Public Object

Here’s a program that launches 3 jobs. The first runs forever and the other two exchange a value.
Once the useful jobs B and C finish, it cancels job A. The program completes in about 50 milliseconds on my laptop.
Programs like this are why I adore Kotlin’s coroutines API. I can orchestrate a lot of behaviour with a small amount of code....

In 2012, I published an Android score pad app named Rounds to the Play Store. I was quite proud of it! It used an iPod click wheel-style score entry UI and balanced capability with simplicity.
I joined Square, did a bunch of open source, had a bunch of kids, and got generally busy. Rounds wasn’t broken and I neglected it. But eventually Google kicked it out of the Play Store for lack of updates. I never felt like I had the time to bring it...

I recently posted on the Cash Code Blog announcing Burst’s new test interceptors feature. They are similar to JUnit rules in API and capability.
A Small API
A typical use case is connecting some lifecycle to a test’s execution. Perhaps we want a chess engine to be available while a test is running:...

I presented this at Droidcon NYC on June 25, 2025.
Available as code, video, slides, Droidtube, & Speaker Deck.
Coroutines are an important tool in the Android developer’s toolbox. We use 'em to background our tasks, to parallelize our work, and to gracefully cancel operations....