如何从ViewPager共享TextView的内容？

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <androidx.viewpager.widget.ViewPager
        android:id="@+id/viewPager"
        android:layout_width="match_parent"
        android:layout_height="0dp"
        android:layout_weight="1" />

    <TextView
        android:id="@+id/textView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

</LinearLayout>

public class MyPagerAdapter extends PagerAdapter {
    private List<String> textList;

    public MyPagerAdapter(List<String> textList) {
        this.textList = textList;
    }

    @Override
    public int getCount() {
        return textList.size();
    }

    @Override
    public boolean isViewFromObject(@NonNull View view, @NonNull Object object) {
        return view == object;
    }

    @NonNull
    @Override
    public Object instantiateItem(@NonNull ViewGroup container, int position) {
        LayoutInflater inflater = LayoutInflater.from(container.getContext());
        View view = inflater.inflate(R.layout.page_item, container, false);

        TextView textView = view.findViewById(R.id.textView);
        textView.setText(textList.get(position));

        container.addView(view);
        return view;
    }

    @Override
    public void destroyItem(@NonNull ViewGroup container, int position, @NonNull Object object) {
        container.removeView((View) object);
    }
}

ViewPager viewPager = findViewById(R.id.viewPager);
TextView textView = findViewById(R.id.textView);

List<String> textList = new ArrayList<>();
textList.add("Page 1");
textList.add("Page 2");
textList.add("Page 3");

MyPagerAdapter pagerAdapter = new MyPagerAdapter(textList);
viewPager.setAdapter(pagerAdapter);

viewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() {
    @Override
    public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
    }

    @Override
    public void onPageSelected(int position) {
        textView.setText(textList.get(position));
    }

    @Override
    public void onPageScrollStateChanged(int state) {
    }
});