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Cannot resolve symbol 'R' (错误:程序包R不存在)


具体遇到情况如下,提示Cannot resolve symbol ‘R’ (错误:程序包R不存在):

Cannot resolve symbol


Cannot resolve symbol

**解决方法:

把光标放在R附近,按住Alt+enter弹出提示窗口 选择import class,然后再build**

Cannot resolve symbol


Cannot resolve symbol


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