Set state of BottomSheetDialogFragment to expanded

Question

How do you set the state of a fragment extending BottomSheetDialogFragment to expanded using BottomSheetBehavior#setState(STATE_EXPANDED) using the

Answer 1

In your Kotlin BottomSheetDialogFragment class, override onCreateDialog as below

override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {
        val bottomSheetDialog = super.onCreateDialog(savedInstanceState) as BottomSheetDialog
        bottomSheetDialog.setOnShowListener {
            val bottomSheet =
                bottomSheetDialog.findViewById(
                    com.google.android.material.R.id.design_bottom_sheet
                )
            val behavior = BottomSheetBehavior.from(bottomSheet!!)
            behavior.skipCollapsed = true
            behavior.state = BottomSheetBehavior.STATE_EXPANDED
        }
        return bottomSheetDialog
    }