要在保持焦点在中心元素上的情况下滚动VerticalGridView或RecyclerView，可以使用以下解决方法：

1. 创建一个自定义LayoutManager：

public class CenteredLayoutManager extends LinearLayoutManager {

    public CenteredLayoutManager(Context context) {
        super(context, VERTICAL, false);
    }

    @Override
    public boolean requestChildRectangleOnScreen(RecyclerView parent, View child, Rect rect, boolean immediate, boolean focusedChildVisible) {
        int parentHeight = parent.getHeight();
        int childHeight = child.getHeight();

        int topMargin = (parentHeight - childHeight) / 2;
        int bottomMargin = topMargin;

        rect.top -= topMargin;
        rect.bottom += bottomMargin;

        return super.requestChildRectangleOnScreen(parent, child, rect, immediate, focusedChildVisible);
    }
}

2. 在你的Activity或Fragment中使用CenteredLayoutManager：

RecyclerView recyclerView = findViewById(R.id.recyclerView);
recyclerView.setLayoutManager(new CenteredLayoutManager(this));

3. 为每个item设置焦点监听器：

recyclerView.addOnItemTouchListener(new RecyclerView.OnItemTouchListener() {
    @Override
    public boolean onInterceptTouchEvent(@NonNull RecyclerView rv, @NonNull MotionEvent e) {
        View child = rv.findChildViewUnder(e.getX(), e.getY());
        if (child != null && e.getAction() == MotionEvent.ACTION_DOWN) {
            rv.requestFocusFromTouch();
        }
        return false;
    }

    @Override
    public void onTouchEvent(@NonNull RecyclerView rv, @NonNull MotionEvent e) {
    }

    @Override
    public void onRequestDisallowInterceptTouchEvent(boolean disallowIntercept) {
    }
});

这样，当你滚动RecyclerView时，焦点将始终保持在中心元素上。