares

Development Process Design– Concept, interaction, graphics, user experience

Platform– Selection, Programs and Trusted Platforms, certificate signing

Programming– Language, tools, emulators

Testing– In particular in cross platform development!

Delivery– E.g. open source, App Store, Ovi Store etc.

Case CoMedia Java 2 Micro Edition as a MIDlet + native Symbian application for collecting context information runs in the background and transmits data to the Milet via an XML stream.

Case Study: Atwink! Anoto pen sends via bluetooth drawing to the mobile phone which has specialpurpose software designed for receiving and transmitting the data. This client software has been written in Python and C++2, and supports S60 3rd Edition phones such as the Nokia N95

MapLens Symbian OS S60 on Nokia N95 phones with camera and GPS. The paper map used with MapLens is an unmodified satellite image (with street overlay) from Google Maps 3D tracking and image augmentation execute directly on the phone for minimal latency

, the MapLens system relies on client/server architecture for storing and retrieving the media data (HTTP, ATOM)

Energy LifeWeb based 3D UI AJAX Full screen Touch InputApplication layer server-Detect client browser -Deliver adapted CSS, JavaScript and inclusion of tailored PHP files

- Browser independent CSS, JavaScript - Browser dependent CSS, JavaScript

Client browserTop-inforetrieve retrieve

applogin

Authenticate

Security-manager- Calling service layer web services using JAX-WS with JSON bindings

Circle-menu cardmenu Main-menu

Retrieve/ update

adviceUpdatersavingsUpdater quizUpdater

retrieve retrieve

XMLHttpRequest, name of callback function

Retrieve/ update

Service Layer web services

JSON object, as parameter in callback function

browser

retrieve

Examples from the Audience? …… Metro AR Paris Layar on Android Outlaw games (jailbroken )

Summary Until now difficulty to develop non sandbox cross platform applications Trends– Merging of Native and Web – Cross platform libraries e.g. QT

Ubiquitous Interaction– User experience expectation set high on playfulness, multimodality and ubiquitous use

Get started– Idea, team, platform, program, publish

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