Cross-Platform Native Apps in Java (budapest.mobile)

MIGERAN - SMART SOFTWARE SOLUTIONS
CROSS-PLATFORM
NATIVE APPS IN JAVA
An Introduction to the Intel Multi-OS Engine
Dr. Annamária Mattasits
CEO / Co-Founder
Gergely Kis
CTO / Co-Founder

A TASTE OF MOE
Graffiti VR - Cross-Platform Virtual Reality App In Java
2

INTRODUCTION
• We started at Siemens - C65 and X75 generations
• Started our company in 2007
• Outsourced Software Development
• Diverse Projects
• Mobile App & Platform Development
• Android, iOS, BB10, BB Classic, J2ME
• Embedded Linux: C/C++, Asm on ARM, MIPS
• Web / Server: Java EE
• Built on Teleworking
Mobile Development since 2004
3

THE MOBILE CHALLENGE
Target multiple platforms
4
Source: Vision Mobile

THE MOBILE CHALLENGE
Deploy the same app on multiple platforms
5
Rewrite from Scratch Go Cross-Platform

GO CROSS-PLATFORM
The Quest for the ONE TRUE Platform
6

GO CROSS-PLATFORM
6
JavaScript

GO CROSS-PLATFORM
6
JavaScript
Web App in
a Box

GO CROSS-PLATFORM
6
JavaScript
Web App in
a Box Native UI

GO CROSS-PLATFORM
6
JavaScript
Web App in
a Box Native UI
React Native Titanium

GO CROSS-PLATFORM
6
JavaScript C# (.NET)
Web App in
a Box Native UI

GO CROSS-PLATFORM
6
JavaScript C# (.NET)
Web App in
a Box Native UI
Xamarin

GO CROSS-PLATFORM
6
JavaScript C# (.NET) Java
Web App in
a Box Native UI
Xamarin

GO CROSS-PLATFORM
6
Web App in
a Box Native UI
Xamarin RoboVM

GO CROSS-PLATFORM
6
Web App in
a Box Native UI
Xamarin RoboVM Codename One

GO CROSS-PLATFORM
6
Web App in
a Box Native UI
Intel MOE

GO CROSS-PLATFORM
6
Web App in
a Box Native UI
Intel MOE
Intel XDK

OUR CHOICE: USE JAVA
• Most of our codebase was in Java
• J2ME, Classic BlackBerry, Android
• Java is native on Android
• Don't like reinventing the wheel...and debugging
it all over again
• Native UI
• Customers did not like Cross-Platform UIs
• Great development tools
• Debugger, IDEs, Native API access, UI Designer
And design apps The Right WayTM
7
Business Logic (Model)
View Model
User Interface
Platform Dependent
Native View

THE BIRTH OF MIGERAN FOR IOS
Migeran for iOS was our ﬁrst own Product
8
Migeran for iOS
• Since 2009, we used XMLVM
• Migeran Development started in 2013
• Runtime based on Android ART
• Nat/J
• Java to native bindings with automated generator
• Full iOS API mapping
• Eclipse and later Android Studio / IDEA integration
• First public release at the end of 2014
• In 2015 Intel acquired Migeran for iOS and it is now part
of the Intel Multi-OS Engine

THE BIRTH OF MIGERAN FOR IOS
Migeran for iOS was our ﬁrst own Product
8
Migeran for iOS
• Since 2009, we used XMLVM
• Migeran Development started in 2013
• Runtime based on Android ART
• Nat/J
• Java to native bindings with automated generator
• Full iOS API mapping
• Eclipse and later Android Studio / IDEA integration
• First public release at the end of 2014
• In 2015 Intel acquired Migeran for iOS and it is now part
of the Intel Multi-OS Engine
Migeran is now
Intel Partner

INTEL MULTI-OS ENGINE
End to End Solution for Cross-Platform Java Development
9
Java runtime based on Android ART
Mac and Windows Host Support
with On Device Debugging
Nat/J Java to native bindings
with automated binding generator
100% Objective-C API Access
Use Xcode Storyboard Integration
or iOS Designer in Android Studio

TIME SAVINGS WITH INTEL MOE
Top 25 Non-Game Apps in Google Play - Bubble Size Relative to Lines-of-Code
10
0
1
2
3
4
5
6
7
8
0% 10% 20% 30% 40% 50% 60% 70% 80% 90%
Developer-YearsofEffort
Portable - Directly Reusable Code (full app)
Potential to save years of
development effort

MIGERAN ANALYZER
Is your Android App Ready for iOS?
11
analyzer.migeran.com

INTEL MOE PERFORMANCE
Intel MOE vs. Objective-C
12
Intel MOE Objective-C
Time: 16 sec
Memory: 781 MB
Time: 40 sec
Memory: 1 GB
Allocates array of 10M elements,
each element is a 10 letter random string

Java Performance Comparison
13
Execution time (ms)
iPad 2
iPad mini (1st generation, 32-bit
Apple A5)
Robo VM Intel MOE CodeName One Robo VM Intel MOE
Average Average Average Average Average
binarytrees 60 150 463 407 157
chameneosredux 5911 763 27123 7024 1162
fasta 263 455 1906 530 651
fannkuchredux 2425 2157 10233 4351 4080
mandelbrot 426 450 4981 811 1127
meteor 2365 2497 15705 4530 4278
nbody 1616 1342 12752 2799 2715
pidigits 275 685 1712 1161 990

Performance and Heap Memory Comparison
14
Performance Memory
Intel MOE 58,76 fps 4,85 M
RoboVM 56,90 fps 7,23 M
Difference % 3,2% 61%
LibGDX RoboMission game on iPad Mini 32 bit

NAT/J - JAVA TO NATIVE BINDING
• Java to native bindings deﬁned using Java annotations
• C and Objective-C runtimes supported
• Manages Objective-C object lifecycle
• Dynamically links Java and native functions
• Automatic binding generator
• The full iOS API is automatically generated
• Bind Objective-C ViewController stubs to Java
• Generate bindings for 3rd party Objective-C and Swift libraries
• Works on any JNI compatible Java VM (Oracle, ART ...)
Never use JNI Again!
15

NAT/J - JAVA TO NATIVE BINDING
Binding Generator in Action
16

XCODE STORYBOARD INTEGRATION
Design in Xcode, Develop in Java
17
Generated user interface
binding methods

DESIGN IOS UI IN ANDROID STUDIO
Generates iOS Storyboard during build
18

ADVANCED JAVA & NATIVE INTEGRATION
• Use any JVM language (Scala, Kotlin, Clojure ... etc.)
• Use Java libraries from Objective-C and Swift code
through simple Objective-C wrappers
• Implement Objective-C protocols in Java
• Extend Objective-C classes in Java
• Build your UI in Swift or Objective-C
• Automatically generate bindings with Nat/J
• Use Xcode or Android Studio as required
Use the tools best suited for the task
19
Java Class
Objective-C
Protocol
Objective-C
Class
<<extends>> <<implements>>
Native UI
Objective-C
Class
<<uses>>

ADVANCED JAVA & NATIVE INTEGRATION
• Use any JVM language (Scala, Kotlin, Clojure ... etc.)
• Use Java libraries from Objective-C and Swift code
through simple Objective-C wrappers
• Implement Objective-C protocols in Java
• Extend Objective-C classes in Java
• Build your UI in Swift or Objective-C
• Automatically generate bindings with Nat/J
• Use Xcode or Android Studio as required
Use the tools best suited for the task
19
Java Class
Objective-C
Protocol
Objective-C
Class
<<extends>> <<implements>>
Native UI
Objective-C
Class
<<uses>>
Debug Java & Native
code at the same time

DEVELOP IOS APPS ON WINDOWS
Cloud Build Service
20
AppCenter
Storage
DB Java iOS Build
Server
(Mac OS X, Xcode)
Java Android
Build Server
(Linux, Android SDK)
Upload source code
Download app
Request build
Poll for build status
Record build transaction
Maintain build status
Java Android
Build Server
(Linux, Android SDK)
Java iOS Build
Server
(Mac OS X, Xcode)
Download source
Upload app
Build request
Build status(s)
Compilation
using native tools
Intel SSO
Authenticate user
Uses the Intel XDK Cloud
Build Infrastructure

MIGRATING FROM ROBOVM
• LibGDX already announced that they are switching to MOE
• Their experimental MOE based backend is already available
• RoboVM's features are available on Intel MOE
• e.g. RoboVM's Bro can be easily replaced through Nat/J
RoboVM was shut down by Microsoft
21

MIGRATING FROM ROBOVM
• LibGDX already announced that they are switching to MOE
• Their experimental MOE based backend is already available
• RoboVM's features are available on Intel MOE
• e.g. RoboVM's Bro can be easily replaced through Nat/J
RoboVM was shut down by Microsoft
21
DEMO TIME

RESOURCES
• Website: https://software.intel.com/multi-os-engine
• Sample applications:
• Java to native samples: https://github.com/migeran/moe-objc-java-samples
• Java: https://github.com/moe-java-samples/moe-java-samples
• Kotlin: https://github.com/moe-java-samples/moe-kotlin-samples
• Tech forum: https://software.intel.com/en-us/forums/multi-os-engine
• Tutorials and getting started guides:
• https://software.intel.com/en-us/blogs/2015/08/27/tutorials-and-quick-start-guides-for-multi-os-engine
• Video and Webinars:
• https://software.intel.com/en-us/articles/videos-and-webinars-multi-os-engine
Get Started Today
22

Q & A
Thank you for your attention!
23
TRAINING PREMIUM SUPPORT DEVELOPMENT
WE ARE HIRING!
INTERNS WELCOME!
migeran.com
GET INTEL MULTI-OS ENGINE
https://software.intel.com/multi-os-engine

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