Version 28 (intended for Android Pie and below) is the last version of the legacy support library.....Refactor > Migrate to AndroidX

Version 28 (intended for Android Pie and below) is the last version of the legacy support library, so we recommend that you migrate to AndroidX libraries when using Android Q and moving forward. The IDE can help with this: Refactor > Migrate to AndroidX 

 

 

今天整理代码的时候，发现我的app gradle 出现了上面那句话

简单的来讲是google不支持support库了，建议转换到androidX库

操作也很简单

 

 

选择 Migrate to AndroidX

 

然后选择文件

 

 就可以了