我有一个DialogFragment，我需要从一个Fragment中显示它。这是我的DialogFragment：

class MyDialogFragment : DialogFragment() {
    companion object {
        @JvmStatic
        internal fun newInstance(): MyDialogFragment = MyDialogFragment()
    }

    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? =
        inflater.inflate(R.layout.my_dialog_fragment container, false)

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)
        view.findViewById<MaterialButton>(R.id.cancel_button)?.setOnClickListener { dismiss() }
    }

    override fun onCreateDialog(savedInstanceState: Bundle?): Dialog {
        val builder = AlertDialog.Builder(requireActivity())
        val dialogView = requireActivity().layoutInflater.inflate(R.layout.my_dialog_fragment, null)
        builder.setView(dialogView)

        dialogView.findViewById<Button>(R.id.cancel_button).setOnClickListener { dismiss() }

        return builder.create()
    }

    fun setMyAction(action: () -> Unit) {
        view?.findViewById<MaterialButton>(R.id.proceed_button)?.setOnClickListener { action() }
    }
}

我从片段中调用它的方式如下：

btnSubmit.setOnClickListener(view -> {
            MyDialogFragment myDialogFragment = new MyDialogFragment();
            myDialogFragment.show(getChildFragmentManager(), MyDialogFragment.class.getSimpleName());
            myDialogFragment.setMyAction(this::action);
        });

这里的问题是，不可能从调用片段调用setMyAction并调用action()，因为在对话框中，view是null，就像我试图用dialog()获取它一样。这里的第二个问题是：为什么onCreateView永远不会被调用，就像onViewCreated一样？
先谢谢你了！