I just released the first part of „Refactoring with Gemini in Android Studio - Behavior Tests as Guardrails“ on my YouTube channel! I explain what refactoring actually is, why it matters with AI & why Behavior Tests are so important. Part 2 already in the making! 🏗️ m.youtube.com/watch?v=3v2l...

🚀 I've started a new YouTube channel on Android development with AI, and the first video is out! Generate Android Code from Pull Request Comments with GitHub MCP + Gemini Hope somebody finds it useful 😊 www.youtube.com/watch?v=nEoc...

🎉 𝐂𝐨𝐦𝐩𝐨𝐬𝐚𝐛𝐥𝐞𝐏𝐫𝐞𝐯𝐢𝐞𝐰𝐒𝐜𝐚𝐧𝐧𝐞𝐫 0.8.0 𝐢𝐬 𝐨𝐮𝐭! github.com/sergio-sastr... This release brings 𝑪𝒐𝒎𝒑𝒐𝒔𝒆 𝑴𝒖𝒍𝒕𝒊𝒑𝒍𝒂𝒕𝒇𝒐𝒓𝒎 𝒔𝒖𝒑𝒑𝒐𝒓𝒕 to the next level 🚀 You can now scan Android @Previews on desktop and JVM, which is supported thanks to CMP’s commonised @Preview (≥ 1.10.0-beta02).

🚀 𝐀𝐧𝐝𝐫𝐨𝐢𝐝𝐔𝐢𝐓𝐞𝐬𝐭𝐢𝐧𝐠𝐔𝐭𝐢𝐥𝐬 2.8.0 𝐢𝐬 𝐡𝐞𝐫𝐞! github.com/sergio-sastr... 🎉 It brings 𝘧𝘶𝘭𝘭 𝘍𝘰𝘯𝘵𝘞𝘦𝘪𝘨𝘩𝘵 𝘴𝘶𝘱𝘱𝘰𝘳𝘵 including Roborazzi & cross-library screenshot tests for any UI component: ✅ Activity ✅ Fragment ✅ View ✅ Composable

👨‍💻My droidcon talk „Let‘s @Preview the future: Automating Screenshot Testing in CMP“ is out! 👇 www.youtube.com/embed/zYsNXr... I covered Preview Screenshot Testing for ✅ Android (including animations) ✅ Desktop ✅ Common Hope you enjoy it almost as much as I did! #dcbln25

🛝 Just updated the 𝗔𝗻𝗱𝗿𝗼𝗶𝗱 𝗦𝗰𝗿𝗲𝗲𝗻𝘀𝗵𝗼𝘁 𝗧𝗲𝘀𝘁𝗶𝗻𝗴 𝗣𝗹𝗮𝘆𝗴𝗿𝗼𝘂𝗻𝗱! All the libraries are now on their 𝒍𝒂𝒕𝒆𝒔𝒕 𝒗𝒆𝒓𝒔𝒊𝒐𝒏𝒔, so you can try screenshot testing with the most up-to-date tools! 👉 github.com/sergio-sastr... #AndroidDev #Testing

See you tomorrow @droidcon.bsky.social where I‘ll be talking about 📸 Automating Screenshot testing in CMP with @Previews youtube.com/shorts/q5Kmx... Just right after the keynote 😉

Thanks to everybody who attended my talk at Droidcon Lisbon! 🔎 Let's @Preview the future: Automating Screenshot Testing in CMP It was a blast! You can already find the slides in my SpeakerDeck👇 speakerdeck.com/gio_sastre/l... ...or even better, watch me live at Droidcon Berlin in a few weeks! 😉

🇵🇹 Super excited to be talking at Droidcon Lisbon in 2 days again! I’ll start with a quick screenshot testing intro & then take on the challenge: ⚡️ In ~20 mins of live coding, I’ll spin up automated screenshot tests from Compose Previews: Android, Desktop & Common. Let’s make it happen 💪

🔥 ComposablePreviewScanner 0.7.0 is out! It packs 2 new features: ✅ Supports Glance Previews, helping auto-generate screenshot tests from them with any screenshot testing library ✅ Same for Compose Multiplatform Previews in common code Give it a try👇 github.com/sergio-sastr...

Did you know you can use Compose previews with Compose Multiplatform now? I wrote a quick blog post about how to get started with them. zsmb.co/compose-mult...

Built a Gradle plugin to auto-generate Paparazzi screenshot tests from @Preview composables with ComposablePreviewScanner! Not published, just a showcase to avoid boilerplate in multi-module setups. Inspired by Roborazzi, built with Firebender 🔥 👉 github.com/sergio-sastr...

🥁 Big news! The first batch of speakers for #dcbln25 are LIVE — & we’re kicking things off with a banger ⚙️ @marcinmoskala.bsky.social goes over how to master async debugging in #Kotlin – learn to fix #coroutine bugs, boost performance & avoid pitfalls in #Android berlin.droidcon.com/speakers/mar...

GDE Summit in full swing! With @sinankozak.bsky.social #GDESummit2025

#mDevCamp 2025 is just around the corner! Swing by the Concrete Break room next Tuesday afternoon — I’ll be sharing some practical tips & tricks for working with Compose Multiplatform Previews. See you there! 😉 mdevcamp.eu/schedule...

I'll be giving my first talk of the year for the Kotlin User Group Munich, at Google offices. This time I'll talk about Screenshot Testing in CMP with some live coding! There's already a waiting list, but if you're joining, come to say hello! www.meetup.com/kotlin-user-...

📸 Paparazzi 2.0.0-alpha is out! github.com/cashapp/papa... Main focus on accessibility improvements!

Nothing better than sports to help with your physical and mental health… This session I was on fire 🔥🔥🔥 Although it took me a while to warm up, once I turned on the camera I did not fail any trick, except the last one, which took me around 5 attempts

1. Team does not meet sprint goals often, but never misses a deadline and has very low bug rate 2. Team meets all sprint goals, but misses deadlines sometimes and has noticeable bug rates. The main reason why I dislike Scrum A LOT is because it favours working like team 2. Don‘t be team 2 🙏

Unit testing each class of a system in isolation sounds good in theory: It ensures each piece works on its own. The hard truth is that it’s a practice that normally produces almost no value 🤷‍♂️ But it is even worse: it creates a false sense of safety and swallows lots of time from developers 🧵

Celebrating 10 years married! 🎉 A walk through Olympia Park, a slice of cake, and a reminder that the little moments are the big ones ❤️

It's a double feature this week 🤠 - Medium: Debugging Coroutines in IntelliJ and Android Studio - Spotify: Kotlin Khronicles ep2 Thanks @kotlinweekly.bsky.social for bringing together the global community 💯

Un gran desarrollador no es quien sabe más lenguajes o frameworks. Es quien convierte problemas complejos en soluciones sencillas.

Now that Android Studio Narwahl is out…Do you know that you can also auto-generate screenshot tests from @Previews in “common” using 𝐂𝐨𝐦𝐩𝐨𝐬𝐚𝐛𝐥𝐞𝐏𝐫𝐞𝐯𝐢𝐞𝐰𝐒𝐜𝐚𝐧𝐧𝐞𝐫 ? github.com/sergio-sastr... There is already an executable example in the 𝐑𝐨𝐛𝐨𝐫𝐚𝐳𝐳𝐢 library 👇 github.com/sergio-sastr...

Come join @skydoves.bsky.social, myself and the rest of the team to help apps make more money! 🙌

I’ve been using🔥Firebender AS plugin for coding in Android and oh man, first time I truely believe there is a useful AI tool for Android development🙏 I strongly recommend to give it a try firebender.com

𝗪𝗼𝗻𝗱𝗲𝗿𝗶𝗻𝗴 𝗵𝗼𝘄 𝘁𝗼 𝘁𝗲𝘀𝘁 𝗨𝗶 𝗔𝗻𝗶𝗺𝗮𝘁𝗶𝗼𝗻𝘀 𝗱𝗶𝗿𝗲𝗰𝘁𝗹𝘆 𝗳𝗿𝗼𝗺 @𝗣𝗿𝗲𝘃𝗶𝗲𝘄𝘀? Look no further… 🤖 Roborazzi 1.44.0-alpha01 is out! github.com/takahirom/ro... 🧪This is something experimental and @takahirom.bsky.social and I would love to hear your feedback to shape its api!

Code Review Tip: When building UI-related features, include screenshots and/or a short demo video to your PR. This dramatically simplifies the review process as visual context helps catch design inconsistencies that might be missed in a code-only review.

Hello from Kuala Lumpur 🇲🇾!

Amen! dannorth.net/best-simple-...

1/4 Stop writing endless screenshot tests. Android developers waste hours writing almost identical screenshot tests. Here’s a tip to write less code without compromising coverage: • Replace multiple test cases with parameterized tests • Configure valid input parameters for every test

Literally me right now in 🇻🇳 www.instagram.com/reel/DGFuDrT...

There is a lot of buzz about DeepSeek models and their efficiency. I tried them and oh my! They're very good! I use them for coding and other stuff as well. I wrote this blog to help you integrate the model locally for FREE. Enjoy coding! 🚀 🔗: www.mal7othify.com/post/deepsee...

I’ve upgraded examples in 🛝Android Screenshot testing playground to newer versions: ✅ AndroidUiTestingUtils 1.5.0 -> 1.6.0 ✅ Paparazzi 1.3.4 -> 1.3.5 ✅ Roborazzi 1.26.0 -> 1.41.1 ✅ Compose Screenshot alpha07 -> alpha08 Check it out 👇 github.com/sergio-sastr...

The last couple of lint rules I wrote have caught multiple violations this week and already saved valuable review times and possible mistakes. I love seeing results of checks.

Lately I’ve seen & suffered the consequences of teams not discussing out requirements that added too much complexity for very little value for the user. The best engineers I’ve worked with always tried to avoid complexity not to build 💩 on 💩 & that is way more important than being technically great

Composable Preview Scanner 0.5.1 is out! github.com/sergio-sastr... 🆕 Support XR devices in the preview parameter “device” 🛠️ Supports Previews with default parameters 🛠️ Supports Previews with same class & method names but different signature

Why some devs ❤️ to write unnecessary overcomplicated solutions? These’re the 1st that shoot back, with side victims. Your features were using that api, they changed internals without informing & suddenly you get a bunch of 🐞 & stress. This has been the most stressful week in 11 years as dev KISS

Yesterday I talked with @jovmit.bsky.social’s amazing Android community about: ✅ Fast feedback Loops ✅ How to get them with Previews & Screenshot Tests ✅ Demo on how to integrate Composable Preview Scanner with Paparazzi to auto-generate Screenshot Tests out of Previews Links below 👇

Hay una cosa peor que no tener tests xurxodev.substack.com/p/hay-una-co...

I was watching yesterday‘s match with my dear „blog post“ reviewer Pablo, a Real Madrid fan. Still hard to believe Real Valladolid promoted to La Liga last year… Happy at least that they could show they have not „surrendered“ yet… although it was 0-3 against 😅

A very important thing when implementing a library: ❌ Meaningful error messages Today Hilt was complaining about a “missing Provides method” It was mega misleading, since it had to do with a variable not having the right scope… 🙏 Please, never implement error messages like in Dagger…

Latest Android Weekly Issue 658 is out! androidweekly.net/issues/issue... #AndroidDev #Kotlin

I believe someone has given a talk about ComposablePreviewScanner because It’s been starred many times in the last 24h. Whoever you are… I highly appreciate it 🙏 github.com/sergio-sastr...

Just published a post about the tests_regex instrumentation argument for Android UI Tests. handstandsam.com/2025/01/15/r... #android #testing

Let’s say the “architect” of your project, made up of 4 teams, tells you that he’d like we write more integration tests with Appium and get rid of the redundant unit tests. Your team seems to be the only one against, argumenting that it hinders “fast feeback” loops… What would you do in this case?

Have you ever wanted to be evil and start using `internal` types of a Kotlin library? You totally can and here is how www.liutikas.net/2025/01/12/K... Also, if you do this to AndroidX libraries we'll 100% break you! #kotlin #gradle

ComposablePreviewScanner 0.5.0 is out! github.com/sergio-sastr... If you find any issue, feel free to report it 😊

Finally back home in Munich and I also managed to finish this 😊 Promise to release ComposablePreviewScanner 0.5.0 as soon as I find time, likely tomorrow 🫶