István Juhos

Compose Multiplatform Preview Tooling Improvements - We're Almost There*!

Sat, 11 Oct 2025 15:00:00 +0200

Abstract

Not so long ago, working with Compose Multiplatform previews could feel… character-building. Previewing composables from common code often meant jumping through awkward hoops. On top of that, the tooling was lacking in features that Jetpack Compose tooling already had in place for a while.

Over the past year, that’s changed drastically. We’ve got a new KMP plugin, CMP preview support in common code, Hot Reload, and a lot more refreshing updates.

When MediaProjection Isn't Enough - Building a Custom In-App Session Recorder

Fri, 26 Sep 2025 10:00:00 +0100

Debugging user issues gets so much easier when you can see exactly what they experienced. While off-the-shelf solutions exist to integrate screen recording into our apps, they didn’t give us the quality, flexibility, or control we needed. So, our team built our own native, in-app session recording tool for Android. In this talk, we’ll share why we decided to go in-house, how we tackled the technical and UX hurdles along the way, and what we learned about recording high-quality video and audio data.

Practical Tips and Tricks to Improve Your Compose Previews

Thu, 04 Sep 2025 23:00:00 +0100

Jetpack Compose Preview is a powerful tool that provides real-time feedback on how our composables are rendered and even on how they behave and animate in certain conditions. In this talk, I’ll give you some tips and tricks on how we can improve our experience with Previews.

Practical Tips and Tricks for Working With Compose Multiplatform Previews

Tue, 03 Jun 2025 11:00:00 +0200

Compose Multiplatform is a game-changer for sharing UI across platforms, but things can still get tricky when it comes to previewing those UIs. Jetpack Compose’s tooling in Android Studio is truly powerful, but what about multiplatform Composables? Check out this talk for more details on the topic!

Practical Tips and Tricks to Improve Your Compose Previews

Sat, 16 Nov 2024 01:00:00 +0100

Practical Tips and Tricks to Improve Your Compose Previews

Mon, 16 Sep 2024 15:30:00 +0200

Practical Tips and Tricks to Improve Your Compose Previews

Tue, 30 Jul 2024 14:22:30 +0200

Practical Tips and Tricks to Improve Your Compose Previews

Thu, 04 Jul 2024 14:00:00 +0200

Compose Migration Side Effects - What Can Go Wrong?

Fri, 24 May 2024 12:00:01 +0200

Android development has been revolving around the adoption of Compose lately. Compose is still the shiny, new, declarative - and now also multiplatform - way of building UIs. However, there are tons of projects out there that were built with Views, UIKit, or other favored UI solutions of platforms, while engineers also accumulated knowledge about all the quirks, issues, and workarounds with the framework they had to use or have chosen. In this talk, we’ll look at some less-than-ideal scenarios when jumping on the Compose train in a project unprepared might cause long-term headaches, and how we can avoid falling into future traps that we unconsciously set up today.

Compose Migration Side Effects - What Can Go Wrong?

Tue, 30 Apr 2024 18:55:00 +0200

Compose-View Interop in Practice

Tue, 23 Apr 2024 09:30:00 +0200

If you’re working on an already established, large code base, there’s a good chance that your screens still use Views to some extent. However, these screens should still be maintained to keep UI consistency across your app. In this talk, we’ll look at how we can support the maintenance of such screens and custom UI components with Jetpack Compose’s interoperability features while discussing the ups and downs of having hybrid UIs in our apps.

Jetpack Compose - Az Android fejlesztés jövője

Mon, 12 Feb 2024 19:00:00 +0100

A Cubix által szervezett webináriumon, illetve kerekasztal beszélgetlésen Bakos Gáborral, Ekler Péterrel, Péter Gergővel, és Váradi Gáborral beszélgettünk a Jetpack Compose használatáról és helyzetéről az Android fejlesztői világban.

Compose-View Interop in Practice

Sat, 02 Dec 2023 00:00:00 +0100

Abstract

Adopting Jetpack Compose Safely

Fri, 29 Sep 2023 00:00:00 +0100

Co-speaker - Marco Gomiero

Abstract

If you want to start adopting Jetpack Compose in an existing, large codebase worked on by multiple teams, you can’t just add the dependency and start creating composables right away. In such projects, there are already established conventions and architectural decisions that such a revolutionary change might disrupt.

In this talk, we will share our journey of integrating Compose into the TIER app while offering practical tips for tackling common challenges that arise when working with large-scale codebases, like:

Adopting Jetpack Compose Safely

Thu, 06 Jul 2023 00:00:00 +0200

Co-speaker - Marco Gomiero

Abstract

In this talk, we will share our journey of integrating Compose into the TIER app while offering practical tips for tackling common challenges that arise when working with large-scale codebases, like:

Compose-View Interop in Practice

Fri, 09 Jun 2023 00:00:00 -0700

Composing a Design System

Tue, 30 May 2023 00:00:00 +0200

Abstract

At TIER, we took the leap and adopted Jetpack Compose into our quite large code base. One of this journey’s most significant milestones was having our design system, Octopus, implemented in pure Compose UI. In this talk, I present how we built Octopus with Compose, what we gained by reimplementing components instead of wrapping existing Views in AndroidView, and how we managed to support the still-View-based parts of our app with Compose.

How to Test Your Compose UI (short)

Sat, 04 Feb 2023 00:00:00 +0100

Note: This is a shortened version of How to Test Your Compose UI.

Abstract

While Compose is easy to adopt, not creating legacy code right at the start of such a journey requires extra planning, awareness, and, most importantly, testing. We’ll have a look at how we can test pure Compose UIs as well as hybrid ones that have Views and composables too.

In this talk, we’ll learn what the semantics tree is, its relation to the composition, how we can manipulate it in composables using the Semantics modifier, how we can implement composables with testability in mind, and how we can test pure Compose, and hybrid UIs.

Working with Workmanager

Mon, 30 Jan 2023 00:00:00 +0100

A talk about the basic concepts of WorkManager and how to use the library. Given at the Android Budapest Meetup in 2019.

Composing an Octopus

Thu, 01 Dec 2022 00:00:00 +0100

Abstract

At TIER, we’re in the process of adopting Jetpack Compose into our quite large code base. One of the most significant milestones of this journey was to have our design system, Octopus, implemented in pure Compose UI. In this talk, I’ll present how we built Octopus Compose, and what we gained by reimplementing components instead of wrapping existing Views in AndroidView.

Check out the slides

Watch this talk

Resources

Jetpack Compose design system docs
https://developer.android.com/jetpack/compose/designsystems

Adopting Jetpack Compose Safely

Thu, 24 Nov 2022 00:00:00 +0100

Abstract

If you want to start adopting Jetpack Compose in an existing, large codebase, worked on by multiple teams, you can’t just add the dependency and start creating composables right away.

In such projects, there are already established conventions, processes, and architecture decisions that will be disrupted with such a revolutionary change as Compose, since it requires a mental model shift towards declarative patterns.

In this talk, we will show the process that led us to a harmless integration of Compose into the TIER application, focusing on tooling, architectural changes, the evolution of our design system, and how we managed to get our developers onboard for all of the above.

How to Test Your Compose UI

Wed, 05 Oct 2022 00:00:00 +0100

Abstract

While Compose is easy to adopt, not creating legacy code right at the start of such a journey requires some extra planning, awareness, and, most importantly, testing. We’ll have a look at how we can test pure Compose UIs as well as hybrid ones that have Views and composables too.

In this talk, we’ll learn what the semantics tree is, what is its relation to the composition, how we can manipulate it in composables using the Semantics modifier, how we can implement composables with testability in mind, and how we can test pure Compose and hybrid UIs.

How to Test Your Compose UI

Thu, 07 Jul 2022 00:00:00 +0100

Abstract

While Compose is easy to adopt, not creating legacy code right at the start of such a journey requires some extra planning, awareness, and most importantly, testing. We’ll have a look at how we can test pure Compose UIs as well as hybrid ones that have Views and composables too. In this talk, we’ll learn what the semantics tree is, what is its relation to the composition, how we can manipulate it in composables using the Semantics modifier, how we can implement composables with testability in mind, and how we can test pure Compose and hybrid UIs.

Flutter Under the UI

Thu, 26 May 2022 00:00:00 +0100

Abstract

As Flutter app developers, we should take care of much more than UI tasks while developing applications for supported platforms. UI and app state handling, dependency injection, networking, and so on are all on the menu, just as in any other app development domain. This talk highlights some frequently used architectures and packages preferred by the Flutter community itself. Presented at the May 2022 installment of the HWSW free! meetup series (online) in Hungarian.

How to Test Your Compose UI

Tue, 03 May 2022 00:00:00 +0100

Abstract

Jetpack Compose is the new and shiny framework that can finally replace XMLs and the View system in Android projects. While Compose is easy to adopt, not creating legacy code right at the start of such a journey requires some extra planning, awareness, and testing. In this talk, you’ll have a quick look at how you can set up, write, and run Compose UI tests and how to write testable composables.

Jetpack Compose - The Future of Android Development

Wed, 20 Apr 2022 00:00:00 +0100

Abstract

In this talk, we take a glimpse at what Jetpack Compose is in a nutshell, how we can start building an app with it, and how we can introduce it to an existing project. Presented at a Webuni Android webinar on 2022.04.20., online, in Hungarian.

Check out the slides

Watch this talk

Resources

The demo project
https://github.com/stewemetal/android-view-vs-compose

Jetpack Compose - The Future of Android UI in a Nutshell

Wed, 08 Dec 2021 00:00:00 +0100

Abstract

In this talk, we take a glimpse at what Jetpack Compose is in a nutshell, and how will it transform how we write Android apps in the near future. Presented at the HWSW free! mobile development meetup on 2021.12.08., online, in Hungarian.

Check out the slides

Watch this talk

Resources

The demo project
https://github.com/stewemetal/hwsw_meetup_compose_demo

Flutter App Architektúrák

Tue, 21 Jul 2020 00:00:00 +0100

Flutter seems to be all about Widgets, especially UI Widgets. But as app developers, we should take care about much more while developing applications on any platform.

App Architecture Concept in Flutter

Thu, 06 Feb 2020 00:00:00 +0100

A talk about an MVI-ish, MVVM-ish, clean Flutter app architecture concept. Given at the Flutter Budapest Meetup in 2020.

Simplifying Background Tasks with Workmanager

Tue, 07 May 2019 00:00:00 +0100

This talk is a short intro to the WorkManager Android library. Given at Google I/O Extended, Budapest, in 2019.