Sharing Code Between iOS & Android

Transcript

1. © Coiney, Inc. !1
2. © Coiney, Inc. Sharing Code Between iOS & Android Ken Myers iOS Developer at Coiney !2
3. © Coiney, Inc. !3
4. Commands Responses !4 App Terminal • Commands & responses are byte sequences sent over Bluetooth • Driver generates commands & parses responses • Developed in-house
5. © Coiney, Inc. FeliCa Support Coming This Year !5 But...
6. © Coiney, Inc. Problems With Previous Setup • Separate Objective-C & Java implementations • Functional discrepancies • Have to maintain two separate implementations • Lots of technical debt • Limited resources !6
7. © Coiney, Inc. What we did • Implement a C++ library with Objective-C & Java APIs • For iOS, wrap in a Cocoa Touch Framework • For Android, write a JNI layer !7
8. © Coiney, Inc. !8 iOS App Android App C++ Library Cocoa Touch Framework JNI
9. © Coiney, Inc. !9 App Cocoa Touch Framework Glue Layer .h .mm C++ Lib iOS Interface
10. © hey, Inc. Made with fun. !10
11. © Coiney, Inc. !11 App JNI C++ Library Android Interface
12. © hey, Inc. Made with fun. !12 package com.coiney.commonmpi object CMCommand { init { System.loadLibrary("native-mpi") } @JvmStatic external fun createDisplayImage(fileName: String): ByteArray @JvmStatic external fun createDisplayMedia(fileName: String, offsetX: Int, offsetY: Int): ByteArray @JvmStatic external fun createStartNFC(): ByteArray @JvmStatic external fun createStopNFC(): ByteArray @JvmStatic external fun createFlashLED( led1: Boolean, led2: Boolean, led3: Boolean, led4: Boolean ): ByteArray @JvmStatic external fun createIlluminateLED( led1: Boolean, led2: Boolean, led3: Boolean,
13. © Coiney, Inc. Challenges • Coming up with a clean API • Objective-C • JNI • Comprehensive unit tests with CI !13
14. © Coiney, Inc. Conclusion • Team members gained C++ experience • Improved modularity • Unit tests improved quality !14
15. © Coiney, Inc. We're Hiring iOS Developers! !15