diff --git a/android/util.go b/android/util.go
index 71ded5e..ddbe1cd 100644
--- a/android/util.go
+++ b/android/util.go
@@ -352,3 +352,14 @@
 	}
 	return ret
 }
+
+func CheckDuplicate(values []string) (duplicate string, found bool) {
+	seen := make(map[string]string)
+	for _, v := range values {
+		if duplicate, found = seen[v]; found {
+			return
+		}
+		seen[v] = v
+	}
+	return
+}