The layout in layout has no declaration in the base layout folder [error]

Question

After migrating to Android Studio 3.2, API 28, I am getting the following error on my app\'s layout:

The layout in layout has no declaration in the base lay

Answer 1

For me the following steps made it work:

1. Cut all the code out of the page (ctrl+A+X for windows)
2. Paste the code back.

Answer 2

In my case it was the use of capital letters in the file name. I left everything in lowercase and it was fixed.

Answer 3

In my case, this issue was caused by Uppercase letter. Wrong chars like "-" can also cause the issue. I changed the name from Activity_disease.xml to activity_disease.xml and the issue fixed.

Answer 4

You can also try this :

File => Invalidate Caches / Restart => Invalidate and Restart.

Answer 5

Late to the party but My case is different from above.

I just renamed the resource and it started working.

Actually my resource name was ic_menu_black_24dp.xml so it was conflicting with the android's menu resource.

Answer 6

(1) Delete the original layout.

(2) Add the layout again.

Step-1

Step-2