如何从Java程序中调整Android网格布局间距

public class CustomGridLayoutManager extends GridLayoutManager {
    private int spacing; // 间距大小

    public CustomGridLayoutManager(Context context, int spanCount, int spacing) {
        super(context, spanCount);
        this.spacing = spacing;
    }

    @Override
    public void getItemOffsets(Rect outRect, View view, RecyclerView parent, RecyclerView.State state) {
        super.getItemOffsets(outRect, view, parent, state);
        outRect.set(spacing, spacing, spacing, spacing); // 设置间距
    }
}

RecyclerView recyclerView = findViewById(R.id.recyclerView);
int spanCount = 2; // 网格列数
int spacing = 10; // 间距大小，单位为像素
CustomGridLayoutManager layoutManager = new CustomGridLayoutManager(this, spanCount, spacing);
recyclerView.setLayoutManager(layoutManager);