Why does Android Studio highlight “Theme” red in styles.xml?

Question

Red highlight means Cannot resolve symbol \'Theme\'

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Answer 1

Only this worked for me!

• Close project (File> Close Project)
• Import / Re-Open project again (NOT from Recent)

Error should be resolved now.

If that did not resolve, then try below

• Open build.gradle, remove appcompact-v7 dependency line and sync.
• Again add appcompact-v7 dependency and sync.

Issue must be resolved!