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Mobile App Development on Multiple Platforms Using Titanium

Mobile App Development on Multiple Platforms Using Titanium. Campus Compass Team Student Led Seminar Adam Plisch , Brian Russell, Jonathan LeFeber. Team/Project Introduction. Project: Campus Compass Mobile App Android and iOS app for Cedarville Admissions Department

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Mobile App Development on Multiple Platforms Using Titanium

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  1. Mobile App Development on Multiple Platforms Using Titanium Campus Compass Team Student Led Seminar Adam Plisch, Brian Russell, Jonathan LeFeber

  2. Team/Project Introduction • Project: Campus Compass Mobile App • Android and iOS app for Cedarville Admissions Department • Designed to provide information about Cedarville as well as directions • Team and Roles: • Adam Plisch: • GUI guru, on-campus connections and testing • Brian Russell: • Data master, in-depth code analysis and development environment • Jonathan LeFeber: • Team leader and head of organization/communication

  3. Seminar Introduction Titanium, Difficulties with Cross-Platform Development, Handling These Difficulties

  4. Titanium Development Environment • Free-to-use multi-platform development environment • Handles multiple target OSs with (mainly) one set of code • Write your App in Javascript • Ports out to iOS, Android, Blackberry and HTML5 versions • Can be run on Mac or PC

  5. Difficulties With Cross-Platform Development • Code is being ported from Javascript to several different languages • Restricts what can be done • Functionality added with environment-specific APIs • Designing for a large variety of device configurations • Different hardware specifications and software options available depending on device • Special ways of handling platform-specific code within the development environment

  6. Handling These Difficulties • Built in functions/APIs in the development environment • Using special cases to determine available features/settings • Simplifying everything as much as possible • Can result in convoluted code

  7. Cross-Platform Development The Development Environment

  8. Requirements • iOS and Android have specific development paths and environments • Titanium works within these processes

  9. iOS • Applications built with Xcode using Objective-C • iOS SDK • iOS Simulator • Xcode obtained via Apple App Store, others obtained via Xcode • Requires OSX

  10. Android • C allowed, but limits targets • Java preferred, requires JDK • Android SDK • Android Emulator • Eclipse is endorsed Java IDE, but not necessary

  11. Titanium • Titanium uses Javascript and provides libraries with access to platform functionality • IDE with debugging capabilities on both real and virtual devices

  12. Cross-Platform Development Handling Cross-Platform Issues

  13. Differences between Android and iOS • Titanium handles most differences between iOS and Android behind the scenes, but not all of them • Titanium.Platform.name can be used in an if-statement to make platform specific decisions

  14. API Examples • Example 1: Titanium.Platform.openURL(‘tel:’+phoneNum); • Example 2: var email = Titanium.UI.createEmailDialog(); • email.open() • Example 3: var button = Titanium.UI.createButton(); • Example 4: var view = Titanium.UI.createView();

  15. Some Differences not handled by Titanium • Back button • Android’s has a back button implemented in hardware and needs no added code • iPhone requires the addition of a navigation bar at the top of your app which can include a simple back button • Gradient colors • Only supported by iOS • Set a gradient image as the background • You can review the whole API at: • http://docs.appcelerator.com/titanium/latest/#!/api/Titanium

  16. GUI • While Titanium.Platform.name allows you to separate functionality by platform, only careful planning can make a robust GUI that works on all devices • There are many different types and sizes of devices for both Android and iOS • Screen resolution and orientation provide added challenge • There are 2 different screen sizes and 3 different resolutions for iPhone, and a really wide variety for Android • Not even counting tablets!

  17. GUI – Dynamic Sizing • Titanium provides a call to get the height and width of the current platform • Titanium.Platform.displayCaps.platformWidth • Titanium.Platform.displayCaps.platformHeight • Start by dividing these values into separate views • Titanium.UI.SIZE • Titanium.UI.FILL • Each view has its own height and width and an array of children • Each child is confined to a maximum height and width of the parent view • Can contain text, images, or buttons

  18. GUI – Portrait-mode only • If your app does not support Landscape mode, you must account for what happens when your app launches from a device held in landscape mode • Your platform height and width values will be reversed • The API does not support a call to determine orientation • If height > width, portrait mode • Else, landscape mode

  19. GUI – Splash Screen • Required for all apps in iOS • Displays an image while the rest of the application loads in the background • If your portrait-mode only app is launched from a device in landscape mode, your splash screen will rotate • There is no good solution to this in Titanium • You could use a black splash screen to get around this problem

  20. GUI – Font Size • Every other aspect of a GUI is a percentage of its parent. What about font size? • A font size of 18 will use the same number of pixels on any device • Density Pixels • 1 dp should look the same relative to the rest of the GUI on any device • Javascript is not a strongly-typed language • fontsize = 18 + “dp”;

  21. Cross-Platform Deployment Getting your iOS and Android Apps compiled and out there

  22. Overall Compilation Process • Platform project is created • Javascript code is optimized • Code is either compiled or stored to be interpreted • Result is packaged and signed

  23. iOS Compilation • Javascript code compressed and included as a string in a C file • Interpreted at runtime through interpreter provided by Titanium

  24. Android Compilation • Javascript compiled to Java bytecode with Rhino • Runs directly on Android’s Dalvik VM

  25. Deployment • iOS requires distribution through App Store • Android has official Play Store, but can download apps from anywhere • Both require certified accounts • App Store has a manual review process • Play Store has automated dynamic analysis

  26. In Closing… Summary of experience, what you’ll need, where to get started

  27. Summary of Experience

  28. What You’ll Need • PC • Mac if developing for iOS • Apple Developer Account to test on iOS • Apple Developer License to deploy to App Store • Google Development License to deploy to Play Store • Testing devices • Best to have one of every type of device you plan on deploying to • iPhone, iPad, Android phone, Android tablet

  29. Where to get started • Example program • Titanium’s ‘kitchen sink’ app • Great resources to help you get started • http://docs.appcelerator.com • https://wiki.appcelerator.org • http://developer.appcelerator.com • https://developers.google.com • http://developer.android.com • http://docs.appcelerator.com/titanium/latest/#!/api/Titanium

  30. Any questions?

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