MobFest February 2009

Aaron Chan

Business Developer

Cross Platform Development & Porting

The causes

What causes fragmentation?The Fragmentation Problem

The causes

What causes fragmentation?

Hardware differences, models & markets

Verification of handsets /java

New JSRs and APIs

The speed of the standards process

Manufacturer differentiation

Handset customization

Handset variation & language differences

Why fragmentation?

Strategies

How to deal with fragmentation (1)

A) The brute force method

Create reference versions Create 10-15 primary ports Create 50-100 secondary ports

Involves code washing, pre-processing search & replace expressions, various manual adjustment.

Typical for Java applications deployment

How to deal with fragmentation

Strategies

B) The transcoding method

Create reference versionsCreate a port for each OS For each phone in each group, carry out transcoding using device profiles

Normally, the source code is often sent elsewhere for treatment

Or use transcoding

Strategies

C) Advanced compiler technology

Make the code:Transformableable to carry out complex analysisable to perform static checksform an application syntax tree

A compiler back-end for each OS, adapted to optimally output code for each target platform, in analogy to GCC technology and its back-end(s)

Which is what we’re gonna be showing you here today!

Or transform

MoSync

MoSync a cross platform (Symbian, J2ME, Windows Mobile and others) tool that makes it easy to port, update and create applications from one mobile platform to another.

MoSync removes bottlenecks in developing and deploying and allows dynamic services to be created simply.

Mobile development has never been easier and porting is history!

The solution

One source code direct to Symbian, Java and Windows Mobile

Pre-processer directivesAbstraction layerDevice analysis

Time to demo!

The Eclipse IDE

Project window

Building the project

Testing in the emulator

Demo “Simple application”

Other examples “advanced application”

With permission from with author Eric Chahi

Source interpreter

SDL stub ported in 4 hours

Porting Another World* into MoSync

* The game is known as Out of this World in the US and Outer World ( アウターワールド ) in Japan

Ruby for Symbian, Windows Mobile (and java)

Open source language

Ported in 1,5 days

A Ruby interpreter built on MoSync

“Building Ruby”

How to automatically port to hundreds of phones

The solution

Single projects vs. multiple projects

Building for many devices and OSs

Using the Finalizergenerating scripts/criteriarunning scriptdefines, pre- and post-stepsoutput structuresaved-in project

Developing for Symbian devices w/o C++

New technology means new languagesDifferent front-ends

C/C++JavaObjective CFortran/ADA/Small Talk/Erlang/new

Scripting languages (python, ruby)Different back-ends

iPhoneAndroidMoblinFlash/ECMA script/weirdnew

Download your copy today from www.mosync.com

Thank you!

Mobile Sorcery AB

Aaron Chan, business developeraaron.chan@mobilesorcery.com