解决 Usage of API documented as @since 1.8+
报错截图
报错信息
Usage of API documented as @since 1.8+
This inspection finds all usages of methods that have @since tag in their documentation.
This may be useful when development is performed under newer SDK version as the target platform for production.
解决办法：
ctrl + shift + alt + s 快捷键打开
修改 【Modules】下的【Language Level】 为 【8】；如下图:
即可解决此问题；