IssueTracker

Android Studio 3.4 Canary 10
Build #AI-183.4588.61.34.5202479, built on December 27, 2018
JRE: 1.8.0_152-release-1248-b01 amd64
JVM: OpenJDK 64-Bit Server VM by JetBrains s.r.o
Linux 4.18.10-1rodete2-amd64
Android Gradle Plugin: 3.4.0-alpha10

When using Locale.getDefault() within a method declared on an enum value, the use is flagged by Lint [ConstantLocale] as being assigned to a static final constant. This is reproducible in both Java and Kotlin code. The simplest reproduction case is just:

public enum JavaEnum {
    VALUE {
        public Locale getDefaultLocale() {
            return Locale.getDefault();
        }
    }
}

or

enum class KotlinEnum {
    VALUE {
        fun getDefaultLocale() = Locale.getDefault()
    }
}

Since these methods are evaluated when called, the correct value will be resolved at the time, so I believe this is a false positive.