Disable shift mode for BottomNavigationView

bnv-disable-shift.kt

@SuppressLint("RestrictedApi")
fun BottomNavigationView.disableShiftMode() {
    val menuView = this.getChildAt(0) as BottomNavigationMenuView
    
    try {
        val shiftingMode = menuView.javaClass.getDeclaredField("mShiftingMode")
        shiftingMode.isAccessible = true
        shiftingMode.setBoolean(menuView, false)
        shiftingMode.isAccessible = false

        for (i in 0 until menuView.childCount) {
            val item = menuView.getChildAt(i) as BottomNavigationItemView
            item.setShiftingMode(false)
            item.setChecked(item.itemData.isChecked)
        }
    } catch (e: NoSuchFieldException) {
        e.printStackTrace()
    }
}

From API28 this works