Why is Android Studio reporting URI is not registered?
You are having this issue because you are at the wrong destination! The correct directory for the Layout resource file has to be under "res-layout" not "res-all-layout"
URI is not registered error Android Studio
It turns out I was editing the DEBUG version of the strings.xml, to fix it, simply close the tab that has the error and re-open it.
XML file lines In android studio are giving an error It says URI not registered
The 'X' should not be capital. Replace 'X' with 'x'.
Unless you made the typo here and not in your code...