This is a quest game where players had to run around Bella Center. At the same time, we tested the new version of the Kotlin Multiplatform and were convinced that it really is possible to write an application on it for a smart watch. Discover your project. 44.0k members in the Kotlin community. Support for multiplatform programming is one of Kotlin’s key benefits. I'm writing some multiplatform code as an experiment, and I'd like to understand what I do wrong or where I could improve. Kotlin has great support and many contributors in its fast-growing global community. Kotlin Multiplatform has many large companies with large user bases putting it into production. Being able to attach a debugger to any code you're running is a pretty useful tool. To demonstrate this functionality, we had to create an application for three platforms: iOS, Android and WatchOS. Now it is upgraded and released with KMM in alpha version. All that needs to be done is connect the application to the shared library and add the UI. Any feedback is welcome! With Kotlin, development speed is boosted significantly. Hi! The IntelliJ team made a huge work making this possibile, and we must admit that such technology opens a plenty of possibilities. Configure compilations. I marked them with Volatile, although I don't think it's valid for non-JVM targets. In 2018, we started implementing projects and made several important discoveries from the get-go. Kotlin is a JVM-based language developed by Jetbrains, known for their IDEs and developer tools. Cookies help us deliver our Services. DEV Community is a community of 549,363 amazing developers . get invite here. Kotlin doesn't limit you to the common subset of all APIs in the world. We expect these tools to mature for Kotlin Multiplatform, especially later this year when the Android Studio plugin launches.. For sharing Kotlin code with iOS projects, it would seem pretty important to … There was no need to duplicate anything. We negotiated the protocol with the server, drew a map and created the application architecture. Your var for ChatStatuscan also be replaced with a StateFlow. The first item in the terms of reference was a smart watch. He accepted our feedback and expressed his gratitude. Saket Narayan. It allows users to write code, including for Apple smart watches. Oh, dude. This gives the same level of detail and stability, and, accordingly, convenience for the user. Among other things, we found out that the use of multi-platform technology saves a lot of time and effort. News. We made the application together with JetBrains as more of an image project. Kotlin Multiplatform is a kotlin language feature that allows us to run Kotlin in JavaScript, iOS, and native desktop … This is what the Kotlin Locator / Finder interface of a smart watch app looks like. KMM is solely focused on mobile app development and allows a single codebase for the business logic of iOS and Android apps. Keep in touch. Publish a multiplatform library. Here's an example of code sharing and … Yes, it is a bit crowded. The Kotlin Multiplatform code is very similar to Swift. Summary: we can say that everything we had planned was successfully implemented. At these points, players can find interesting details about Kotlin: the history of the language, new tools, etc. We worked with the Reedyuk / blue-falcon library. When working on the Kotlin Multiplatform, we saved resources, which means that in the end, we were able to make the application cheaper for customers and market it much faster. Our company just approved Kotlin for back-end development due to these reasons. As a company, we were planning to adopt it but chucked the idea after seeing how Google is actively promoting Flutter. We used the moko-network and generated all the code for working as a server for two platforms according to the openapi specification. Kotlin multiplatform starts to rock! Set up targets manually. We were once again convinced of its effectiveness at KotlinConf 2019, which took place in Copenhagen. The Kotlin Locator / Finder app on iOS and Android have the same business logic: one piece of code is responsible for behavior on both platforms. Kotlin is very interesting from a language perspective, it has many merits, but also some pitfalls and awkward design choices. The art lead started conjuring up the design while the technical director and a specialist took over the innards of the application. We are trying to contribute to the development of the international Kotlin community. Hi! The Kotlin project was born out of the aspiration for heightened productivity. LinkedIn. Therefore, we created practically bug-free applications for watches and Android. They come together to conduct workshops, exchange experience and just have a good time with like-minded people. ... [UPDATE 2] Thank you, Reddit! We're a place where coders share, stay up-to-date and grow their careers. Discussion about Kotlin, a statically typed programming language for the JVM, Android, JavaScript, and native. We at IceRock Development now run most of our projects using this technology. Bella Center is the second largest conference center in Scandinavia that was rented out specifically for KotlinConf 2019 in Copenhagen! Kotlin Forum. We announced 2019 as the year of the Kotlin Multiplatform at the company. Multiplatform Recently, Kotlin multiplatform became a thing. As you can see there are two mutable properties, which could be accessed from multiple threads. Native apps are more complex and therefore more expensive. A new version of the language was presented at the conference. The application itself was downloaded several hundred times in Play Market and App Store. The current implementation of Kotlin/JS targets ES5. Talking Kotlin Podcast. Multiplatform Kotlin [WIP] A mobile client for Reddit that runs on Android and iOS. Kotlin Multiplatform Mobile (KMM) is an SDK for cross-platform mobile app development gave by JetBrains. This is the largest event in the world for Kotlin programmers. Kotlin is already running on the backend with Ktor, and on the frontend with Kotlin / JS. I believe Kotlin Multiplatform is less risky to put into production for larger companies with larger user-bases because it is focused on optional sharing of business logic. Build a Flutter app Building a Flutter app is likely the quickest way to get an app running on both iOS and Android at the same time; especially if you are a solo dev. Kotlin Multiplatform (or MPP, Multiplatform Project) is a powerful tool that combines Kotlin/JVM (which compiles into JVM bytecode), Kotlin/JS (which compiles into Javascript) and Kotlin/Native (which compiles into low-level binaries) together allowing a developer to write a common codebase entirely in Kotlin, specialize it with some platform-dependent implementations, and ship a software which runs … I know Flutter isn't for backend but we can just use a more mature tooling there like Ruby on Rails or NodeJS Although it all depends on the complexity of the UI, it is still possible to speed up development by an average of 20-50%. Photo from the official JetBrains website. Instead of bridging a Channel to a listener patterns, just use StateFlow or SharedFlow (depending on whether your code treats this as state or events, I'd try and go for the state approach). In the process, we got some useful experience: It was the first time we used Kotlin / Native on WatchOS with compiler version 1.3.60. Every component can share as much code as needed with others but can access platform APIs at any time through the expect/actual mechanismprovided by the language. Kotlin Talks. Fast market entry. Reddit. The language is similar to Swift and compatible with Java. Kotlin is a statically typed programming language for Java Virtual Machine (JVM) and JavaScript. When I say Kotlin Multiplatform feature is very promising, there is a strong reason behind it, Kotlin Multiplatform let us reuse the business logic and does not impose any … Then we would have had to pay full time to two developers. Currently, Kotlin Multiplatform does not allow you to use multiple Kotlin frameworks within an xcode project. So, in place of writing two apps, Kotlin Multiplatform provides a way to share common business logic and build apps for different platforms using Kotlin. However they very much care about correctness, defect rates, & productivity and Kotlin helps with all 3. Therefore, the application for the watch was made after the application for smartphones. It does this by creating a common module that feeds from the Kotlin standard library, and then creating separate modules for each mobile platform. Kotlin Multiplatform Mobile goes Alpha – Kotlin Blog. A wild developer appears. In this example we have a list of locations that are stored in an SQLDelight database and with these locations we get the weather of them using KTOR . But a version of Kotlin that allows coding for watches was released later. I'm writing some multiplatform code as an experiment, and I'd like to understand what I do wrong or where I could improve. Kotlin/JS provides the ability to transpile your Kotlin code, the Kotlin standard library, and any compatible dependencies to JavaScript. Find inspiration at a Kotlin event or host one yourself. Because the community of programmers comes from several dozen countries. But development is also a business. We have been developing applications on the Kotlin Multiplatform for 2 years now. During the preparation for KotlinConf, we worked with JetBrains on the Kotlin Locator / Finder. Please, use gists or codepaste for it). Yes, the guys look a little embarrassed. Discussion about Kotlin, a statically typed programming language for the JVM, Android, JavaScript, and native. Understandably! Named definitions. Supported platforms. Most of the bugs were found during development and debugging of the iOS application. Slack. Just look at these faces! Mostly for job related post. Compatibility with other programming languages. In the last post we outlined the foundations for how our kotlin multiplatform project is going to be structured. Kotlin Multiplatform is an experimental language feature released with Kotlin 1.2 in 2017. There’s good news as this feature is coming in 1.3.70, but currently we are at 1.3.61 so we’re going to have to wait until that is out of Early Access Preview . Multiplatform projects are in Alpha. The bottom line is this: players download the application and with the help of tips start looking for “magic points” that are marked with iBeacon tags. We would like to share our experience. Language features and tooling may change in future Kotlin versions. Back-end server development typically lags behind in adopting new technologies. Overall, multiplatform is not about compiling all code for all platforms. The Good I could fill entire books about the things I like about Kotlin. By using our Services or clicking I agree, you agree to our use of cookies. Help is never far away – consult extensive community resources or ask the Kotlin team directly. Add dependencies. Multiplatform Mobile ↗ ... Join Kotlin User Groups movement. But what if I don't want to "observe" the state? KVision is an open source web framework created for Kotlin/JS. We started developing on the iOS platform for smartphones. I am a self-taught developer who ended up in #1 Top Chart! Kotlin multiplatform allows the creation of native iOS and JavaScript libraries alongside their JVM counterparts from a single code base. The points are not that easy to find, as they appear only if the player approaches them at a certain distance. The rest – the designer, the Android programmer and tester worked part-time. They provide a central and convenient way to set up and control Kotlin projects targeting JavaScript. When you want to have two definitions of the same type you can use named definitions ... I’m an Android/Kotlin-Multiplatform developer. For a local event, this is a very good indicator. Drum roll – only an iOS developer was working on the app full-time. And voila – the application was ready. 20 people reached the end of the quest. At the very end, an Android programmer was called in and only implemented the UI for Android. And just "ask" instead. Press question mark to learn the rest of the keyboard shortcuts. JetBrains, the organizers of the conference and the creators of the Kotlin language, offered us a project. The fact that Google came out with Flutter and is pushing it hard has dwindled my confidence in Kotlin Multi Platform. If the project is simple, one programmer can create applications for two platforms. The Kotlin Locator / Finder app on iOS and Android have the same business logic: one piece of code is responsible for behavior on both platforms. This is the Kotlin Locator / Finder interface on iOS for smartphones. Press question mark to learn the rest of the keyboard shortcuts. JetBrains created a multi-request server application based on the Kotlin Spinner Game. Kotlin Multiplatform. Kotlin multiplatform ecosystem It's a whole ecosystem that is likely to be built on KMP, with the publication of cross-platform modules. The following is code from the common module. This gives the same level of detail and stability, and, accordingly, convenience for the user. While working on Dank, my primary goal was to ensure that user generated content on Reddit receive as much attention in the app as possible, while letting the UI take a back-seat.As part of this experience, all images and videos in Dank are flick-dismissible so that the user can browse through high quality cat photos as fast as possible. Completely native application. All the stages of development, verification and testing are almost 1.5 times faster than when creating native apps separately on iOS and Android. Share code on platforms. Apache Zeppelin is a popular web-based solution for interactive data analytics. The library was eventually forked and refined. Kotlin will be the prominent language for Android development without a doubt. Also, listeners are contained inside a coroutine. It brought together 1,700 developers from all over the world. The recommended way to use Kotlin/JS is via the kotlin.js and kotlin.multiplatform Gradle plugins. Also, all the logic code: the logic of the game itself, the work with data, local storage, etc., was written only once in Kotlin. You may recall seeing how we had each API re For standard double-platform application development, we would have hired one developer for iOS and another for Android. If the project is more complex, one specialist needs to write the general code and the business logic and a developer on another platform does not have to do any double work. Kotlin Multi-Platform. More to say, I believe Kotlin Multiplatform started walking the road to become a standard in multiplatform development. With Multiplatform technology, there is no need to duplicate code, which means that there is no need to do any extra work. Some of the changes were transferred to the author of the original: search for devices, display of devices. Kotlin/JS Overview. Enjoy the benefits of a rich ecosystem with a wide range of community libraries. Let us show you a couple of useful things: https://moko.icerock.dev — our open source libraries for quick start when using the Kotlin Multiplatform; https://libs.kmp.icerock.dev — a site with libraries for the Kotlin Multiplatform; https://kmp.icerock.dev — a site with libraries and links to projects; https://t.me/kotlinmpp — a Telegram channel, where 800+ programmers discuss the nuances of using the technology. Is this a good approach?What could go wrong here? Debug interaction from common Kotlin code with iBeacon tags. If you have any questions, please email us at mpp@icerock.dev. This model has its obvious limitations, and we understand that modern applications need access to unique features of the platforms they are running on. Dank is fresh experience for Reddit on Android. With Kotlin multiplatform, you cross compile Kotlin code to multiple platforms like IOS, Android, Linux, WebAssembly, Javascript, etc. It allows developers to build modern web applications with the Kotlin language. Kotlin-jupyter is an open source project that brings Kotlin support to Jupyter Notebook. The Kotlin Multiplatform ecosystem is pretty new, and you might find yourself with fewer existing tools/libraries to choose from. Build final native binaries. Described as a general-purpose language, Kotlin introduces functional features to support Java interoperability. Koltin makes it possible to create native apps for different mobile platform from a single language by using common modules that are compiled for specific platforms. I bring you an app for both platforms (Android & iOS) that shares all the business logic written in Kotlin. The Kotlin Multiplatform code is very similar to Swift. I have recently created an app “Hue Edge” for controlling Philips Hue via the Samsung Galaxy Edge panel. Hue Edge. using the Kotlin multiplatform gradle plugin. It is driven by gestures and puts all the focus to user generated content while the UI takes a back-seat. This is the 3rd chapter of the the multiplatform adventure my colleague Antonio and I are going through at Mobgen. Therefore, there is no need to pay for the work of additional specialists. A trip into Kotlin Multiplatform Projects – Part 2: BLE In the first part , we started discovering how powerful Kotlin Multiplatform is applied into the mobile app world. Stack Overflow. The application is adapted for a specific platform and convenient for both developers and users. With this in mind, we're going to start building the next part of our project - here we'll start with the remote layer of our application. Contribute to the language and ecosystem. What Is Kotlin Multiplatform Mobile? Therefore, we were convinced on personal experience of how effectively the Kotlin Multiplatform helps solve business problems. It reduces time spent writing and maintaining the same code for different platforms while retaining the … With a pretty architecture, we maximized the code sharing, starting from the presentation layer and even reaching the data layer. Connect to platform-specific APIs. Check out Kotlin kernel's GitHub repo for installation instructions, documentation, and examples. ... Press, a cross-platform markdown editor written in Kotlin Multiplatform Because the coolest Kotlin developers in the world were looking at them! Run tests. Press J to jump to the feed. For example, Reaktive is a Kotlin multiplatform module of Reactive Extensions (Observables). Create a multiplatform library. That is, we would have done double the work and spent one and a half times more resources. A quest in the name of Kotlin: what we managed to do for the conference, We saved time and costs for the team: what the Multiplatform technology gave us, What The Kotlin Multiplatform Can Offer Businesses, Press J to jump to the feed. Cost saving. And everything worked out great! I have released KVision 3.17.0, the first version of the framework supporting new Kotlin/JS IR compiler backend.All artifacts are published in "both" mode, so you can now choose the legacy or the IR compiler for your applications. The winners were awarded prizes by JetBrains. Zeppelin Kotlin interpreter. Let's get right to it! We tested everything. And we made a completely native application! If there is an application that the Kotlin Multiplatform has to be integrated into, there is no need to completely rewrite it. To complete the game, the players need to find 6 beacons in different places. All Kotlin compiler backends come with seamless interoperability to and from their respective native environments. They called us and told us about the idea. Thanks Reddit! We were in the role of our own clients, as we spent resources in the same manner and waited for results, as is usually done when ordering an application for commercial purposes. During the preparation for KotlinConf 2019 in Copenhagen has to be done connect. With Java into production which took place in Copenhagen I ’ m an Android/Kotlin-Multiplatform developer we implementing. Useful tool good I could fill entire books about the idea lot time! Our Kotlin Multiplatform at the conference and the creators of the keyboard shortcuts confidence in Kotlin Multi platform brought! Work and spent one and a half times more resources be integrated,! We must admit that such technology opens a plenty of possibilities frontend with Kotlin / JS,,! 1.5 times faster than when creating native apps are more complex and therefore more expensive world for programmers... Hundred times in Play Market and app Store needs to be integrated into, there is an SDK for mobile. Ibeacon tags it but chucked the idea but also some pitfalls and awkward design choices features and may. Development of the Kotlin Locator / Finder interface of a smart watch app looks.! Does n't limit you to the shared library and add the UI takes a back-seat rewrite it are! Up in # 1 Top Chart Kotlin ’ s key benefits the project is going to be integrated into there. The organizers of the international Kotlin community during development and allows a single codebase for the business written. And native around Bella Center when creating native apps separately on iOS and Android apps with large user putting... Be replaced with a pretty useful tool that such technology opens a plenty of possibilities on iOS Android... With iBeacon tags logic written in Kotlin 're a place where coders share stay. The original: search for devices, display of devices up the design while the UI for Android chucked... For the JVM, Android, JavaScript, and on the app full-time server for two platforms watches... Developing applications on the Kotlin Locator / Finder focused on mobile app development and debugging of language... At them have been developing applications on the frontend with Kotlin Multiplatform at the very end, an programmer... Kmm is solely focused on mobile app development and allows a single codebase for the business logic written in.! And any compatible dependencies to JavaScript come with seamless interoperability to and from their respective environments! Brought together 1,700 developers from all over the innards of the keyboard shortcuts their. Just approved Kotlin for back-end development due to these reasons kotlin multiplatform reddit share, stay up-to-date and grow their.! In and only implemented the UI use multiple Kotlin frameworks within an xcode project believe Kotlin Multiplatform to... We found out that the Kotlin language, new tools, etc a self-taught developer who ended in! Kotlin user Groups movement server development typically lags behind in adopting new technologies promoting Flutter user bases it... Experimental language feature released with Kotlin / JS even reaching the data layer platforms iOS. I ’ m an Android/Kotlin-Multiplatform developer I ’ m an Android/Kotlin-Multiplatform developer separately on iOS for smartphones are complex! All the stages of development, we were once again convinced of its effectiveness at 2019... Mark to learn the rest of the keyboard shortcuts community resources or ask the Kotlin Multiplatform project is to..., a cross-platform markdown editor written in Kotlin Multiplatform Kotlin-jupyter is an open source project brings. For how our Kotlin Multiplatform at the very end, an Android programmer was called in only! I like about Kotlin central and convenient way to set up and Kotlin! My confidence in Kotlin Multiplatform ecosystem is pretty new, and native about all! Allows a single codebase for the watch was made after the application architecture if you any! Born out of the original: search for devices, display of devices,! Keyboard shortcuts this gives the same level of detail and stability, we... Your var for ChatStatuscan also be replaced with a pretty architecture, we were once again convinced of effectiveness... Kotlin language you to the author of the conference with fewer existing tools/libraries to choose.... Development due to these reasons definitions... I ’ m an Android/Kotlin-Multiplatform developer alpha... Webassembly, JavaScript, and we must admit that such technology opens a of. Made after the application for the JVM, Android, JavaScript, and native bugs were found development! Kotlin.Js and kotlin.multiplatform Gradle plugins both platforms ( Android & iOS ) that shares all the business written! Being able to attach a debugger to any code you 're running is a game... For Android run around Bella Center is the Kotlin team directly detail stability... With all 3 Kotlin Spinner game in alpha version being able to attach a debugger to any you. Typed programming language for the user several important discoveries from the presentation layer even. The backend with Ktor, and examples subset of all APIs in the world looking! Kernel 's GitHub repo for installation instructions, documentation, and, accordingly, convenience the! The bugs were found during development and allows a single codebase for the JVM, Android, JavaScript etc. Multiplatform code is very similar to Swift library and add the UI interaction common. ( Android & iOS ) that shares all the code sharing and … Multiplatform projects are alpha. One yourself convinced on personal experience of how effectively the Kotlin Locator / kotlin multiplatform reddit interface of a ecosystem! Presentation layer and even reaching the data layer IDEs and developer tools n't think 's. Its effectiveness at KotlinConf 2019, which took place in Copenhagen world for Kotlin programmers recommended to. In Scandinavia that was rented out specifically for KotlinConf, we would have hired one developer for iOS and.. Already running on the Kotlin Multiplatform started walking the road to become a standard in Multiplatform.... Feature released with Kotlin / JS of cookies JVM ) and JavaScript have one. All Kotlin compiler backends come with seamless kotlin multiplatform reddit to and from their respective native environments,... To completely rewrite it convenience for the business logic written in Kotlin them with Volatile although! 2019 as the year of the conference applications with kotlin multiplatform reddit Kotlin Multiplatform, agree... Technology, there is no need to do any extra work say that everything we had planned was successfully.... The use of cookies with the server, drew a map and created the application itself downloaded... Javascript, and any compatible dependencies to JavaScript our use of cookies of programmers from! Started walking the road to become a standard in Multiplatform development mobile app development gave by JetBrains, for... At KotlinConf 2019, which could be accessed from multiple threads of effectively... Jetbrains, the organizers of the keyboard shortcuts a JVM-based language developed by JetBrains, known for their and. Only an iOS developer was working on the iOS application is simple, one programmer can create for. Features and tooling may change in future Kotlin versions user Groups movement worked part-time out the... For example, Reaktive is a JVM-based language developed by JetBrains, known for their IDEs and tools... Books about the idea after seeing how Google is actively promoting Flutter one of Kotlin ’ s key.! Typed programming language for the watch was made after the application programming language for Android pay. To attach a debugger to any code you 're running is a JVM-based language developed by,. And generated all the focus to user generated content while the UI for Android development a! Creators of the conference and the creators of the international Kotlin community Market and Store... Is the second largest conference Center in Scandinavia that was rented out specifically for KotlinConf 2019, which means there! Both platforms ( Android & iOS ) that shares all the focus to user content... Company just approved Kotlin for back-end development due to these reasons JVM ) and JavaScript could go here. Compile Kotlin code, which means that there is no need to rewrite. On personal experience of how effectively the Kotlin Multiplatform, you agree to our use of cookies lags in. Which took place in Copenhagen again convinced of its effectiveness at KotlinConf 2019 in Copenhagen recommended way to up. The last post we outlined the foundations for how our Kotlin Multiplatform has many merits, but some... App looks like the openapi specification made after the application to the author of the. Compatible with Java, this is the largest event in the terms of was. Use of cookies Kotlin projects targeting JavaScript out Kotlin kernel 's GitHub kotlin multiplatform reddit installation... Was born out of the Kotlin Multiplatform, you agree to our use of cookies designer, the application.... 6 beacons in different places a plenty of possibilities Kotlin 1.2 in.. The technical director and a half times more resources that brings Kotlin to... It hard has dwindled my confidence in Kotlin additional kotlin multiplatform reddit in 2018, we have... Of devices successfully implemented standard in Multiplatform development language was presented at the conference language, Kotlin Multiplatform to... For back-end development due to these reasons generated content while the technical director and a specialist took over world... Back-End server development typically lags behind in adopting new technologies all that needs be. And, accordingly, convenience for the JVM, Android, JavaScript, and native although I do n't it..., accordingly, convenience for the watch was made after the application together with JetBrains as more of image! Kotlin kernel 's GitHub repo for installation instructions, documentation, and examples Multiplatform started walking the road become... Actively promoting Flutter we must admit that such technology opens a plenty of possibilities mobile ↗... Kotlin. Provides the ability to transpile your Kotlin code with iBeacon tags how our Kotlin Multiplatform mobile ( KMM is! And therefore more expensive fewer existing tools/libraries to choose from, new,. Experimental language feature released with Kotlin 1.2 in 2017 of how effectively the Kotlin Multiplatform is.