Issue #469

June 6th, 2021

Articles & Tutorials

link image   A Cautionary Tale (

Adam Bennett shares a post mortem on how he accidentally pinged every Android customer in production, and a little bit of advice so that it doesn’t happen to you.

Compose - List / Detail: Foldables (

In this article, Mark Allison shows how Compose makes it relatively easy to handle the logic of whether to show a side-by-side layout or a two-page layout depending on the screen size.

link image   Passwordless authentication using the SIM Card (

Access the authentication mechanism used by Mobile Network Operators. Integrate tru.ID APIs to verify real mobile phone numbers and replace SMS 2FA with a new SIM-based method.

How to create Bottom Navigation Bar with Jetpack Compose (

John Codeos walks through step-by-step how to add a bottom nav bar with Jetpack Compose.

The ABC of Modularization for Android in 2021 (

Christopher Elias' goal with this article is to make sure you have a better understanding of modularization.

How to mock under instrumentation test with MockK and Dexopener (

In our effort to keep the benefits of UI tests while at the same time increase the stability, Tim Rijckaert and his team converted a big chunk of our test cases to test fragments in isolation.

Navigation in Feature Modules (

In the previous article, you learned how to use navigation in a multi module project. Next, Murat Yener takes it a step further and converts the coffee module to a feature module.

Recapping building across devices (

At Google I/O this year, they presented about how your app can take advantage of Android's different screens, both large and small. Here are the top things you should know!

From Junior to Master in Kotlin — 2 (Safe null) (

Gerardo Lopez Falcón continues his series on Kotlin programming, this time covering null safety in Kotlin.

Efficient lists with DiffUtil and ListAdapter (

This article by Anthony Kiniyalocts shows you how to leverage DiffUtil and ListAdapter to avoid pitfalls, and provide a more efficient user experience, while reducing boilerplate code.

The Kotlin modifier that shouldn't be there (

Danny Preussler takes you on a journey and shows that sometimes you might need a "final val" on a property.

Kotlin Coroutines and Swift, revisited (

Russell Wolf writes an update about his approaches to interop between Kotlin coroutines and RxSwift.

QA engineers, functional and UI testing (

This is the second in a series of blog posts in which Mirek Stanek outlines Android app testing. Here he covers QA engineers, functional and UI testing.


Place a sponsored post

link image   Place a sponsored post & reach over 66k Android devs (



Android App Developer (Cologne or remote)

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Android Developer (London)

About the role • Programming of software products, features and services for Google’s Android platform within the mobile product roadmap. • Participation in software design, estimation of development tasks, unit-testing, QA process, troubleshooting & code debugging • Liaison with partners

Lead Developer Kotlin (Paris, France)

BAM is looking for a lead developer Kotlin to take part in its growth (+500% since 2015). Your goal is going to help our clients tackle their business problems thanks to mobile apps by using the lastest technologies.


Libraries & Code

CompleteKotlin (

Gradle Plugin to enable auto-completion and symbol resolution for all Kotlin/Native platforms.



link image   Enter the Indie Games Festival from Google Play (

Submit your game to this competition if you want to get featured on Google Play and win promotions and other prizes that will give your game the recognition it deserves.



link image   FlowMarbles (

Interactive diagram of Kotlin Flow operators


Videos & Podcasts

link image   How To Digest Google I/O (

Nate Ebel covers how to digest Google I/O and other developer events so you can stay up to date with the latest developer news.

How to Pick What Technology to Learn Next (

In this episode, Donn answers a listener’s question. The listener wanted to know how to choose what to learn next in Tech.

Material Witnesses (

In this episode, Chet and Romain welcome Hunter and Nick from the Material Design team

Five Highlights From the Kotlin Roadmap 2021 (

JetBrains updated the Kotlin roadmap to share the new plans for 2021 and beyond! In this video, learn about the five most exciting highlights from this update

Friends App Android Client Ep18 (

Jov Mit continues the refactoring from the last episode, pushing the data from the shipping code towards the tests so that the abstractions will live in the shipping code, and the data will stay in the tests.

Navigation in feature modules (

On this episode of the second MAD Skills series on Navigation, Murat will demonstrate a live coding session on using the Navigation component in feature modules.

Where Did My Jetpack Compose Modifier Go? (

In this video, Adam McNeilly goes over a common confusion when learning Jetpack Compose - why are some Modifiers unresolved when I try to make my own composable?

refreshVersions with Louis CAD (

Talking with Louis CAD about refreshVersions, a Gradle plugin to help you keep your third-party dependencies up to date.