Ralf

App Platform Launched App Platform is a lightweight application framework for state and memory management suitable for Kotlin Multiplatform projects. I'm happy to announce that we open-sourced the project today! amzn.github.io/app-platform/

I measured how much faster an agent can navigate an app and read its state by skipping the UI. Spoiler alert: the difference is significant. Another reason to decouple your business logic and navigation entirely from the UI layer. ralf-wondratschek.com/blog/headles...

I'm excited to share that I joined OpenAI this week, where I'll be working on Android infrastructure. My second stint at Block was shorter than expected, but I'm grateful for the time together with my team. I'm proud of what we accomplished and excited for what's next.

I've used Metro, and it's better than anything else, imo. It not only speeds up your builds, but makes DI easier, and also provides simpler upgrade paths if you're transitioning from other common DI frameworks. Huge thanks to @zacsweers.dev

Thank you, Zac!

I picked up some work on App Platform again, which I created during my time at Amazon. Metro now works perfectly well in KMP projects and therefore it's the recommended default! The latest version also comes with a compiler plugin to avoid KSP. github.com/amzn/app-pla...

Joel and Jacob are two of the most talented (and most pleasant!) people I have ever worked with.

We're wrapping up our migration to Metro internally for Square Android. I summarized some of our challenges and steps we took in a blog post. If you use Dagger 2 for a Kotlin project, then you should migrate to Metro sooner rather than later. engineering.block.xyz/blog/metro-m...

This is one of the best podcast episodes I have listened to in a while. Highly recommend podcastaddict.com/the-peterman...

I'm more excited about this than I should be.

KotlinPoet 2.3.0 supports typealias declarations inside types, has new convenience API for adding annotations and ships with a healthy dose of bug fixes. Time for a version bump! 🤜🤛 github.com/square/kotli...

One underrated improvement Metro brings is its easy setup. No more configuring KAPT, runtime modules, keeping versions in sync, etc. You apply the Gradle plugin, setup a tiny graph and the rest is driven through constructor injection, @ContributesBinding and its other features. This was all I needed

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Actually, OpenJDK 25 is 18% faster than OpenJDK 17 and 21 and a whopping 84% faster than OpenJDK 11. Upgrade now!

I recently migrated our codebase away from Ktlint to Ktfmt and Detekt. I summarized the reasons and migration steps in a blog post: engineering.block.xyz/blog/adoptin...

Kotlin compiler plugins are amazing! ✅ Expressive syntax ✅ Compile-time checked ✅ Fast at runtime

Cash Android has recently switched to Metro, a new, fast dependency injection framework built for K2. That was a fun project and we're really happy with the results! Sharing details on how we approached the migration to help teams adopt Metro: code.cash.app/cash-android...

This is fantastic and @zacsweers.dev deserves all the praise but it also is gonna give you a false idea of what Z is like as a maintainer and author, what the project is like, and how you might achieve something like this yourself

I've been using ktfmt over KtLint for a few months for some projects. It's a blessing and so much easier to deal with. I forgot how much I missed 2 space indent in Kotlin. facebook.github.io/ktfmt/

We published a new version of App Platform with back button support. We also added recipes for saving presenter state, app bar integration and backstack navigation. Working with Compose in the business logic (Molecule) and UI (Compose Multiplatform) is so much fun. amzn.github.io/app-platform...

Anvil was quite successful inside and outside of Square, but now it's time for the next big improvement. Metro is 95% of what I pitched as Dagger 3 within Square. I'm excited.

Version 0.34.0 of the gradle-maven-publish-plugin finally comes with configuration cache support. Dropping support for Sonatype OSSRH unblocked us from waiting for Gradle to resolve the underlying issue on their side. github.com/vanniktech/g...

I had problems upgrading to the latest version of IntelliJ IDEA and Android Studio with the new Kotlin Multiplatform plugin. But now that it's working and Compose Hot Reload is running the integration is pretty nice. (This was my issue: youtrack.jetbrains.com/issue/KMT-11... )

This is great. Unlimited PTO is a trap. Amazon works very similar to Bolt and learnt to like this a lot. www.kron4.com/news/technol...

The new version of App Platform is out with support for Wasm! The wiki has integrated the Wasm sample application from the repository to see the code in action. amzn.github.io/app-platform/

The problem was very well summarised and the solution well explained. Great talk!

Kotlin Conf is great and a lot of fun. I'm closing today with my session "Scale your Kotlin Multiplatform projects using dependency injection". I hope some folks are still around and don't travel home yet 😊 kotlinconf.com/schedule/?da...

Indeed, we improved every parts of ADB Wifi pipeline. Besides support in Studio, you need ADB 36.0.1 (to be released soon) and Android 16.

I'm waiting for the AI agents from German companies named Günther, Jürgen or Klaus.

Where does one start with improving Android app performance? Should I start with writing benchmarks to establish a baseline? Should I enable StrictMode and LeakCanary first? How can I implement metrics in production? Are there any good guides for beginners you'd recommend?

That's me! I'm really excited about this topic and look forward to giving this talk at KotlinConf. I'll summarize how we got here and how painless dependency injection can be.