BottomSheetBehaviour setstate without animation

Question

I have tried the new BottomSheetBehaviour with design library 23.0.2 but i think it too limited. When I change state with setState() method, the bottomsheet use ad animation to move to the new state.

How can I change state immediately, without animation? I don't see a public method to do that.

Answer 1

Unfortunately it looks like you can't. Invocation of BottomSheetBehavior's setState ends with synchronous or asynchronous call of startSettlingAnimation(child, state). And there is no way to override these methods behavior cause setState is final and startSettlingAnimation has package visible modifier. Check the sources for more information.

I have problems with the same, but in a bit different way - my UI state changes setHideable to false before that settling animation invokes, so I'm getting IllegalStateException there. I will consider usage of BottomSheetCallback to manage this properly.

Answer 2

If you want to remove the show/close animation you can use dialog.window?.setWindowAnimations(-1). For instance:

class MyDialog(): BottomSheetDialogFragment() {

    override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {
        val dialog = super.onCreateDialog(savedInstanceState)

        dialog.window?.setDimAmount(0f) // for removing the dimm
        dialog.window?.setWindowAnimations(-1) // for removing the animation

        return dialog
    }
}