What is Kotlin Multiplaform? Why & How?
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The document outlines the professional background and expertise of Shady Yehia Selim, a senior software engineer with 20 years of experience in web and mobile development, highlighting key roles and projects including founding tech groups and public speaking. It details various programming languages and frameworks, particularly Kotlin and Jetpack Compose, emphasizing their features and benefits for app development. Additionally, it introduces Flutter and SwiftUI as modern frameworks that enhance development speed, performance, and design capabilities.
What is Kotlin Multiplaform? Why & How?
- 2. ● 20 years of experience in web and mobile development ● Mobile & Web Evangelist ● Technology savvy ● Think tank ● UI/UX freak ● ● Public Speaker, 2015 ● GDG Helwan Founder & Leader, 2017 ● Kotlin Cairo User Group Founder & Leader, 2017 ● Mentor & Tester in Udacity Nanodegree, 2017 ● Andela Senior Software Engineer, 2019 2 Speaker Bio
- 3. • Native iOS and Android Languages • Cross Mobile Languages • What is Kotlin? • Jetpack Compose • SwiftUI • Kotlin/Native 3 Index
- 4. 4 Mobile OS
- 5. Linux Kernel and Device Drivers Core OS Core Services & Media Cupertino Widget Linux Kernel and Device Drivers Libraries & Run Time Applications & Framework Material Design Widgets
- 6. iOS Android
- 7. Native Approach (Single Platform) Swift Kotlin
- 8. OEM Widgets Cupertino Material Design Canvas Events Location Bluetooth Camera Sensors Java Kotlin Swift Objective-c Application Services OEM SDKs
- 11. Class A Class B Popular Cross Tools
- 12. Web View Canvas Events Location Bluetooth Camera Sensors JavaScript HTML CSS Application Services Bridge Class A
- 13. Canvas Events Location Bluetooth Camera Sensors Transferred Native Code Application Services FrameworklibrariesSDK OEM Widgets Cupertino Material Design Class B
- 14. Canvas Events Location Bluetooth Camera Sensors Native ARM Binary Code Application Services Platform Channels Flutter Widgets Cupertino Material Design Flutter Approach
- 15. So what is Flutter ? Flutter is the next step in App development Speed and performance Fast , smooth performance Flexibility Customize anything - Brand first design Native look and feel Familiarity , ease of use Rapid Development Easy to learn , predictable
- 16. Great looking and Fast Animation
- 18. Kotlin History ⬝ Created by Jetbrains on 2011 ⬝ Open sourced on 2012 ⬝ Reached version 1 on 2016 ⬝ Adopted by Google on 2017 ⬝ Google announce Kotlin as 1st Class language on 2017 ⬝ Google announce Android Kotlin 1st language on 2019
- 19. Kotlin is ⬝ Statically typed programming language targeting the JVM ⬝ Support for functional and OO paradigms ⬝ Pragmatic, safe, concise, great Java interop ⬝ Free and open-source ⬝ Drastically reduces the amount of boilerplate code ⬝ Having Lambda expression ⬝ Avoids entire classes of errors such as null pointer exceptions ⬝ Supported by Google
- 20. Kotlin Strength ⬝ Modeling the data of your application concisely and expressively ⬝ Creating reusable abstractions using functional programming techniques ⬝ Creating expressive domain-specific languages (DSL) ⬝ Java interop ensures that all existing Java frameworks can be used ⬝ No rewrite required to start using Kotlin in existing codebase ⬝ Existing investment is fully preserved
- 22. Jetpack Compose @Composable fun Greeting(name: String) { Text (text = "Hello $name!") } @Preview @Composable fun PreviewGreeting() { Greeting("Android") }
- 23. Jetpack Compose Benefits ⬝ Build with the benefits that Kotlin brings -- concise, safe, and fully interoperable with the Java programming language. Designed to drastically reduce the amount of boilerplate code you have to write, so you can focus on your app code, and help avoid entire classes of errors. ⬝ Fully declarative for defining UI components, including drawing and creating custom layouts. Simply describe your UI as a set of composable functions, and the framework handles UI optimizations and updates to the view hierarchy under the hood.
- 24. Jetpack Compose Benefits -2 ⬝ Provide reusable building blocks that let you build custom widgets easier, and without starting from scratch. ⬝ Compatible with existing views so you can mix and match and adopt at your own pace with direct access to all of the Android and Jetpack APIs. ⬝ Material Design out of the box and animations from the start, so it’s easy to create beautiful apps that are full of motion. ⬝ Accelerate development with tools like live preview and apply changes.
- 25. SwiftUI 25
- 26. SwiftUI
- 27. SwiftUI Benefits ⬝ Declarative Syntax ⬝ Design Tools ⬝ Native on All Apple Platforms ⬝ Easy to read and natural to write ⬝ Works seamlessly with new Xcode design tools to keep your code and design perfectly in sync ⬝ Automatic support for Dynamic Type, Dark Mode, localization, and accessibility
- 28. Kotlin/Native 28
- 29. Kotlin/Native ⬝ An SDK, not a framework ⬝ Reuse your business logic ⬝ Smooth interoperability with platform-specific code ⬝ Have a native UI ⬝ No lagging behind native platforms ⬝ Use the language you already know and love
- 30. 1 Code base, 2 platforms
- 31. Resources and samples ⬝ Main Page https://www.jetbrains.com/lp/mobilecrossplatform/ ⬝ Samples https://github.com/JetBrains/kotlin-native/tree/master/samples ⬝ Minimal Projects https://github.com/joreilly/PeopleInSpace https://johnoreilly.dev/2019/06/08/swiftui-meetings-kotlin- multiplatform.html ⬝ MVVM Project Template https://moko.icerock.dev/
- 32. Codelabs and Workshop ⬝ https://play.kotlinlang.org/hands- on/Targeting%20iOS%20and%20Android%20with%20Kotlin%2 0Multiplatform/ ⬝ https://www.raywenderlich.com/1022411-kotlin-multiplatform- project-for-android-and-ios-getting-started
- 34. Cairo, Egypt Shady Yehia Selim /Shady-Selim /ShadySelim Senior Software Engineer @dr_Shady_Selim