How to Call Kotlin Activity from Java Activity: A Step-by-Step Guide

Are you looking for a guide on how to call Kotlin activity from Java activity? Kotlin is a programming language that has gained popularity among developers due to its interoperability with Java. In this article, we will provide you with a step-by-step guide on how to call Kotlin activity from Java activity.

Before we dive into the guide, let’s get a quick overview of the two programming languages.

What is Kotlin?

Kotlin is a statically typed programming language that runs on the Java Virtual Machine (JVM). It was created by JetBrains in 2011 and officially released in 2016. Kotlin was designed to be a better version of Java, with more concise and expressive syntax, improved type inference, null safety, and better support for functional programming.

What is Java?

Java is a widely-used programming language that has been around since the 1990s. It was created by James Gosling at Sun Microsystems and later acquired by Oracle. Java is an object-oriented language that is used to develop a wide range of applications, including desktop, web, and mobile applications.

Now that we have a basic understanding of Kotlin and Java, let’s get started with our guide on how to call Kotlin activity from Java activity.

Step 1: Create a Kotlin Activity

The first step is to create a new Kotlin activity. To do this, go to File → New → Kotlin File/Class and select "Activity" from the drop-down menu. Give the activity a name and click "Create".

Step 2: Add Code to the Kotlin Activity

Next, you need to add some code to the Kotlin activity. In the onCreate() method, add the following code:

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    setContentView(R.layout.activity_kotlin)
}

This code sets the content view to the activity_kotlin layout, which you can create by going to res → layout → activity_kotlin.xml.

Step 3: Create a Java Activity

Now, it’s time to create a Java activity. To do this, go to File → New → Java File/Class and select "Activity" from the drop-down menu. Give the activity a name and click "Create".

Step 4: Add Code to the Java Activity

In the Java activity, you need to add some code to call the Kotlin activity. To do this, add the following code to the onCreate() method:

Intent intent = new Intent(this, KotlinActivity.class);
startActivity(intent);

This code creates a new intent and starts the Kotlin activity. Make sure to replace "KotlinActivity" with the name of your Kotlin activity.

Step 5: Add Kotlin to the Build File

The next step is to add Kotlin to the build file. To do this, go to the build.gradle file for your app and add the following code:

implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"

This code adds the Kotlin standard library to your project. Make sure to replace "$kotlin_version" with the version of Kotlin you are using.

Step 6: Sync and Run the App

Finally, sync your project and run the app. You should see the Kotlin activity being called from the Java activity.

Congratulations, you have successfully called Kotlin activity from Java activity!

Final Thoughts

In this article, we have provided you with a step-by-step guide on how to call Kotlin activity from Java activity. Kotlin is a powerful programming language that can be used alongside Java to develop high-quality Android applications. By following the steps outlined in this guide, you can easily integrate Kotlin into your Java-based projects. Remember to always keep your code organized and easy to understand, and happy coding!

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