Making any codebase more readable with Kotlin coroutines
summary
Kotlin coroutines turn blocking I/O and callback-heavy code into straightforward suspending functions using kotlinx.coroutines with lifecycle scopes, dispatchers (Main, Default, IO) and structured concurrency. Examples show an 800+ line camera sample and a 1,000+ line Java version collapse to far fewer lines, and recording video in under five lines. Libraries bridge messy APIs (Bluetooth, Retrofit) via suspend wrappers; cancellation, timeouts and backpressure with flows/channels are demonstrated and shown to work in real Android use.
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chapters (24)
- 0:00Intro
- 1:34A readability (bad) example
- 4:02Thread offloading was inconvenient
- 4:31I had to use Bluetooth Low Energy
- 5:09I had to use Camera 2 API for video
- 6:22My code is often waiting
- 7:11Functions signatures
- 10:30Non blocking functions: keywords
- 12:34Writing your own composition
- 13:25Writing your own: parallel composition
- 14:36Writing your own: wrapping blocking code
- 15:29Dispatchers
- 16:27Cancellation != crash
- 16:43Cancelling a coroutine
- 16:59Cancel after timeout
- 17:43Writing your own wrapping simple callbacks
- 18:44Writing your own: wrapping callbacks
- 19:57Callback hell APIs: safe weapons
- 22:51Structured concurrency
- 23:53What about streams?
- 24:55Built into the language
- 26:21Continuation
- 28:29Roman Elizarov
- 29:22Growing libraries ecosystem
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