Defines all major device class constants.

定义所有的设备类常量。

youdao

Class constants are always public, so you can't use the visibility keywords.

类常量始终为public，所以不能使用可见度关键字。

youdao

Class constants are always public, so you can't use the visibility keywords.

类常量始终为public，所以不能使用可见度关键字。

youdao