在Android Studio中更新到Gradle 3.3.2时出错:无法解析符号R [英] Error when updating to Gradle 3.3.2 in Android Studio: Cannot resolve symbol R

问题描述

如果我通过更改来更新Gradle

If I update Gradle by changing

dependencies {
    classpath 'com.android.tools.build:gradle:3.x.x'
}

从版本 3.2.1 到版本 3.3.2 ，我在所有活动中均收到Cannot resolve symbol R错误，但但错误.不知道是什么原因造成的.我在项目文件的Android视图上意识到，在app/generatedJava/下有许多版本为 3.2.1 的软件包，但是更新时，除了my.app.package.

from version 3.2.1 to version 3.3.2 I get the Cannot resolve symbol R error on all activities but the project actually builds without errors. Don't know what might be causing this. I realized on the Android view of the project files, under app/generatedJava/ there are many packages with version 3.2.1, but when updated none of them are there, except for a BuildConfig.java class under my.app.package.

我已经尝试了所有 Build-> Clean ， Build-> Rebuild ， File-> Invalidate caches ， File->与Gradle文件同步项目等方法可以解决问题，但仍然找不到R类.

I've already tried all the Build -> Clean, Build -> Rebuild, File -> Invalidate caches, File -> Sync Project with Gradle Files, etc. methods which would solve the problem and still not finding the R class.

对于版本 3.2.1 ，这不会发生.

With version 3.2.1 this doesn't happen though.

推荐答案

正如Vivek在评论中所述，解决方案也是升级Android Studio.我升级到版本 3.3 ，它终于解决了问题对我来说.

As Vivek stated in the comments, the solution is to upgrade Android Studio as well. I upgraded to version 3.3 and it finally solved the problem for me.

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