AndroidStudio3.1：编辑器中错误的未解析引用-AndroidStudio3.1:Erroneousunresolvedreferencesineditor

I'm running Ubuntu 17.10, and I've just updated Android Studio from version 3.0.1 to 3.1. Here's the version information in Help -> About:

我正在运行Ubuntu 17.10,我刚刚将Android Studio从版本3.0.1更新到3.1。这是帮助中的版本信息 - >关于:

Android Studio 3.1
Build #AI-173.4670197, built on March 22, 2018
JRE: 1.8.0_152-release-1024-b01 amd64
JVM: OpenJDK 64-Bit Server VM by JetBrains s.r.o
Linux 4.13.0-37-generic

Unfortunately, while the IDE was able to resolve android-specific references before in my (first ever) Kotlin project, in the new version it appears unable to. Here's a screenshot showing what I mean:

不幸的是,虽然IDE在我的(第一次)Kotlin项目之前能够解析特定于android的引用,但在新版本中它似乎无法解决。这是截图显示我的意思:

In Android Studio 3.1, it's claiming that core Android functions such as setContentView() don't exist, and keeps prompting me to create an abstract function for it - which I clearly don't want to do. However, if I hit the build button, I get a BUILD SUCCESSFUL in 8s.

在Android Studio 3.1中,它声称核心Android函数(如setContentView())不存在,并且不断提示我为它创建一个抽象函数 - 我显然不想这样做。但是,如果我按下构建按钮,我会在8s内获得一次成功。

Does anyone know why my editor is doing this, and how I get get Android-related functions and classes to resolve correctly again?

有谁知道我的编辑器为什么这样做,以及如何让Android相关的函数和类再次正确解析?

Edit: Update: I've got more information on the issue now, but it's still not resolved:

编辑:更新:我现在有关于这个问题的更多信息,但它仍然没有解决:

• Build -> Clean and then Build -> Rebuild doesn't help.

构建 - >清理然后构建 - >重建没有帮助。

• File -> Invalidate Caches and Restart doesn't help either

文件 - >无效缓存和重新启动也没有帮助

• Neither does a manual Gradle sync.

也没有手动Gradle同步。

• A different project that's written in Java instead of Kotlin works fine.

用Java编写的另一个项目代替Kotlin工作得很好。

• Link to the project I'm experiencing issues with (it's open-source)

链接到项目我遇到的问题(它的开源)

2 个解决方案