Java 如何将单击/长单击侦听器添加到ViewPager2

我从

ViewPager

移动到

ViewPager2

。由于无法将可单击回调设置为

ViewPager2

，也无法将其扩展为可单击回调，因此我执行了以下操作：

public class ViewPagerFragment extends Fragment {
    ViewPager2 viewPagerTop;
    ViewPager2Adapter viewPager2TopAdapter;
    ClickableListener topClickableListener;

    public interface ClickableListener {
        public void on(int position);
        public boolean onLong(int position);
    }

    public void setOnClickTop(ClickableListener clickableListener) {
        topClickableListener = clickableListener;
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment_view_pager, container, false);
        viewPagerTop = view.findViewById(R.id.viewPagerTop);

        viewPagerTop.setOnLongClickListener(v -> {
            Log.d("AAA", "long clicked!");
            int position = viewPagerTop.getCurrentItem();
            return topClickableListener.onLong(position);
        });
        viewPagerTop.setOnClickListener(v -> {
            Log.d("AAA", "clicked!");
            int position = viewPagerTop.getCurrentItem();
            topClickableListener.on(position);
        });

---

但这行不通。我在日志上什么也没看到。

检查一下。这应该行得通。看看这个。这应该行得通。