I am currently attempting to refresh data from a server at a regular interval, only when the UI is d...

# compose

[David Edwards]

I am currently attempting to refresh data from a server at a regular interval, only when the UI is displayed. So when back or home is pressed, the checks will stop. When I return, it will continue again.

I thought I could use a LaunchedEffect, as it runs in a CoroutineScope. I thought that this would result in the Coroutine automatically cancelling when going home. However, I am not sure how it is linked to the lifecycle. It remains active in the background.

LaunchedEffect(true) {
    while (isActive) {
        delay(60000L)
        vm.getData()
    }
}

Is there a better pattern to use in this case?

[Adam Powell]

This will remain active in the background, yes. There are a few new APIs in flight for androidx:lifecycle:lifecycle-ktx that will look more like:

LaunchedEffect(true) {
  repeatOnLifecycle(Lifecycle.State.STARTED) {
    while (true) {
      delay(...)
      vm.getData()
    }
  }
}

[David Edwards]

Ahhh, that will be great. I look forward to it. 👍

[Adam Powell]

yes https://developer.android.com/reference/kotlin/androidx/lifecycle/package-summary#repeatonlifecycle

[David Edwards]

For other interested parties, it was added in 2.4.0-alpha01 . I didn't notice a new alpha version.