Cross Platform Development & Porting
MobFest February 2009
Aaron Chan
Business Developer
Wednesday, March 18, 2009

The causes
What causes fragmentation?
The Fragmentation Problem
Wednesday, March 18, 2009

The causes
What causes fragmentation?
Why fragmentation?
Hardware dierences, models & markets
Verification of handsets /java
New JSRs and APIs
The speed of the standards process
Manufacturer dierentiation
Handset customization
Handset variation & language dierences
Wednesday, March 18, 2009

How deal with fragmentation (1)
How to to deal with
Strategies
fragmentation
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
Wednesday, March 18, 2009

Strategies
Or use transcoding
B) The transcoding method
Create reference versions
Create 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
Wednesday, March 18, 2009

Strategies
Or transform
C) Advanced compiler technology
Make the code:
Transformable
able to carry out complex analysis
able to perform static checks
form 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!
Wednesday, March 18, 2009

The solution
MoSync a cross platform
MoSync (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!
Wednesday, March 18, 2009

One source code direct to
Symbian, Java and Windows
Mobile
Pre-processer directives
Abstraction layer
Device analysis
 Time to demo!
Wednesday, March 18, 2009

Demo “Simple application”
The Eclipse IDE
Project window
Building the project
Testing in the emulator
Wednesday, March 18, 2009

Other examples “advanced
application”
Porting Another World* into MoSync
With permission from with author
Eric Chahi
Source interpreter
SDL stub ported in 4 hours
* The game is known as
Out of this World in the
US and Outer World (
) in Japan
Wednesday, March 18, 2009

“Building Ruby”
A Ruby interpreter built on MoSync
Ruby for Symbian, Windows Mobile
(and java)
Open source language
Ported in 1,5 days
Wednesday, March 18, 2009

The solution
How to automatically port
to hundreds of phones
Single projects vs. multiple projects
Building for many devices and OSs
Using the Finalizer
generating scripts/criteria
running script
defines, pre- and post-steps
output structure
saved-in project
Wednesday, March 18, 2009

Developing for Symbian
devices w/o C++
New technology means new
languages
Dierent front-ends
C/C++
Java
Objective C
Fortran/ADA/Small Talk/Erlang/
new
Scripting languages (python, ruby)
Dierent back-ends
iPhone
Android
Moblin
Flash/ECMA script/weird
new
Wednesday, March 18, 2009

Thank you!
Mobile Sorcery AB
Aaron Chan, business developer
aaron.chan@mobilesorcery.com
Download your copy today from
www.mosync.com
Wednesday, March 18, 2009