Kotlin on Android. Now official

Today, at the Google I/O keynote, the Android team announced first-class support for Kotlin. We believe this is a great step for Kotlin, and fantastic news for Android developers as well as the rest of our community. We’re thrilled with the opportunities this opens up.

For Android developers, Kotlin support is a chance to use a modern and powerful language, helping solve common headaches such as runtime exceptions and source code verbosity. Kotlin is easy to get started with and can be gradually introduced into existing projects, which means that your existing skills and technology investments are preserved.

Kotlin for Android

Starting now, Android Studio 3.0 ships with Kotlin out of the box, meaning Android developers no longer need to install any extras or worry about compatibility. It also means that moving forward, you can rest assured that both JetBrains and Google will be supporting Android development in Kotlin.

In case you are concerned about other platforms that Kotlin supports (Kotlin/JVM for server and desktop, Kotlin/JS and Kotlin/Native), please be sure that they are as important for us as ever. Our vision here is to make Kotlin a uniform tool for end-to-end development of various applications bridging multiple platforms with the same language. This includes full-stack web applications, Android and iOS clients, embedded/IoT and much more.

Programming languages are just like human ones: the more people speak a language, the better. First-class support on Android will likely bring more users to Kotlin, and we expect the community to grow significantly. This means more libraries and tools developed in/for Kotlin, more experience shared, more Kotlin job offerings, more learning materials published, and so on. We are excited to see the Kotlin ecosystem flourish!

We will be partnering with Google to create a non-profit foundation for Kotlin. Language development will continue to be sponsored by JetBrains, and the Kotlin team (over 40 people and second largest team at the company) will operate as usual. Andrey Breslav remains the Lead Language Designer, and Kotlin will be developed under the same principles as before. We’ll keep our design processes open, because your feedback is critical for us in moving Kotlin in the right direction.

If you’re at Google I/O, make sure you stop by one of the Kotlin talks on the schedule. And of course, don’t forget to register for KotlinConf in San Francisco in November. It will be an amazing event!

A Big Thank You!

When we started the journey with Kotlin over 6 years ago, we aimed at creating a language that would be in line with the same principles that drive our tools – create something that helps developers with the tedious and mundane tasks, allowing them to focus on what’s truly important. And of course make the process as enjoyable and fun as possible.

We want to thank Google and the Android team for their trust in Kotlin, but above all we want to thank you, our community, our users. Without you Kotlin wouldn’t be where it is today. Thank you for accompanying us during this journey and we hope you join us for the exciting road ahead.

Frequently Asked Questions

We’ve prepared answers to a series of questions that you may have in regard to this announcement. If your question is not covered, please feel free to ask us in the comments. If you are new to Kotlin, make sure you check out the FAQ on the web site where you can learn more about the basics.

Is Kotlin going to become primarily focused on Android?

One of Kotlin’s goals is to be a language that is available on multiple platforms and this will always be the case. We’ll keep supporting and actively developing Kotlin/JVM (server-side, desktop and other types of applications), and Kotlin/JS. We are working on Kotlin/Native for other platforms such as macOS, iOS and IoT/embedded systems.

How does this impact Kotlin’s release cycles?

Kotlin will continue to have its own independent release cycle from that of Android or Android Studio. The projects remain completely independent. Obviously there will be close collaboration between the product teams to make sure that Kotlin is always working correctly in Android Studio.

Who’s going to work on the Android Studio plugin?

JetBrains will continue to work on the Android Studio plugin, collaborating closely with the Android Studio team.

Will this affect the support for IntelliJ IDEA, Eclipse or Netbeans?

No. Kotlin continues to be a language that targets multiple platforms and support for other IDE’s will continue to be provided as before. Obviously emphasis will be placed on IntelliJ IDEA with hopefully community contributions on the other ones.

Will this affect support for macOS or iOS?

No. We still have plans to support both of these systems with Kotlin/Native and nothing has changed in this regard.

Is JetBrains going to be acquired by Google?

No. JetBrains has no plans of being acquired by any company. JetBrains is and continues to be an independent tool vendor catering to developers regardless of their platform or language of choice.

Maxim Shafirov

This entry was posted in Android and tagged . Bookmark the permalink.

134 Responses to Kotlin on Android. Now official

  1. Charles says:

    Best news ever!

  2. Ryan Simon says:

    So excited for what this means for Kotlin and for development on Android. Thanks for making such a great tool and working with Google to make this happen!

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  6. Vithorio says:

    Am I dreaming?

  7. Kirill Rakhman says:

    Android Studio 3.0?

  8. Robert Chrzanowski says:

    This is great news! Thanks to everyone at JetBrains for massively improving the developer experience on Android.

  9. Sounds interesting.. waiting for 3.0 and iOS support

  10. Lakedaemon says:

    I have been using Kotlin for android development for the past 3 years…
    Apart from new users/popularity (I don’t care), Android studio (using intellij is what sold Kotlin to me), what benefits will there be for the current android developers with the new Google/JetBrains collaboration ?

    Will they start writing framework classes in Kotlin ?
    Will they fine tune art/dalvik so that things work better/faster ?

    • Lakedaemon says:

      I have been using Kotlin for android development for the past 3 years…
      Apart from new users/popularity (I don’t care), Android studio (using intellij is what sold Kotlin to me), what benefits will there be for the current android developers with the new Google/JetBrains collaboration ?

      Will they start writing framework classes in Kotlin ?
      Will they fine tune art/dalvik so that things work better/faster ?

      I see mostly benefits for Google (hello Oracle)… what’s in for us, kotlin users ?

      • Wired4more says:

        One benefit is that large companies can increase their confidence to standardize on Kotlin by knowing that it is officially listed as a first class Android language. This should green light a lot more projects.

        • Hassan says:

          Will Google write API examples in Kotlin? In my last project, I was copying java code knowing that Android Studio smart enough to convert it into Kotlin. I was bored for not knowing how to do something in Kotlin i.e adding a listener, AsyncTask etc.

          • Andrew says:

            I beleive that Google will convert their docs to something that Apple or Microsoft have

            adding a listener, AsyncTask etc.

            For the first time a relatively short migration guide at developer.android will be enough.

            All the SDK stuff work the same way, you just have to specify a type once instead of twice and memorize some new keywords.

            Listeners(my favourite part) in comparsion with java are like magic, bunches of useless interfaces are no more.
            You can create a method with callback like this:
            fun myMethod(callback: (Mytype)->Unit) {
            var tmp: MyType = MyType()
            //do something

            and call it like this:
            myMethod {

  11. Bosun Egberinde says:

    Wow! This is Awesome!!!

  12. Kevin c says:

    Kaitlin should try and become a first class Lang on FuchsiaOS. Especially now with the native VM.

  13. Mariano Zorrilla says:

    Amazing news! Congrats to the team that make this happen. Waiting anxiously for that AS 3.0 build to be up.

  14. Renan Neves says:

    Still good! Now it’s Kotlin in charge.

  15. Debo Ajagbe says:

    Great news

  16. Victor Ude says:

    Thank you, sincerely, for making wonderful products and continuing to improve the quality of life for developers.

  17. Happy to hear that JetBrains has no plans of being acquired by any bigger corporation. This would destroy your innovation potential and make you biased towards certain tech. strategies.

    Stay independent and privately owned which is the best long-term evolvement strategy for a great tech tool vendor!

  18. I wonder how developers will balance learning Java 8 with Kotlin. And now that Java 9 is just around the corner, it can get a bit overwhelming. Do you have advice on which features to focus on at the moment?

  19. Parsee says:

    Why not Scala or Idris? Is Google going to be acquired by JetBrains?

    • Matias says:

      Wut? I can’t help but wonder how JetBrains would buy Google. Anyway, Scala for Android has a huge overhead and Idris has a smaller community than Ghost for Unity.

  20. Pingback: Kotlin es ahora el principal lenguaje de programación en Android #IO2017 | Trucos para Moviles Android

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  23. Pingback: Google is adding Kotlin as an official programming language for Android development – Tech Box

  24. Pingback: Android embraces the Kotlin programming language | TechANerd

  25. Reza Shah says:

    Wow, great news.
    Really happy to hear this.

  26. Tom Tantisalidchai says:

    I watched the keynote this morning. I really feel happy for your team. Congratulations! This is really great and exciting news.

  27. Pingback: Android embraces the Kotlin programming language - InfoSecHotSpot

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  29. huodong says:


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  31. Pingback: Google is adding Kotlin as an official programming language for Android development | Deluxous

  32. Hassan says:

    Android Studio takes a long time to compile Kotlin, I want compilation as fast as java. When will it be possible?

  33. Pingback: Kotlin es ahora el principal lenguaje de programación en Android #IO2017 | Ayuda para tu Celular

  34. doubll says:

    good bye, java?

    • Bastien Ladron says:

      Because of Kotlin, Java has no more reason to be used for next developments. And it’s a fully-positive news, not a fighting situation :)

      • eugene says:

        android app devs now have the freedom of choice of programming lagnuages when developing app using android sdk: they can use only java as they used, they can mix java and kotlin in the same project, or they can only use kotlin in their project.

  35. Pingback: Google adds Kotlin as an officially supported Android programming language - SiliconANGLE

  36. Pingback: Google is adding Kotlin as an official programming language for Android development

  37. huangkuncan says:

    Good news,I will try kotlin today

  38. Inquiring mind Q:
    Can Kotlin’s relationship with Java be compared to TypeScript’s relationship to JavaScript?

  39. Pingback: Kotlin on Android: Now Official – Technology Up2date

  40. happy everyday says:

    breaking news, hope kotlin can really make development of android better

  41. snowdream says:

    Wow, great news.

  42. ptfree says:

    Great news, last concern on using it for our company app is gone now, thanks.

  43. This is really a great move by Google. Hope now Kotlin will get more priority in the programming language arena. great news indeed.

  44. Fahmi Sidik says:

    So happy reading this news.

  45. Pingback: [Kotlin de Android] Kotlin が Androidの公式開発言語になったので、AndroidStudio3.0 Previewで試してみた | Usaco-pg web site

  46. Pingback: Kotlin es ahora el principal lenguaje de programación en Android #IO2017 | Todo Diario

  47. blackcater says:


    I am not lonely any more!!!

  48. Pingback: Google is adding Kotlin as an official programming language for Android development – SleepingSoldier

  49. Pingback: Kotlin es ahora el principal lenguaje de programación en Android #IO2017

  50. Putra says:

    Awesome news for Android Developers, for student collage, and lecture, update the curiculum now LOL


  51. bowman says:

    Cheers , JetBrains is a Great company!

  52. Pingback: Google объявила о поддержке в Android созданного россиянами языка программирования Kotlin — PRESSTA

  53. Pablo says:

    That’s sad.
    Java is, was and will be fine language. I don’t understand why to use kotlin.
    It’s just art for art, just another ‘thing’ that bored developers could use to be not so bored…

    • Klaus says:

      I don’t agree, try to check e.g. the type projection syntax here https://kotlinlang.org/docs/reference/generics.html this is among other things a great plus when using Kotlin.

    • Bastien Ladron says:

      Scala is a kind of art for art. Kotlin is pragmatic and brings you saving-time features, it combines fun and utility.
      In comparison, Java struggles to try to give us modern features we need.

      A simple example that I showed to a colleague of mines yesterday:
      #Kotlin: executions.groupBy { it.price }.size > 1
      #Java: executions.stream().collect(Collectors.groupingBy(it -> it.getPrice(), Collectors.counting())).size() > 1

      Which one do you prefer?

  54. Leonid says:

    Inspiring news!

    Keep making greatest tools for developers. Thank you!

  55. Pingback: Google I/O: Google startet öffentliche Beta von Android O | ZDNet.de

  56. Christian says:

    Could JetBrains create a nice “Who is using Kotlin?” page on kotlinlang.org? That would be very helpful to convince manager to give Kotlin a try!

  57. JHelp says:

    Solve common headaches such as runtime exceptions => Good developper haven’t this issue.

    and source code verbosity => Verbosity have lot of advantage , you know and can control what you do

  58. Whs says:

    Hi , I have a question as a beginner of Kotlin. Since I’m a Android-Engineer and working with Unity ,and provide .jar files to the unity engineers ,I wonder if we can work fine with Kotlin like Java . Thanks very much !

  59. Nikhil Maurya says:

    This account is just to say: Congratulations

  60. Very Nice, very excited for programming in Kotlin for Android app development.

  61. Hawken says:

    It’s good for us !

  62. Oleg Alekseev says:

    Cool news

  63. ! ! ! ! CONGRATULATIONS ! ! ! !

    This is a tremendous accomplishment guys, and will mark the official start of a post-Java era.

    Incredible. Tears of joy over here.

  64. Pingback: Kotlin Now an Official Android Language - JobberTalentTalkJobberTalentTalk

  65. Pingback: Michael Tsai - Blog - Android Adds Official Kotlin Support

  66. Pingback: Kotlin agora é sua vez! – DevBlog

  67. Marco says:

    It’s hour of learn Kotlin…

  68. Mustafa says:

    it looks like swift !!

  69. xwsoul says:

    You have worked for it.

  70. Kasun says:

    …………This is great news! Thanks to everyone at JetBrains…….

  71. MagicWeirdo says:

    When will Android Studio 3.0 be released?

    • Dmitry Jemerov says:

      Android Studio 3.0 Canary 1 is available now. As for the final release, we can’t provide any information.

  72. We adopted Kotlin recently and couldn’t be happier with Google’s decision. If you are curious about trying it out, checkout our first impressions using Kotlin. https://arctouch.com/2017/05/kotlin-vs-java/?utm_source=Whitney+Gonzalez&utm_campaign=amp+adam

  73. Rishabh Rawat says:

    kotlin for android this is good news.But i want to know that is jetbrains has future plan to support kotlin in ios. But jetbrains has done very great work because now kotlin run on android dalvik virtual machine, Java virtual machine and javascript V8 engine and future plan is to support kotlin in embedded system which is ARM(advanced RISC machine) based processor.So Now we say that Kotlin is future language which support in any platform and virtual machine.

  74. Nixon Kosgei says:

    I love Jetbrains

  75. ikidou says:

    Android studio with kotlin plugin will take a ClassNotFoundException when I run a Kotlin application(use gralde),and the reason is android studio never compile kotlin source file before launch,but java source file compiled.

  76. Noli SJ says:

    I’ve been saying this to those who don’t even want to listen: Kotlin is going to be a big part of Android development. Now it has become a reality.

  77. Rain says:

    It’s a good news,but The world changed so fast,I hope one day The AI can help us to write it ,and we just say “AISUG” help me to code it ^-^。。。

  78. Pingback: Kotlin – SAIFUL DIARY

  79. Prithvi Raj says:

    Great news ! Switch to kotlin.

  80. Great News !!
    Android development will be lot more fun
    I am tired of the NullPointerException in Java 😛

  81. Kotlin native for iOS and Mac OSX, why not. But why not investing on a JVM AOT instead and make all the existing Java code also available on these platforms? Do you see any issue with the multi-os engine from Intel, now back to Migeran? They do support Kotlin as well.
    Another great, great enterprise platform to support is Microsoft. Many companies moved to Office 365/Sharepoint, thus targeting this environment will open a lot of doors to the Enterprise Java developer community.

  82. shripad D Kulkarni says:

    Sounds interesting.. waiting for iOS support

  83. A great evolution in coding. This will surely help programmers to wipe out the common errors which takes hours for resolving them. Thank you so much. But yet much more is expected from Kotlin in the near future. :-)

  84. Pingback: Google is adding Kotlin as an official programming language for Android development

  85. Nyagaka Enock says:

    This is good news for android developers. But i have an issue when running my Kotlin android Project. Any help about this error.

    Declaring custom ‘clean’ task when using the standard Gradle lifecycle plugins is not allowed

  86. Andrew says:

    This is awesome! A coworker recently wrote about his first impressions using Kotlin instead of Java for a commercial Android project – http://bit.ly/2qsPmqQ

  87. Now that sounds to be a good news from JetBrains, especially for the developers. So now developers are no more stuck with Java as they have now an option as better as Kotlin for developing apps. Great effort by the team. Keep rocking.

  88. Pingback: Kotlin on Android. Now official | Kotlin Blog – Ali J. Nabavi

  89. Pingback: The Cool Stuff From Google I/O 2017

  90. tolg says:

    It’s my time to start develop Android app. I have kept away from developing Android app only because Java is the only choice.

  91. Pingback: Google Rolls Out Kotlin As Official Programming Language For Android Development | Important Events 24

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  97. Guillermo says:

    y para que?
    Puras pajas mentales.

  98. sabarinath s says:

    great news…going to develop my website app with Kotlin.

  99. Pingback: Concise + Safe + Interoperable + Tool friendly = Kotlin - Mobio Solutions

  100. PRX says:

    Hi Tim,

    I’m new on Kotlin.
    I have try to compile android app that develop using kotlin android android studio 3.0.
    When I try to compile to device, when i try to Xiaomi redmin note 4x and Xiamoi Mi5, i got message Application installed failed. But when try to Samsung A5 and Assus Zenfone everything running well.

    I hope i can using my xiaomi device to try to build android app using kotlin

  101. This is one of the most exciting news for Kotlin getting official support from Android, this will make development more fun. Thanks Team :)

  102. Pingback: Kotlin Climbs TIOBE’s Programming Language Rankings - JobberTalentTalkJobberTalentTalk

  103. Robert Smith says:

    I have been working on Kotlin for couple of weeks by converting the Activities of the android app I developed java to Kotlin. Kotlin seems and feels an easier language than java. The best thing about is that I could use Java and kotlin activities side by side. So I didn’t have to convert all my Activities to Kotlin before I could test it. However, my question is I read that Kotlin a cross platform app as in Android and iOS. How does that work?

  104. HGH says:

    Will there be any improvement of how C++ calls Kotlin code on Android? The Java way is horrendous.

  105. Pingback: Kotlin Climbs TIOBE's Programming Language Rankings - Dice Insights

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