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Introduction

Kotlin is a general-purpose programming language that JetBrains initially designed. It is a statically typed and free, open-source programming language. Today, Kotlin is widely preferred by developers to build Android applications and completely interoperates with Java libraries and Java Virtual Machine (JVM). 

In 2017, it was announced that Google would support Kotlin as a new Android development language. Currently, over 60% of Android developers boast developer satisfaction with the use of Kotlin for boosting productivity and code safety. Besides, over 80% of the top 1000 Android apps are built using Kotlin, including top companies like Netflix, WordPress, Expedia, Trip Advisor, Twitter, Pinterest, Amazon Kindle, Airbnb, American Express, Reddit, Adobe Acrobat, and more. 

Kotlin programming language is also used for server-side development and offers developers to use popular libraries and frameworks like ReactJS andVueJs. With the possibility of faster Android app development, Kotlin has gained prominence and is among the most sought-after skillset. Therefore, aspirants and experienced professionals aiming for a career in Android development must seek top Kotlin courses to upskill themselves to achieve lucrative career opportunities.

1. Kotlin for Java Developers by JetBrains – Coursera

Kotlin for Java Developers by JetBrains – Coursera

This is the Kotlin programming language course offered by JetBrains on Coursera. In this certificate program, the learners will master programming in Kotlin. 

The course begins with an overview of the programming language, use cases, and the problems concerning Java interoperability. Next, the learners will explore various programming features, basic syntax, and other factors such as nullability, functional programming, and object-oriented programming with Kotlin. 

Additionally, the learners will understand the uses of the standard libraries in Kotlin and how it aims to solve the problems of Java interoperability. However, it is an intermediate program; therefore, the participants are expected to have fundamental knowledge about the Java programming language. 

The course curriculum includes:

  • Introduction
  • Starting up with Kotlin
  • Nullability and Functional Programming
  • Properties, OOP, and Conventions
  • Sequences, Lambdas with Receiver, Types

Instructor: Svetlana Isakova and Andrey Breslav

Level: Intermediate

Duration: 25 hours

User Review: 4.7/5

No. of Reviews: 1616

Price: Free Enrollment (Additional charges for certification may apply)

2. Developing Android Apps with Kotlin by Google – Udacity

Developing Android Apps with Kotlin by Google – Udacity

This is a free course offered by Google on the Udacity platform. The online training program offers the techniques to create apps in less time and with fewer codes and errors. The learners will learn to architect Android Kotlin development using various tools and libraries. Furthermore, the course provides hands-on experience to build industry-oriented Android applications using best practices and modern app architecture. 

The learners will build apps using the Android jetpack components such as Room for the database requirements, Work Manager for background processing, and the Navigation components. In addition, the learners will explore various Kotlin-based features for quicker and concise coding. 

This course is intended for intermediate developers, so the participants with prior programming experience will gain more from this program. 

The course curriculum includes:

  • Build Yours First App
  • Layouts
  • App Navigation
  • Activity and Fragment Lifecycle
  • App Architecture: UI Layer
  • Data Layer
  • Recycler View
  • Connect to the Internet
  • Behind the Scenes
  • Designing for Everyone

Instructor: Lyla Fujiwara, Dan Galpin, Aleks Haecky, Sean McQuillan, Asser Samak, and Murat Yener

Level: Intermediate

Duration: 2 months

User Review: NA

No. of Reviews: NA

Price: Free

3. The Complete Android and Kotlin Developer Course – Udemy

The Complete Android and Kotlin Developer Course – Udemy

This course is available on Udemy. In this tutorial, the learners will be familiar with the developmental process for building Android apps using Kotlin. 

The learners will explore the latest Android APIs and services and will be exposed to various practical exercises to master the programming skills.  At the end of the course, the learners will create professional Kotlin applications, submit apps to Google Play and generate revenue, build commercial applications like Twitter or weather apps, and create connections from Android to PHP web services.

Furthermore, the learners will understand how to work with databases while building apps and learn material design rules for mastering the skills for creating appealing design layouts, style, and color, including top-level features and menus for navigability. In addition, learners will be well-equipped to build production-ready complex Android Kotlin applications, work with web services. 

The course contents are:

  • Introduction
  • Downloading and Installing Required Software
  • Creating the First Android App
  • Basics of Kotlin Programming Language
  • Intermediate Kotlin Programming
  • Advanced Kotlin Programming
  • Creating Amazing Android Apps
  • Online Quiz
  • App Building Projects
  • E-Commerce App with Paypal Integration
  • Retrofit and Kotlin Coroutines
  • Git- Android

Instructor: Morteza Kordi

Level: Beginner/Intermediate

Duration: 38 hours and 18 minutes

User Review: 4.8/5

No. of Reviews: 692

Price: $47.6

4. The Complete Android 12 and Kotlin Development Masterclass – Udemy

The Complete Android 12 and Kotlin Development Masterclass – Udemy

The course is offered on Udemy. In this learning program, the learners will have thorough knowledge about object-oriented programming and Android development concepts. 

The learners will understand variables, data types, functions, classes, and inheritance. Moreover, the use of control flows and data structures in programming is covered in-depth. Furthermore, the learners will explore networking and an asynchronous API call to retrieve data from the cloud and store it in the cloud platform. 

In addition, the benefits of JSON, SQLite, GPS, camera, and gallery requirements for applications are some of the essentials covered in the course. Finally, the learners will delve into additional android device features, third-party libraries, Firebase, and best practices of Kotlin for building Android apps. 

The tutorial follows a practical approach towards learning, and the learners can expect to be exposed to various hands-on sessions to build their Android development techniques. 

The course contents are:

  • Introduction
  • Getting Ready with Android Studio
  • Kotlin Fundamentals
  • Object-Oriented Programming Basics in Kotlin
  • More Fundamentals of Kotlin
  • Age in Minutes App-Android 10
  • Calculator App Building
  • Quizzes
  • Drawing app for Android 12
  • 7 Minute Workout App Android 12 Version
  • Location, GPS, Google Maps API
  • Weather App Building: Downloading Website, JSON, GSON, Using APIs
  • Bonus

Instructor: Denis Panjuta

Level: Beginner

Duration: 63 hours and 26 minutes

User Review: 4.5/5

No. of Reviews: 4453

Price: $47.6

5. Become an Android Kotlin Developer Nanodegree Program – Udacity

This is a specialization program that is created in collaboration with Google. It is available on Udacity. The course will prepare learners to master the programming skills to become professional Android developers. 

From the best practices to various development techniques, the learners will cover every aspect of object-oriented programming with Kotlin and learn Android development in this program. Moreover, the features of Android Studio and the uses of Android Jetpack will be covered in-depth with practical sessions to allow learners to build their applications for the mobile platform. 

Some prerequisites include prior experience with object-oriented programming, experience in navigating GitHub and using modern IDE. In addition, the participants are expected to know modular app architecture and familiarity with Kotlin programming language syntax. The course curriculum includes:

Developing Android Apps: Part 1

In this module, the learners will cover standard Android UI components and create a primary user interface. Next, the learners will be familiar with how to handle user inputs and the Android lifecycle events.

Additionally, the concepts on creating dynamic and navigable interfaces using constraint-based layouts are covered with practical demonstrations and assignments.

Finally, the learners will learn to use the Gradle build process for declaring library dependencies and establish various app parameters to integrate app functionality with different apps or components with Android.

Developing Android Apps: Part 2

The second module focuses on providing learners with the necessary exposure in implementing data persistence in the app, data collection using Recycler View, APIs to connect to the store and retrieve data.

Additionally, the learners will learn the best material design practices for creating a quality user experience and making the applications accessible to users.

Advanced Android Apps with Kotlin: Part 1

The third module aims to enhance the learners’ skills regarding improving the app functionalities and user engagement using Android’s notification system. Furthermore, the learners will learn to build custom views and work with canvas drawing to ensure the update of the display based on user interaction.

The learners will also learn to create simplistic animation to improve the presentation of the app content and overall usability of the app.

Advanced Android Apps with Kotlin: Part 2

The final module focuses on allowing learners to master the skills to build advanced and complex applications with location awareness and Google maps integration.

Furthermore, the learners will understand the best practices and techniques professional developers follow for testing and scaling their apps faster and safer. Finally, the learners will understand the implementation of Firebase for authentication and remote storage.

Instructor: Dan Galpin, Aleks Haecky, Sean Mcquillan, Murat Yener, Chet Hasse, Meghan Mehta, Caren Chang, Lyla Fujiwara, Asser Samak, Joshua Donlan, Kevin Moore, Jesus Valdez, Aida Issayeva, and Mohammed Habib

Level: Intermediate/ Advanced

Duration: 4 months

User Review: NA

No. of Reviews: NA

Price: Monthly Access: $310.8/ 4-Month Access: $1056.8

6. Kotlin for Java Developers – Udemy

Kotlin for Java Developers – Udemy

This course is available on Udemy. It is designed to teach Java developers how to use Kotlin to enhance their development skills. The learners will cover the key differences between Java and Kotlin and understand how Java and Kotlin programs interoperate.

Furthermore, the learners will learn to create Kotlin programs. However, it is essential to understand that this course does not offer specific Android development sections alone. 

The course contents are:

  • Introduction to Kotlin
  • Basic Difference between Kotlin and Java
  • Data Types and Null Reference Handling
  • OO and Kotlin: Classes, Functions, Inheritance
  • Loops, If, When, and Try/Catch Expressions
  • Lambda Expressions, Collections and Generics
  • File I/O
  • Java Interoperability

Instructor: Tim Buchalka, Goran Lochert

Level: Beginner/ Intermediate

Duration:16 hours and 45 minutes

User Review: 4.5/5

No. of Reviews: 2834

Price: $47.6

7. Kotlin Essential Training – LinkedIn Learning

Kotlin Essential Training – LinkedIn Learning

This tutorial is an excellent choice to learn the Kotlin programming language. It is offered on the LinkedIn Learning platform. In this program, the learners will cover the basic syntax, concepts on null safety, and Java compatibility. Besides, the learners will be familiar with the command-line programs using the Kotlin programming language. 

Additionally, the learners will understand data types, variables, and how statements are different from expressions and the different types of expressions used in programming. 

Finally, the learners will deep dive into Kotlin features such as functions, classes, coroutines, and debugging Kotlin codes. The course contents are:

  • Introduction
  • Kotlin Development Preparations
  • Data Types
  • Control Flow
  • Collections and Sequences
  • Input, Output, and Files
  • Functions
  • Classes, Objects, and Interfaces
  • Debug the Kotlin Code
  • Harness the Power of Coroutines
  • Conclusion

Instructor: Tory Miles

Level: Intermediate

Duration: 3 hours and 30 minutes

User Review: NA

No. of Reviews: NA

Price: 1-Month Free Trial (Charges may apply after trial period)

8. Getting Started with Kotlin – Pluralsight

This course is available on Pluralsight. The online program focuses on introducing Kotlin to learners from scratch. 

First, the learners will understand how to install Kotlin and its tools and set up the IDEs to use Kotlin. Next, the learners will be familiar with the Kotlin language syntax and learn to use the object-oriented features of Kotlin. 

At the end of the course, the learners will have a comprehensive understanding of Kotlin, the programming features of Kotlin, and gain proficiency in writing and testing programs in Kotlin. Moreover, the learners will proceed with advanced Kotlin concepts after gaining a solid foundation of Kotlin basics in this training program. 

The course contents are:

  • Introduction
  • Using Command Line Tools
  • Installing Plugins
  • The First Kotlin Application
  • Interfaces
  • Demonstrations
  • Classes and Companion Objects
  • Properties
  • Data Classes
  • Higher-Order Functions
  • Transforming Data with Map
  • Filtering Data
  • Transforming Data with Flat Map
  • Working with the Java Ecosystem
  • Using Spek
  • Extending Spek Tests
  • Mocking in Kotlin
  • Summary

Instructor: Kevin Jones

Level: Intermediate

Duration: 2 hours and 9 minutes

User Review: 4.6/5

No. of Reviews: 85

Price: 10-Day Free Trial (Charges may apply after trial period)

9. Kotlin for Android: Beginner to Advanced – Udemy

This is a comprehensive course on Kotlin for Android development offered on Udemy. The certification program provides learners with the essentials for Kotlin, including the uses of interface builders and the SDKs used in application development. 

In addition, the learners will know how to build professional-looking applications from scratch. Moreover, the learners will explore various concepts, from installing JDK and Android Studio to running apps on different devices. The learners can expect to build solid Kotlin foundations and be familiar with the uses of variables, strings, collections, classes, and inheritance in development.

Furthermore, the learners will understand the activity life cycle and deep dive into concepts like constraint layouts to support multiple devices. 

Finally, the learners will understand how to enhance UI, the uses of Kotlin with Android SDK, lists and recycler views, implementation of web sockets, and working with APIs to build a fully functional application. 

The course contents are:

  • Android Studio and First App
  • Kotlin Foundation
  • Terminal and Version Control
  • All About Layout
  • List and Recycler Views
  • Smack Chat App Building
  • Publishing the App

Instructor: Mark Wahlbeck

Level: Beginner

Duration: 22 hours and 52 minutes

User Review: 4.5/5

No. of Reviews: 2697

Price: $47.6

10. Kotlin for Beginners – Zenva Academy

Kotlin for Beginners - Online Course – Zenva Academy

The course is available at Zenva Academy. In this certificate course, the learners will create Android applications with Android Studio and Kotlin programming. The learners will explore the layout of the applications and understand how to run in different developmental environments. Furthermore, the learners will be familiar with the setup of Android studio and layout editor to define the application looks. 

Additionally, the learners will implement Kotlin and XML to create simple programs and mobile applications. Besides, the learners will delve into the testing concepts in detail and learn to test the applications on a device with an emulator before publishing them on the app store. 

Another benefit of this course is the availability of source code for reference for all the participants. However, this tutorial has prerequisites that include prior programming experience, especially in the Java programming language. 

The course contents are:

  • Introduction
  • Installing Android Studio Mac
  • Installing Android Studio Windows
  • Creating a New Project
  • Android Studio Basics
  • Layout Editor Part 1 and Part 2
  • Working with XML Editor
  • Kotlin Basics Part 1 and Part 2
  • Running on the Emulator
  • Running on a Device

Instructor: Industry Professionals

Level: Beginner/Intermediate

Duration: Self-Paced

User Review: 4.7/5

No. of Reviews: 498

Price: $50

11. Developing Android Applications with Kotlin: Beginner Learning Path – Pluralsight

Developing Androida Applications with Kotlin- Beginner Learning Path – Pluralsight

This is a learning path that includes various courses covering different aspects of Kotlin programming and Android development. It is available on Pluralsight. The learning path provides the core Kotlin concepts and Android skills required to master the development skills required in a professional environment.

 In addition, the learners will be aware of how to provide an interactive user experience in the applications. The courses in this path ensure learners to be well-equipped with the necessary tools, techniques, and best practices to develop Android applications that offer a tremendous experience to its users.

App Fundamentals: The beginner learning path provides the core concepts of Android and Kotlin with an emphasis on building interactive applications. The courses are:

Developing Android Applications with Kotlin: The Big Picture

The first course offers the learners to understand native development using Kotlin and discover the benefits of the Kotlin programming language. Finally, the learners will learn about the essential tools available for native Android applications.

Developing Android Applications with Kotlin: Getting Started

The second course will allow learners to understand and enhance their programming skills to develop Android apps using Kotlin. First, the learners will create a new app and run this app in the Android emulator. Furthermore, the learners will cover the basics of implementing types in Kotlin to describe their app’s object model using Kotlin. 

Next, the learners will learn to create an interactive user experience and understand the process of multi-screen user experience to pass information between screens and use the options menu to create actions. Besides, the learners will be familiar with the lifecycle of Android activities and understand how to save persistent data and instance data.

Testing and Debugging with Android Studio and Gradle

This course deals with the testing and debugging concepts with Android Studio and Gradle. The learners will learn to leverage the debugging skills to shorten the development time with automated tests to catch bugs effectively. 

In addition, the learners will configure and create projects in the Android studio and use Android SDKs. Furthermore, the learners will discover multiple build variants for applications and use external libraries for the app development project. 

Finally, the learners will understand the uses of Logcat and Debugger tools in Android studio to resolve issues during development.

Customizing Styles and Themes with Resources

In this tutorial, the learners will understand the critical components of scalability and optimization in app development. The learners will learn to customize styles and themes with various resources and implement them in the applications.

Additionally, the learners will understand how to adapt the application according to different users. Besides, the learners will explore the benefits of themes and app optimization with advanced methods.

Creating High-Quality UX with Android X

This course deals with the concepts of high-quality UX with Android X. The learners will deep dive into various Android X libraries and learn to implement them effectively. Moreover, the learners will explore the concepts of Recycler Views and Card View and other navigation techniques in app development. 

At the end of this program, the learners will be able to create scrollable lists, implement various techniques for navigation between fragments, and improve the user experience with the help of taps, swipes, and drag gestures.

Managing Lifecycle and View Model

The final course allows learners to explore advanced functionalities such as View Model and the Lifecycle of Android apps with Kotlin.

The learners will begin with the concepts on Android architecture components and understand how the View Model simplifies managing activity-related data to provide consistent access to the data irrespective of device orientation changes.

Furthermore, the learners will explore View Model uses with Save Instance State for assuring consistent user experience when navigating the application. 

The learners will also understand how to leverage Lifecycle components to ensure coordination between lifecycle-dependent components and the activities that use them. Finally, the learners will understand how to create flexible and easy-to-use components for Android apps.

Instructor: Markus Neuhoff, Jim Wilson, Nitin Singh, Anthony Alampi, and Sriyank Siddhartha

Level: Beginner

Duration: 12 hours

User Review: 4.5/5

No. of Reviews: 307

Price: 10-Day Free Trial (Charges may apply after trial period)

12. Kotlin Bootcamp for Programmers by Google – Udacity

Kotlin Bootcamp for Programmers by Google – Udacity

This course is available on Udacity. In this online learning program, the learners will delve into the fundamentals of Kotlin. Next, the learners will explore the features of Kotlin and understand how it differs from Java. 

By the end of the course, the learners will build basic programs using Kotlin and use the essential language features such as classes, collections, Lambda expressions, higher-order functions, and extensions to make development faster. 

There are prerequisites for the course that includes understanding object-oriented programming like Java, C++, or Python. In addition, the understanding of IDE such as IntelliJ or Android Studio is mandatory, and the participants are expected to know about installations of the latest versions of JDK and IntelliJ IDEA CE. 

The course contents are:

  • Introduction
  • Kotlin Basics
  • Functions
  • Classes
  • Kotlin Essentials: Beyond the Basics
  • Functional Manipulation

Instructor: Aleks Haecky, Sean McQuillan, and Asser Samak

Level: Intermediate

Duration: 2 weeks

User Review: NA

No. of Reviews: NA

Price: Free

Conclusion

Kotlin’s popularity continues to rise due to its unique features that allow writing concise and less code lines. Moreover, the Kotlin programming language offers interoperability with Java and is feature-rich with various advanced functionalities. In addition, it is easy to use and is less error-prone than other programming languages. Thus, developers with Kotlin know-how are highly sought after in the job market. 

It is evident as Kotlin developers command high average salaries in the US at $130,000 per year, whereas the most experienced developers are offered as high as $160,000 per year. Therefore, aspirants and experienced personnel must aim to learn Kotlin and enhance their programming skills to climb the hierarchical ladder as one of the top developers in the industry.

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Kaushik Das

Kaushik is an artificial intelligence researcher and a data scientist with expertise in medical image processing, intelligent automation, computer vision, and big data engineering—a technical and a scientific writer by passion. He is also passionate about sports, photography, traveling, and exploring new technologies.

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