why does `animateColorAsState` break my `@Preview` in Flamingo?

# compose

[czuckie]

why does animateColorAsState break my @Preview in Flamingo?

[czuckie]

Also doesn't work in Dolphin or Eel

[czuckie]

Could not get applicationId for my.module.main. Project type: PROJECT_TYPE_LIBRARY

[czuckie]

that was reported... if I add applicationId into the default config of my library... the preview starts working again

[Jhonatan Sabadi]

You need to set applicationId only n module:app, the others library module, does not set applicationId. Its not about IDE version

[czuckie]

if I don't add this, the preview will not render.

Are previews only supported in application modules?

[Jhonatan Sabadi]

your project must have at least one applicationId, thats correct. @Preview are supported in any module (app or library), check your definitions

[czuckie]

so just to be really clear:

Using animateColorAsState in a @Preview in an android library module resulted in no previews rendering. Changing the use of animateColorAsState to a static colour resulted in all the previews rendering correctly.

Upon replacing the static colour with animateColorAsState again, Android Studio notified me of the following exception:

Could not get applicationId for my.module.main. Project type: PROJECT_TYPE_LIBRARY

As a way of checking whether it was possible to placate the error, I placed applicationId 'my.module' in my build.gradle for my android library module, which resulted in the preview rendering successfully, with the AGP giving a warning that applicationId should not be in a library module.

Things I know:
applicationId shouldn't be in the build.gradle for a library module

Things I don't know:
Why the preview using animateColorAsState won't render unless I place applicationId in my build.gradle

[eygraber]

Probably a bug. Have you checked issuetracker to see if a report already exists? If one doesn't, please consider filing one.