Stage 1 · Lesson 8 of 9
Coroutine basics
let you write async code that reads top to bottom, like normal code. A suspend function can pause without blocking its thread, for example while it waits for the network. You start coroutines from a scope.
Use launch for work with no result, or async when you need a result later with await. Structured concurrency means every coroutine belongs to a scope. When the scope is cancelled, its children are cancelled too.
For example, viewModelScope is cancelled when the screen goes away. decide which threads run the work: withContext(Dispatchers.IO) moves blocking work, such as reading a file, off the .
Common trapGlobalScope or runBlocking in app code: the first leaks work, the second freezes the .
A question to check yourself, an AI practice session and 2 cheat sheet entries come with the full roadmap. Unlock
Resources for this stage
Start with· follow one of these
- GuideFreeKotlin Documentation
JetBrains
Start with the Kotlin tour, then the null safety and coroutines basics pages
- CourseFreeAndroid Basics with Compose
Google · Beginner
The Kotlin pathways in Units 1 to 3 teach the language with practice sets