Try File -> Invalidate Caches/Restart.

Try File -> Invalidate Caches / Restart.

如果这不起作用，您可以尝试删除 ~/.AndroidStudioBeta(或 ~/.AndroidStudioPreview，无论您使用的是哪个).它将清除您的所有设置，因此请为此做好准备，但这解决了我的问题.

If that doesn't work, you can try deleting ~/.AndroidStudioBeta (or ~/.AndroidStudioPreview, whichever you are using). It will clear all your settings so be prepared for that, but this solved the issue in my case.

对于 Mac，清除:
〜/库/应用程序支持/AndroidStudioBeta
~/Library/Caches/AndroidStudioBeta
~/Library/Logs/AndroidStudioBeta
~/Library/Preferences/AndroidStudioBeta

For Mac, clear:
~/Library/Application Support/AndroidStudioBeta
~/Library/Caches/AndroidStudioBeta
~/Library/Logs/AndroidStudioBeta
~/Library/Preferences/AndroidStudioBeta