毕设day28
bug:
Version 28 (intended for Android Pie and below) is the last version of the legacy support library,...
解决:
https://blog.csdn.net/qq_32534441/article/details/104804429
bug:
Cannot resolve symbol 'Toolbar'
解决:对于toolbar导入的包是Android.widget.Toolbar,但其实需要使用的不是这个包,将包名改为android.suppport.V7.widget.Toolbar,就正确了
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