无法在viewpager kotlin中查看文本

<!-- activity_main.xml -->
<androidx.viewpager.widget.ViewPager
    android:id="@+id/viewPager"
    android:layout_width="match_parent"
    android:layout_height="match_parent"/>

<!-- fragment_example.xml -->
<TextView
    android:id="@+id/textView"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Hello World!"
    android:visibility="visible"/>

class MyPagerAdapter(fm: FragmentManager) : FragmentPagerAdapter(fm) {
    override fun getItem(position: Int): Fragment {
        return ExampleFragment.newInstance("Page $position")
    }

    override fun getCount(): Int {
        return 3 // 假设有三个页面
    }
}

class ExampleFragment : Fragment() {
    companion object {
        fun newInstance(text: String): ExampleFragment {
            val fragment = ExampleFragment()
            val args = Bundle().apply {
                putString("text", text)
            }
            fragment.arguments = args
            return fragment
        }
    }

    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
        val view = inflater.inflate(R.layout.fragment_example, container, false)
        val textView = view.findViewById<TextView>(R.id.textView)
        textView.text = arguments?.getString("text")
        return view
    }
}

override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
    super.onViewCreated(view, savedInstanceState)
    // 更新TextView的代码
}