Android Development With Kotlin

Transcript

1. Android Development in Kotlin Daniel Tunde Ojediran Software Engineer @ Venture Garden Group @danieltundeoje
2. A statically typed programming language that runs on JVM, Android and the browser Kotlin
3. Why Kotlin?
4. Why Kotlin? 100% interoperable with Java Once, both Java and Kotlin codes are compiled, it is difficult to tell which parts of the project is written in Kotlin or Java Also, you will be able to make use of majority of Java libraries and frameworks in your Kotlin projects
5. Why Kotlin? Modern. Expressive. Safe. Kotlin is concise while being expressive. It contains safety features for nullability and immutability, to make your Android apps healthy and performant by default
6. Why Kotlin? Non-null by default
7. Why Kotlin? More Concise Code Comparing a Java class and Kotlin Class that produce the same results, you will observe that the one written in Kotlin is more compact and concise than the Java equivalent. So Kotlin is good at reducing the amount of boilerplate code you need to write
8. Why Kotlin?
9. Why Kotlin? Easy Learning Curve Kotlin is designed to have an easy learning curve so if you have written As a java developer, you will find out that most of the Kotlin syntax feels familiar
10. Why Kotlin? First Class Android Studio Support Kotlin in developed by Jetbrains, the company also behind Android Studio. So it is quite easy configuring Kotlin in your project.
11. The Not-so-Good
12. The Not-So-Good Extra Runtime Size (~800kb) The Kotlin Standard Library and runtime will increase the size of your apk at about 800kb
13. The Not-So-Good Initial Readability of Code Although Kotlin’s concise syntax is one of the language’s greatest strengths. It may be a bit difficult to decipher since a lot is going on under the curtain for a small amount of code
14. Kotlin Syntax
15. Functions
16. Variable Declaration
17. Extension Functions Extension functions are functions that, as the name implies, help us to extend the functionality of classes without having to touch their code.
18. Extension Functions e.g, inflating a view in an adapter Give power to the ViewGroup Usage
19. ‘when’ replaces ‘switch’
20. ‘when’ replaces ‘switch’
21. Ranges
22. Data Classes Vs POJOs
23. Data Classes Vs POJOs
24. https://kotlinlang.org/docs/tutorials/koans.html Edutools plugin https://developer.android.com/kotlin/ https://kotlinlang.org/docs/books.html https://www.udacity.com/course/kotlin-bootcamp-for- programmers--ud9011 Resources https://github.com/mcxiaoke/awesome-kotlin
25. Questions?
26. Merci! @danieltundeoje tundeojediran