LiaoBo

### Is there an existing issue for this? - [X] I have searched the [existing issues](https://github.com/flutter/flutter/issues) - [X] I have read the [guide to filing a bug](https://flutter.dev/docs/resources/bug-reports) ### Steps to...

[BUG]: BrnNoticeBar跑马灯效果不生效

3

## 问题提交 BrnNoticeBar跑马灯效果不生效 内容需包含： **1、BUG 描述** 开起marquee: true属性，当BrnNoticeBar展示的内容由短文本变化为长文本时，跑马灯动画没有执行。相反，当由长文本变化为短文本后跑马灯动画却会执行，不过动画有点怪怪的，内容显示了2份。 注：使用的ValueListenableBuilder+ValueNotifier动态改变BrnNoticeBar文本内容方式。

The default background is black. I would like to set it to white. How do I set it.

Compatible with lower version issues

1

hi，2 questions： 1、Can lower versions of Android be supported, such as gradle version 4.x, Target API Level 30; 2、how to load the GLTF type.