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Develop native android appsAnd port to other platforms
Robin Puthli, 24 October 2013
Droidcon UK
1donderdag 24 oktober 13
• Mobile developer 2001 - present
• Run a 11 strong development shop
• Netherlands based
Me
2donderdag 24 oktober 13
Native iOS
Native Android Mobile webapps
Mobile websites
Itude Mobile develops client facing apps for companies
3donderdag 24 oktober 13
Agenda
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Agenda
• Why is it difficult to port native apps?
4donderdag 24 oktober 13
Agenda
• Why is it difficult to port native apps?
• How to cope
4donderdag 24 oktober 13
Agenda
• Why is it difficult to port native apps?
• How to cope
• We are making our tools open source
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The problem
5donderdag 24 oktober 13
The problem
Tools
ProgrammingLanguage Java / C++ NDK Objc, C++, C C#
App LifecycleApp Structure
UI, UXWidgets
Search boxBackground
PassbookBack button Tiles
5donderdag 24 oktober 13
The problem
Tools
ProgrammingLanguage Java / C++ NDK Objc, C++, C C#
App LifecycleApp Structure
UI, UXWidgets
Search boxBackground
PassbookBack button Tiles
Is called device fragmentation
5donderdag 24 oktober 13
6donderdag 24 oktober 13
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Android
www.opensignals.com
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Fragmentation is here to stay
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Fragmentation is here to stay
• 2009 - 2011 : convergence
• Manufacturers are differentiating
• Phones, phablets, tablets, watches, glasses
• Learn how to cope!
• In all stages of the process
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Old problem!
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Old problem!
• Windows / Mac / Unix
• Desktop browsers
• JavaME
• Mobile web
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9 strategies
Damith C. Rajapakse, Singapore school of computing (2006)
Cost
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Examples
Damith C. Rajapakse, Singapore school of computing (2006)
PhoneGap
Action bar sherlock
Native Android and iOS
Qt, Unity
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If you’ve got a hammer
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If you’ve got a hammer
Everything looks like a nail
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What is your use case?
• Game maker
• Single platform specialist
• Multiplatform developer
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Our strategy:mobbl.org
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Our strategy:mobbl.org
• Software Engineering Methodology
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Our strategy:mobbl.org
• Software Engineering Methodology
• Native libraries for Android, JSF and iOS
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Our strategy:mobbl.org
• Software Engineering Methodology
• Native libraries for Android, JSF and iOS
• Open source Q4 2013
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Use case
• Data centric apps
• Lot of emphasis on look and feel
• Security, performance
• Often asked to develop on one platform first, then another platform.
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Data lifecycle
1. JSON or XML from a companies webservice
2. Parse and validate
3. Cache
4. Present on some screens
5. Change
6. Post back to the webservice
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We tried
• HTML5 in webviews
• Javascript based tools
• Tools with a proprietary language
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We tried
• HTML5 in webviews
• Javascript based tools
• Tools with a proprietary language
• Buggy - write once, debug everywhere
• Memory leaks
• Mediocre UI
• No developers
• No cost advantage over native
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Goals
• Native languages
• Predictable, efficient porting effort
• Modular code for easy maintenance
• Re-use for regular tasks: caching, REST, sessions etc
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Concepts
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Model
Document • Parsers and serialization
• Webservices
• Persistence, Caching
• Manipulation, deep copy etc.
• Passthrough between screens
Element
Attribute
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Controller
Screen A
Button
Screen B
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Controller
Screen A
Button
Screen B
Logic
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Controller
Screen A
Button
Screen B
Logic
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Controller
Screen A
Button
Screen B
Logic
Activity
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Controller
Screen A
Button
Controller Screen B
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Controller
Screen A
Button
Controller Screen B
Logic
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MOBBL
ModelController
View
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Re-use
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MOBBL.ORG
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Questions?✓Code Android apps in java
✓No API restrictions
✓Port to other platforms
✓open source q4 2013
✓Sign up now to hear more
MOBBL.ORG
29donderdag 24 oktober 13
