当在CoordinatorLayout中时，ViewPager不会垂直滚动

public class VerticalScrollBehavior extends CoordinatorLayout.Behavior<ViewPager> {

    @Override
    public boolean onStartNestedScroll(@NonNull CoordinatorLayout coordinatorLayout, @NonNull ViewPager child, @NonNull View directTargetChild, @NonNull View target, int axes, int type) {
        return (axes & ViewCompat.SCROLL_AXIS_VERTICAL) != 0;
    }

    @Override
    public void onNestedPreScroll(@NonNull CoordinatorLayout coordinatorLayout, @NonNull ViewPager child, @NonNull View target, int dx, int dy, @NonNull int[] consumed, int type) {
        super.onNestedPreScroll(coordinatorLayout, child, target, dx, dy, consumed, type);
        
        // 应用垂直滚动的偏移量到ViewPager上
        child.setTranslationY(child.getTranslationY() + dy);
    }
}

<androidx.viewpager.widget.ViewPager
    android:id="@+id/viewPager"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    app:layout_behavior=".VerticalScrollBehavior" />