When migrating to Compose you may have come upon the DropdownMenu or the ExposedDropdownMenuBox + ExposedDropdownMenu. These APIs provide an easy interface for showing a list of items in a dropdown menu to let users pick a choice of items. However, if you have more than just a few items…

Are you migrating to Compose but can’t get your AnimatedStateListDrawables to work? Here’s a solution that worked pretty well for me 👍 Some background… While trying to migrate BottomNavigationView to the Compose NavigationBar (Material3) I got stuck on errors when loading my icons in Compose. In my app, I’ve created AnimatedVectorDrawables using…

The Kotlin Inline (Value) class is a relatively new feature of the Kotlin language as it recently got a stable release in Kotlin 1.5. I first heard about Inline classes way back when I was on Kotlin 1.3 and the promises it made about being a better type-safe alternative to…

LiveData is a great tool to use when working with Android Architecture Components. Before I knew how to use the Transformations class, I was abusing LiveData and creating a lot of code-smell. …

In case you have tried writing Unit tests for your application business logic but gotten stuck at testing your Room logic where some database calls are wrapped in a runInTransaction call, I just figured out how to stub it using MockK and thought I’d share it. Background This summer I thought…

This is a short tutorial/intro on how to set up and use Robolectric to create Component tests for your custom views. If you‘re not familiar with Robolectric, it’s a library which, instead of using an Emulator/Device, allows you to Unit test your Android application. …

Converting Java to Kotlin Runtime bugs are scary! When you blindly convert Java to Kotlin you may have introduced them without knowing. I did when I converted my first project. Then I did it a second time, had I learned nothing? I recently read the article Curious case with Fragment’s onCreateAnimation() which got me…

LiveData and ViewModel are two awesome new additions to the Android toolbox. The examples are straight forward, but unfortunately they don’t cover every aspect of the Android universe. Working with the FragmentManager backstack I encountered a problem. Here is how I solved it. Update 2020 At the time of writing this article…