ComposeNestedScrollSampleEncapsulatedConnection.kt

private class CollapsingAppBarNestedScrollConnection(
    val appBarMaxHeight: Int
) : NestedScrollConnection {

   var appBarOffset: Int by mutableIntStateOf(0)
       private set

   override fun onPreScroll(available: Offset, source: NestedScrollSource): Offset {
       val delta = available.y.toInt()
       val newOffset = appBarOffset + delta
       val previousOffset = appBarOffset
       appBarOffset = newOffset.coerceIn(-appBarMaxHeight, 0)
       val consumed = appBarOffset - previousOffset
       return Offset(0f, consumed.toFloat())
   }
}

When the scroll y is less than 1, it will be ignored.

Is this modification more reasonable?

val delta = available.y.let {
    if (it < 0) floor(it) else ceil(it)
}.toInt()