Hello :slightly_smiling_face: Since I changed to v...

# compose

[Tuba Kesten]

Hello 🙂 Since I changed to version "beta03" I get the following error message when I try to backpress in a suspend function. How can I fix this error?

java.lang.IllegalStateException: A MonotonicFrameClock is not available in this CoroutineContext. Callers should supply an appropriate MonotonicFrameClock using withContext.

lifecycleScope.launch { bottomBarManager?.onBackPressed() }
super.onBackPressed()

[itnoles]

launch { withContext(MonotonicFrameClock) {} }

[julioromano]

https://kotlinlang.slack.com/archives/CJLTWPH7S/p1616684781159600

[Tuba Kesten]

@itnoles tried what you said.

lifecycleScope.launch { withContext(MonotonicFrameClock) { bottomBarManager?.onBackPressed() }}

Type mismatch.
Required:
CoroutineContext
Found:
MonotonicFrameClock.Key

[Tuba Kesten]

@julioromano this is not working for me. I use lifecyclescope instead of Coroutine scope as it is activity.

[julioromano]

Sounds weird, generally lifecycleScope shouldn’t be used within composables.

[Tuba Kesten]

We are not using in composable, we are using it in an activity

[julioromano]

Too much context is missing, what are you trying to accomplish?

[Adam Powell]

Can you post the code from bottomBarManager.onBackPressed()?

[Adam Powell]

I'm guessing it performs animation internally, right?

[dewildte]

I had this error when trying to close a drawer from a ViewModel.

[dewildte]

The solution was to use a LaunchedEffect from compose.

[dewildte]

Or some other coroutine launch from the compose scope.

[dewildte]

Launching the coroutine from anywhere outside of compose results is this kind of error.

[Adam Powell]

Yep. You always want to have your animations synchronized with the composition they're happening in. This is the mechanism for doing that.