Android Cannot resolve symbol '?attr/selectableItemBackground'

Answer 1

I faced with same error after updating Kotlin. Solved with "Invalidate caches/Restart"

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UPDATE Today this solution did not helped me. But the solution of this question did: Android Studio 3.1 Cannot Resolve Symbol (Themes, Widget, attr, etc.)

Answer 2

Both resources are defined with the Android Support Library and since these symbols cannot be resolved, it seems like you're missing to define the support dependency.

dependencies {
    compile "com.android.support:appcompat-v7:$androidSupportVersion"
}

Answer 3

I updated my gradle version to 4.10.1 and fix and reimport repaired it. There were no libraries folder under .idea before.

Answer 4

If you use applicationContext for LayoutInflater, then replace it to normal context. It works for me.