I am experiencing a problem while trying to see the preview of layout xml files in Android Studio. There is a string with the content: android...CoordinatorLayout
or android...ActionBarOverlayLayout
in the middle of the preview screen.
I tried a few things I found while searching for a solution:
1) Cleaning the project 2) Invalidating Cache/ Restart 3) Changing the API level of the editor window.
I am not sure if this behaviour first appeared after switching to Android Studio 3.