Kotlin – modern multi platform android app development

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KOTLIN – MODERN MULTI PLATFORM ANDROID APP DEVELOPMENT MOBILE APP DEVELOPMENT


Android App Development When you invent about Android App development, odds are one programming language instantly springs to mind: Java.

While it’s valid that the greater part of Android applications is composed in Java, with regards to Android app development, Java isn’t your solitary choice.

You can compose Android applications in any language that can assemble and keep running on the Java Virtual Machine (JVM), and your end clients will be unaware. What’s more, one JVM-good programming language that is truly taken the eye of the Android association is Kotlin, a statically written programming language from JetBrains.

If you’ve heard great things about Kotlin and are occupied with attempting it for yourself, at that point you’re in the correct place. In this three-section arrangement, I will share all that you have to know so as to begin utilizing Kotlin for Android development.

Kotlin is now an official language on Android. It’s expressive, compact, and powerful. Best of all, it’s interoperable with our current Android languages and runtime. Google has officially announced Kotlin as a first class language for Android.

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Modern. Expressive. Safe. It contains security features for nullability and immutability, to make your Android apps strong and performant by default.

Kotlin is the first of its kind statically wrote programming language that can be utilized for building current multi-stage applications.

Java has been the essential language for Android app development until the point when Kotlin appeared. After the coming of Kotlin, it is out of line to state ‘Java is the main or rather the best decision for development’.

For what reason Should ‘Kotlin’ be Android app Developer’s Choice?

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Kotlin app development has risen as a developing selection of organizations needing to construct one of a kind applications. 6,250 Created by JetBrains, this programming language is even-

standard software technologies and utilize many different development tools to design

minded and compact, which makes coding a fantastic affair

productive and user-friendly

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Android applications for Android smartphones and tablets.


G iven underneath are an arrangement of highlights that clarify why des igners ought to s ettle on Kotlin: Java Interoperability Familiar Syntax Less Coding Ease of Learning Concise Coding Safety Free to Use Tool-friendly

What Java has that Kotlin does not Checked exceptions Primitive types that are not classes Static members Non-private fields Wildcard-types

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What Kotlin has that Java does not Lambda expressions + Inline functions = performant custom control structures Extension functions Null-safety Smart casts String templates Properties Primary constructors First-class delegation Type inference for variable and property types Singletons Declaration-site variance & Type projections Range expressions Operator overloading Companion objects Data classes Separate interfaces for read-only and mutable collections

Print to Console

Constants and Variables

JAVA

JAVA

System.out.print("Amit Shekhar"); System.out.println("Amit Shekhar");

String name = "Amit Shekhar"; final String name = "Amit Shekhar";

KOTLIN

KOTLIN

print("Amit Shekhar") println("Amit Shekhar")

var name = "Amit Shekhar" val name = "Amit Shekhar"


Assigning the null value JAVA String otherName; otherName = null;

KOTLIN var otherName : String? otherName = null

New line in a string JAVA String text = "First Line\n" + "Second Line\n" + "Third Line";

KOTLIN val text = """ |First Line |Second Line |Third Line """.trimMargin()

Check the type and casting JAVA if (object instanceof Car) { } Car car = (Car) object;

KOTLIN if (object is Car) { } var car = object as Car

Concatenation of strings JAVA String firstName = "Amit"; String lastName = "Shekhar"; String message = "My name is: " + firstName + " " + lastName;

KOTLIN val firstName = "Amit" val lastName = "Shekhar" val message = "My name is: $firstName $lastName"

Ternary Operations JAVA String text = x > 5 ? "x > 5" : "x <= 5"; String message = null; log(message != null ? message : "");

KOTLIN val text = if (x > 5) "x > 5" else "x <= 5" val message: String? = null log(message ?: "")

Splitting arrays JAVA String[] splits = "param=car".split("="); String param = splits[0]; String value = splits[1];

KOTLIN val (param, value) = "param=car".split("=")


Multiple conditions

Defining methods JAVA

JAVA

void doSomething() { // logic here }

if (score >= 0 && score <= 300) { }

KOTLIN

if (score in 0..300) { }

KOTLIN

fun doSomething() { // logic here }

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