RecyclerView间距过大

您可以通过设置RecyclerView的ItemDecoration来调整RecyclerView的间距。您可以创建一个类来实现ItemDecoration，然后在RecyclerView中设置它。以下是一个示例代码：

public class MyItemDecoration extends RecyclerView.ItemDecoration {
    private int mSpacing;

    public MyItemDecoration(int spacing) {
        mSpacing = spacing;
    }

    @Override
    public void getItemOffsets(Rect outRect, View view, RecyclerView parent, RecyclerView.State state) {
        outRect.left = mSpacing;
        outRect.right = mSpacing;
        outRect.bottom = mSpacing;

        // Add top margin only for the first item to avoid double space between items
        if (parent.getChildAdapterPosition(view) == 0) {
            outRect.top = mSpacing;
        } else {
            outRect.top = 0;
        }
    }
}

然后在RecyclerView中设置它：

int spacingInPixels = getResources().getDimensionPixelSize(R.dimen.spacing);
recyclerView.addItemDecoration(new MyItemDecoration(spacingInPixels));

这将在RecyclerView的每个项目周围添加指定的间距。