[SideSheet] Modal SideSheet's SideSheetCallback's onSlide() is not called

[manabu-nakamura]

Description: Modal SideSheet's SideSheetCallback's onSlide() is not called (modal BottomSheet's BottomSheetCallback's onSlide() is not called, too). After the modal SideSheet is dragged once, onSlide() will be called.

Expected behavior: onSlide() is called.

Source code: https://github.com/material-components/material-components-android/tree/master/catalog/java/io/material/catalog/sidesheet/SideSheetMainDemoFragment.java#L278-L282
https://github.com/material-components/material-components-android/blob/master/catalog/java/io/material/catalog/sidesheet/SideSheetMainDemoFragment.java#L114-L119

Minimal sample app repro: Catalog app

Android API version: 33

Material Library version: 1.8.0-beta01

Device: Emulator 31.3.14

[afohrman]

Thanks for reporting! This is actually a catalog bug, not a modal side sheet bug. What's happening is that the slide offset text view (and the state text view, if you look carefully) are not updated until the first drag, because up until that point, only the dialog window animations have run, and the values are only initialized in the callback. I have a internal change out to fix this issue in the catalog.