I'm always surprised by how many people don't know about the Kotlin Slack community. It's a fantastic place to discuss issues with others, with dedicated channels for almost any Kotlin topic, and lots of JetBrains people monitoring them too.

So glad this is finally out! androidx.webgpu brings the WebGPU API to Android developers. Having access to a modern GPU API in Kotlin without dealing with the OpenGL legacy nor the complexity of Vulkan is exciting! developer.android.com/jetpack/andr...

New blog post on how to render beautiful soft shadows projected by the user's finger with Jetpack Compose. www.romainguy.dev/posts/2025/f...

If they ever get around to building this thing, it should be bulldozed on Day 1 of a new administration. No messing around, no hemming and hawing about procedure or costs. Order heavy equipment in and start knocking it down immediately, as surely as an overthrown tyrant's statues would be torn down.

Jesse and Jake were my CN Tower. I only worked with them occasionally, but I always felt reassured just knowing they were around if I needed help. I'm mad our company lost both of them in the same week, and I'm afraid the entire Android OSS community will feel the ripple effect in the days to come.

Perfetto performance traces can be very intimidating. A talk by perf wizard @rahulrav.com makes it a tiny bit less scary. youtu.be/WJHNBN_19F8?... #performance #android

they broke out the novelty scissors for these two

I talked to Jack from @tuple.app about my love of pair programming, and other things

That's pretty cool, maps.google.com seems to be using Filament now. I found its symbols in the WASM file used by the site.

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...

So upset for Vlad, he willed that double down the left field line and got left on base 90 feet away 😭 Pinch hit for Kirk? Yamamoto should be the MVP. Impressive. He's like the Japanese Pedro.

I just discovered the WindowInspector.addGlobalWindowViewsListener() API in Android version 36.1 #AndroidDev Commit: cs.android.com/android/_/an... Happy to see a request for a new API land! (I officially asked in 2023 & unofficially for many years before issuetracker.google.com/issues/29031...)

The latest Oxide & Friends covered the benefits of code that splits making vs. executing plans. I love that pattern so much! Last year I wrote about how I use it. publicobject.com/2024/03/10/d...

Wrote a lot of thoughts on junior developers, AI, and what I strongly feel is going to become the defining challenge of our industry's next generation. www.zacsweers.dev/forklifts-re...

Okio 3.16 is faster if you have hundreds of threads 🚂

Today I was facing a gnarly somewhat mechanical migration and figured maybe I should try this AI thing. First stab seemed ok, but many unrelated changes. So I said: revert, try again with no unrelated change. Here's what the LLM responded: "I micts\adelphia αsask齿ormaliy ibrahim郭 kepαt debug" 👍

We conflate 2 different things when we talk about "velocity" - External velocity: how fast we ship features - Internal velocity: how fast we make code changes They're connected but different. #AndroidDev

People have been asking for the Git client from IntelliJ to be available as a standalone app for almost a decade. You can now get it in early access - see the link below for details! lp.jetbrains.com/clo...

I wrote a blog post re-introducing Paparazzi's accessibility snapshots, highlighting the many recent updates they have gone through! code.cash.app/paparazzi-ac...

PROGRAMMER: I've saved so much time! NARRATOR: They did not save any time whatsoever. In fact, they spent as much time as they claimed to have saved. Again. bsky.app/profile/metr...

OkHttp 5.0 has a stable API. 🗿

I am surrounded by people who are outsourcing their own thinking to ChatGPT and they are quickly and obviously becoming dependent on it for even the most banal tasks. Once again, the "figuring it out" is the important part. Yes, you can use a crane to lift weights but you will not get stronger

Knowing how Compose injects the Composer, wraps groups, and tracks remember scopes gives you full control over recomposition. It is the difference between hoping your code is efficient and knowing it is. That is the value of understanding internals.

And this will also be the best talk of #droidconNYC2025: nyc.droidcon.com/speakers/tom.... github.com/block/stoic is pure witchcraft #dcnyc25 #droidcon

New blog post! In this post I explain some of the techniques used to eliminate unnecessary array bounds checks when writing Kotlin code. www.romainguy.dev/posts/2025/e...

‘This is not a talk about that reasonable coroutines use.’ I’m speaking at Droidcon NYC in June nyc.droidcon.com/jesse-wilson/

*I'm* speaking at Droidcon NYC? About *Compose*? Who approved this?! nyc.droidcon.com/brian-norman/

My talk was accepted! Hopefully I'll see some of you at @droidcon.bsky.social NYC in June 💚 nyc.droidcon.com/matt-mckenna/ #dcnyc25

I'm speaking at DroidconNYC 2025! Talking about Compose multiplatform, adaptive apps for multiple screen sized, media, oh and how they fit into an open source bluesky client! nyc.droidcon.com/tunji-dahunsi/

I found myself doing a lot of nodding when reading this post pluralistic.net/2025/04/27/s... It feels so true that as a tech worker it has become harder and harder to prevent enshittification.

It's cool that the leak is fixed, but our codebase is not ready yet for Compose 1.8... (👋 @zachklipp.com). This was detected in UI tests, and we'd rather not disable leak detection in tests, so we hacked a fix that resets a the Lazy holder for SharedTransitionObserver. Rate this hack 😘

Yay, Block (née Square) has a new engineering Blog! engineering.block.xyz/blog/

New Square Feature Allows Customers To Tip With Bible Quote theonion.com/new-squ...

I really wish we'd heard more from tech companies that have embraced remote, no RTO, aren't throwing away DEI initiatives, etc. They're going to steal top talent from the shit show that Google & Facebook have become. I know Square / Block is one of those good tech companies. What else?

3rd time's the charm!

Playing with these Meta RayBans

Never a debate in my head, fakes for the win

What about actions that trigger a network call, show a loader and then later shows a result? Stop using idling resources, they're dumb. They make your tests rely on implicit behavior which is a recipe for flakiness. BAD: clickButton() Thread.sleep(2000) // waiting for network assertResultUI()

New blog post! Last time we saw that the compiler can mess with your benchmarks. Well, so can the CPU! www.romainguy.dev/posts/2024/t...

Do your teams work in public channels (which, as I understand it, is how folks at Slack itself work) or are your teams hiding their decision & investigation process in private channels, Apple style culture? I shared this with our mobile org recently (400+ people). #AndroidDev

Benchmarking can be tricky! In this blog post, I show an example of how easy it is to get the wrong results and how to fix it: www.romainguy.dev/posts/2024/y...

Me

12x difference between the top and bottom quartiles (for WFH) is eye opening. Even for in-office, that difference is 5x.

JetBrains just merged my contribution to the Kotlin standard library. It's a rewrite of String.toFloatOrNull() to eliminate all allocations (~940 per call!) and go 225x faster on a Pixel 6. If you want to see how it was done: github.com/JetBrains/ko... tl;dr regex out, hand-written parser in

👋📢 #Android & #kotlin devs, you should be using `kotlin.time.Duration`. No more unit errors with "duration: Long", no more awkward TimeUnit conversion API, and it gets compiled to a long, no alloc! Love it. Found a great summary by @jlengrand.bsky.social: lengrand.fr/measuring-ti... #AndroidDev

Here's a fun #AndroidDev architecture design problem: Implement a slider that edits state that is stored on disk. I think working through this task can reveal a lot of insight for why building great UI around asynchronous tasks can inherently be tricky and how tradeoffs are necessary.

Let's look at Bluesky performance on Android! I managed to build a release build of the app and ran some traces, let's see what we can find... I have ~hour, will add to this thread as I investigate