RT,在我编译了一次项目之后，项目中就出现R文件找不到的错误，请问这是怎么回事？求指导！！
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Cleaning can usually solve the problem
Resource files, there must be tips below
Or directly ctrl+f9
Sync project with Gradle file
There is an error in the resource file and the R file cannot be automatically generated. This should be the case.
There is an error in the resource file, that is, there is a problem with string.xml or manifest.xml. You can go to the problem below to see the problem. That should be the problem there.
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Cleaning can usually solve the problem
Resource files, there must be tips below
Or directly ctrl+f9
Sync project with Gradle file
There is an error in the resource file and the R file cannot be automatically generated. This should be the case.
There is an error in the resource file, that is, there is a problem with string.xml or manifest.xml. You can go to the problem below to see the problem. That should be the problem there.