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

In my case closing and reopening Android studio solved the problem. Rebuilding the project or clearing the cache didn't help.

Answer 2

If you devise your layout : layout-sw320dp layout-sw480dp layout-sw600dp layout-sw720dp ....

you should add layout by default like this:

Answer 3

What worked for me is to remove the id attribute

android:id="@+id/[id same as filename]"

from the layout resource.

Answer 4

I solved this issue by just syncing project with gradle

Answer 5

I had an issue after copy/pasting code into an XML layout file, but I fixed it by just manually creating the file. Very strange, since the code was exactly the same, but somehow it fixed this issue. I did try restarting and doing the "File => Invalidate Caches / Restart => Invalidate and Restart" fix, but the issue was only fixed by manually recreating the file.

Answer 6

In my case it seems that Google used to expect (or at least accept) different names between different layouts; I had a time_dialog.xml and a time_dialog_landscape.xml. Renaming the latter to time_dialog.xml fixed the problem.