Error in activity_new_character.xml

Kotlin Programming: The Big Nerd Ranch Guide 21. Building Your First Android App with Kotlin
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android:padding=“16dp” tools:context=".NewCharacterActivity" />
NewCharacterActivity is showing red in Android Studio saying Unresolved Class. I have a NewCharacterActivity.kt class. I am not able to build and run the project.

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When I cut-n-pasted the xml file from your site, I overlaid the XML header. When i inserted an XML header, the NewCharacterActivity is still read, but the project builds and runs on the simulator.

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It makes sense that the project would be able to build even though the NewCharacterActivity reference is red because it’s being used in a tools attribute. Why, though, is it red?

Is NewCharacterActivity defined in your root package, or have you created some subpackage for it?