How to Set Up Android Studio for Kotlin on Ubuntu 24.04

Now that Java is set up, let’s install Android Studio by manually downloading the tar file from the official Android Studio website.

After the download is complete, navigate to the directory where the .tar.gz file is located and use the following commands to install it.

tar -xvf android-studio-*-linux.tar.gz
sudo mv android-studio /opt/

To launch Android Studio, navigate to the bin directory inside the Android Studio directory.

cd /opt/android-studio/bin
./studio.sh

This will open Android Studio, which will prompt you to complete the initial setup, including downloading the necessary SDK packages.

Follow the on-screen instructions to complete the setup.

Step 2: Installing Kotlin in Android Studio for Project

Android Studio comes with Kotlin support built-in, but you may need to enable it manually on your new project.

• Open Android Studio and click on New Project from the welcome screen.
• Choose a project template, we will use the Empty Activity template, which is a simple starting point for any Android app.
• Configure your project and make sure to choose Kotlin from the drop-down list, which tells Android Studio to use Kotlin for your project.

Android Studio will now create your project, and it might take a few moments to sync and download the necessary dependencies. Once your project is created, you will see several files and folders.

Step 3: Writing Your First Kotlin Code

Now that your project is set up, let’s add some Kotlin code to display a simple “Hello, World!” message on the screen.

Open the MainActivity.kt file, here you will see a default MainActivity class that extends AppCompatActivity, which looks like this:

package com.example.tecmint

import android.os.Bundle
import androidx.appcompat.app.AppCompatActivity

class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
    }
}

Let’s modify this code to display a “Hello, World!” message using a TextView. First, open the activity_main.xml file and add the following code inside the <RelativeLayout> tags:

<TextView
    android:id="@+id/helloText"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Hello, World!"
    android:textSize="24sp"
    android:layout_centerInParent="true"/>

Now, go back to MainActivity.kt and update the code to reference the TextView we just added:

import android.os.Bundle
import androidx.appcompat.app.AppCompatActivity

class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        val helloText = findViewById<TextView>(R.id.helloText)
        helloText.text = "Hello, World!"
    }
}

This code finds the TextView by its ID and sets its text to “Hello, World!”.

Step 4: Running Your First Kotlin Project

You are now ready to run your app and see the “Hello, World!” message on your Android device or emulator.

Setting Up an Emulator

If you don’t have a physical Android device, you can use the Android Emulator to run your app.

• Click on the AVD Manager icon in the toolbar (it looks like a phone).
• Click Create Virtual Device.
• Choose a device, such as the Pixel 4, and click Next.
• Select a system image (e.g., Android 11) and click Next.
• Click Finish.

Running the App

• Make sure your virtual device is selected in the toolbar.
• Click the Run button (green triangle) in the top toolbar.
• Android Studio will build the app, launch the emulator, and install the app on the virtual device.
• You should see your “Hello, World!” message on the screen!

Conclusion

Congratulations! You’ve successfully set up Android Studio for Kotlin development on Ubuntu 24.04, and you’ve created and run your first Android app.

Now that you have a solid foundation, you can explore more advanced Android development topics, such as building user interfaces, working with APIs, and handling databases.