Reformat local Korean numbers in national format.

Korean carriers don't want the country codes displayed for local calls.
However the network returns the entire phone number including the
country code for Volte calls. According to the Koean phone numbering
scheme (https://en.wikipedia.org/wiki/Telephone_numbers_in_South_Korea),
we need to replace the country code +82 with a 0 prepended to the
carrier code to format it as a national number.

BUG: 22862845
Change-Id: Ifbb9eb8d5379608b4ea9d95ae7744779340b188e

1 files changed, 10 insertions, 1 deletions

diff --git a/telephony/java/android/telephony/PhoneNumberUtils.java b/telephony/java/android/telephony/PhoneNumberUtils.java
index 79146f3..273cc93 100644
--- a/telephony/java/android/telephony/PhoneNumberUtils.java
+++ b/telephony/java/android/telephony/PhoneNumberUtils.java
@@ -1135,6 +1135,8 @@ public class PhoneNumberUtils
         "VI", // U.S. Virgin Islands
     };
 
+    private static final String KOREA_ISO_COUNTRY_CODE = "KR";
+
     /**
      * Breaks the given number down and formats it according to the rules
      * for the country the number is from.
@@ -1455,7 +1457,14 @@ public class PhoneNumberUtils
         String result = null;
         try {
             PhoneNumber pn = util.parseAndKeepRawInput(phoneNumber, defaultCountryIso);
-            result = util.formatInOriginalFormat(pn, defaultCountryIso);
+            if (KOREA_ISO_COUNTRY_CODE.equals(defaultCountryIso) &&
+                    (pn.getCountryCode() == util.getCountryCodeForRegion(KOREA_ISO_COUNTRY_CODE))) {
+                // Format local Korean phone numbers with country code to corresponding national
+                // format which would replace the leading +82 with 0.
+                result = util.format(pn, PhoneNumberUtil.PhoneNumberFormat.NATIONAL);
+            } else {
+                result = util.formatInOriginalFormat(pn, defaultCountryIso);
+            }
         } catch (NumberParseException e) {
         }
         return result;