Android development powered by Java SE 8 and Kotlin
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If you are an Android developer, an experienced Java developer looking to take your mobile applications to the next level, so this session is for you. Starting from Android N which is the next version of Google's blockbuster operating system for mobile devices. Developers can experiment with the new features and capabilities of the operating system powered by Java SE 8 and Kotlin, I will also touch the new Desugar compiler designed for Java SE 8 support and programming with Java SE 8 syntax; lambda expression, method reference, default methods, Streams... etc. Github project @ https://github.com/mohamed-taman/Android_with_JavaSE8_Kotlin
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Android development powered by Java SE 8 and Kotlin
- 1. ANDROID DEVELOPMENT POWERED BY KOTLIN & JAVA SE 8 MOHAMED TAMAN @_TAMANM JAVA CHAMPION Unleash the Dragon
- 2. BIOGRAPHY Java Champion, and Java Geek Enterprise Architect / Innovation & R&D Sr. Manager @efinance Mobile/Web/Blockchain/HashGraph/Cloud/DevOps/Big Data/IoT JCP (Won Dukes choice award 2013, 2014, 2015) Speaks Java (Won Outstanding adopt-a-jsr participant 2013 JCP annual award) International Speaker Author (JavaFX 8 essentials, and upcoming Mastering JDK 9 Video training for Packt and Lynda.com) Mohamed Taman @_tamanm
- 3. REACH ME ON @_tamanm http://eg.linkedin.com/in/mohamedtaman/ https://www.facebook.com/mohamed.m.taman.7 (Mohamed Mahmoud Taman) http://tamanmohamed.blogspot.com
- 4. AGENDA Why Java SE 8? Android Development and Java SE 8 Start using supported Java 8 Live Demo Mohamed Taman @_tamanm
- 5. WHY JAVA SE 8? Mohamed Taman @_tamanm
- 6. JAVA SE 8 Java Platform, Standard Edition 8 is a major feature release, since Java SE 5 release. Mohamed Taman @_tamanm
- 7. BRINGS Functional Programming to the language, like others Kotlin, Scala, Groovy,.. and other languages Mohamed Taman @_tamanm
- 8. FUNCTIONAL PROGRAMMING By introducing Lambda Expressions Mohamed Taman @_tamanm
- 9. LAMBDA EXPRESSION SYNTAX Mohamed Taman @_tamanm
- 10. WHAT'S NEW IN JDK 8 Lambda Expressions (Covered already) Method references Default and static interface methods Streams & Collections For more: Mohamed Taman @_tamanm Supported by Android development https://developer.android.com/studio/preview/features/java8-support.html#supported_features
- 11. QUICK LIVE DEMO Mohamed Taman @_tamanm http://www.oracle.com/technetwork/java/javase/8-whats-new-2157071.html
- 12. ANDROID DEVELOPMENT AND JAVA SE 8 Mohamed Taman @_tamanm
- 13. USE JAVA 8 LANGUAGE FEATURES Android Studio 2.4 Preview 4 and later supports all Java SE 7 language features. And a subset of Java SE 8 language features. Mohamed Taman @_tamanm Note: When developing apps for Android, using Java 8 language features, is optional.
- 14. DESUGAR TOOLCHAIN Is the default toolchain for new Android Studio 2.4+ Mohamed Taman @_tamanm .java .class .class (desugared) .dex javac dexdesugar Third party library Java 8 language feature support using desugar bytecode transformations.
- 15. START USING SUPPORTED JAVA 8 Mohamed Taman @_tamanm
- 16. UPDATE GRADLE PLUGIN Update the Android plugin to 2.4.0 (or higher), you can use latest Gradle v3.5. Add the following to your modules build.gradle file Mohamed Taman @_tamanm android { ... compileOptions { sourceCompatibility JavaVersion.VERSION_1_8 targetCompatibility JavaVersion.VERSION_1_8 } }
- 17. API VERSION, VM IMAGE, & TOOLS Update API to API level 24 or higher. minSdkVersion (24) is Noga Android N or higher should be installed. Intel x86 atom System image of Noga SDK. Latest build and platform tools v24.0.0+. Google Repository v24 or later. Intel x86 emulator accelerator (HAXM installer) latest version. Mohamed Taman @_tamanm
- 18. WHY KOTLIN? Mohamed Taman @_tamanm Statically typed programming language for modern multiplatform applications
- 19. KOTLIN IS Concise; Drastically reduce the amount of boilerplate code. Safe; Avoid entire classes of errors such as null pointer exceptions. Interoperable; Leverage existing libraries for the JVM, Android, and the browser. Tool friendly; Choose any Java IDE or build from the command line. For more: Mohamed Taman @_tamanm Now official on Android https://kotlinlang.org
- 20. LIVE DEMO Mohamed Taman @_tamanm
Editor's Notes
- #9: Lambda Expressions ------------------------------ A new language feature, has been introduced in this release. They enable you to treat functionality as a method argument, or code as data. Lambda expressions let you express instances of single-method interfaces (referred to as functional interfaces) more compactly.
- #11: Method references --------------------------- Provide easy-to-read lambda expressions for methods that already have a name. Default and static methods: -------------------------------------- Enable new functionality to be added to the interfaces of libraries and ensure binary compatibility with code written for older versions of those interfaces. Collections and Streams: -------------------------------------- Classes in the new油java.util.stream油package provide a Stream API to support functional-style operations on streams of elements. The Stream API is integrated into the Collections API, which enables bulk operations on collections, such as sequential or parallel map-reduce transformations.
- #14: Note:油When developing apps for Android, using Java 8 language features is optional. You can keep your project's source and target compatibility values set to Java 7, but you still need to compile using JDK 8.
- #15: Android Studio now provides built-in support for using certain Java 8 language features and third-party libraries that use them. The default toolchain called油desugar implements the new language features by performing bytecode transformations on the output of the油javac油compiler.