Kotlin Standard Library Cookbook

How it works...

The coroutine started in the MainActivity.onCreate() function is running an infinite while loop. Each iteration starts with a one-minute delay and incrementation of the counter variable. Next, we are applying the withContext() function in order to update TextView with the new value.

The withContext() function allows us to switch to a new coroutine dispatcher, obtained from the context argument, in order to execute a block of code passed to it. It doesn't create and start a new coroutine, but it modifies the context of the parent coroutine immediately. The new dispatcher is applied only temporarily to execute a given block of code. Any further operations executed inside the coroutine scope after the withContext() function call ...