无法设置背景色

作者您好，我使用了自定义布局来展示选择器，在自定义布局中我使用如下代码设置背景，在studio中预览时有效果的，但是在真机运行的时候没有效果，请问这个问题如何解决呢

No file, test, or entry point is named. Start by reproducing the custom-layout background configuration in the picker on Studio preview and a physical device, then trace the relevant layout setup. Done means the configured background appears consistently on the device as it does in preview.

Written by the indexing model from the issue text.