在NestedScrollView中拦截向下抛出的RecyclerView

public class CustomNestedScrollView extends NestedScrollView {

    private float startY;
    private RecyclerView recyclerView;

    public CustomNestedScrollView(Context context) {
        super(context);
    }

    public CustomNestedScrollView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public CustomNestedScrollView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }

    @Override
    public boolean onInterceptTouchEvent(MotionEvent ev) {
        switch (ev.getAction()) {
            case MotionEvent.ACTION_DOWN:
                startY = ev.getY();
                recyclerView = findRecyclerView(this);
                break;
            case MotionEvent.ACTION_MOVE:
                float currentY = ev.getY();
                if (currentY > startY && recyclerView != null && !recyclerView.canScrollVertically(-1)) {
                    // 向下滑动，RecyclerView 已经滑动到顶部，拦截事件
                    return true;
                }
                break;
        }
        return super.onInterceptTouchEvent(ev);
    }

    private RecyclerView findRecyclerView(ViewGroup viewGroup) {
        int childCount = viewGroup.getChildCount();
        for (int i = 0; i < childCount; i++) {
            View child = viewGroup.getChildAt(i);
            if (child instanceof RecyclerView) {
                return (RecyclerView) child;
            } else if (child instanceof ViewGroup) {
                RecyclerView recyclerView = findRecyclerView((ViewGroup) child);
                if (recyclerView != null) {
                    return recyclerView;
                }
            }
        }
        return null;
    }
}

<com.example.CustomNestedScrollView
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <!-- 这里放置其他内容 -->

    <androidx.recyclerview.widget.RecyclerView
        android:layout_width="match_parent"
        android:layout_height="wrap_content" />

</com.example.CustomNestedScrollView>