ViewPager2，获取当前页面viewholder

<androidx.viewpager2.widget.ViewPager2
    android:id="@+id/viewPager2"
    android:layout_width="match_parent"
    android:layout_height="match_parent" />

ViewPager2 viewPager2 = findViewById(R.id.viewPager2);
viewPager2.setAdapter(adapter);

int currentItem = viewPager2.getCurrentItem();
RecyclerView.ViewHolder viewHolder = viewPager2.findViewHolderForAdapterPosition(currentItem);

viewPager2.registerOnPageChangeCallback(new ViewPager2.OnPageChangeCallback() {
    @Override
    public void onPageSelected(int position) {
        RecyclerView.ViewHolder viewHolder = viewPager2.findViewHolderForAdapterPosition(position);
        // 这里可以对ViewHolder进行操作
    }
});