Hey Android devs. The thread annotations like `@UiThread` and `@WorkerThread` didn't always act like I expected so I decided to investigate and ended up writing a blog post [1] about when they work and when they don't.
*tldr; they don't follow the call stack* – an annotated method will only display a warning if the methods inside of it are annotated. Additionally, `Runnable` instances (and similar APIs) can not infer which thread they were posted to and need to be explicitly marked. If you're curious, more details are in the post, or you can just see some examples on Github [2]. - Mike (:mcomella) [1]: http://mcomella.xyz/blog/2016/thread-annotations.html [2]: https://github.com/mcomella/ThreadAnnotationsTest/tree/master/app/src/main/java/xyz/mcomella/threadannotationstest
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