Truncate operator name to fit into SystemProp size

Test: manual
Bug: 210502588
Change-Id: I59a87fa256a9be54755199034e138a63d89f0885

1 files changed, 19 insertions, 1 deletions

diff --git a/telephony/java/android/telephony/TelephonyManager.java b/telephony/java/android/telephony/TelephonyManager.java
index a5adf52051b9..b4825153bf0a 100644
--- a/telephony/java/android/telephony/TelephonyManager.java
+++ b/telephony/java/android/telephony/TelephonyManager.java
@@ -11487,7 +11487,25 @@ public class TelephonyManager {
         if (SubscriptionManager.isValidPhoneId(phoneId)) {
             List<String> newList = updateTelephonyProperty(
                     TelephonyProperties.operator_alpha(), phoneId, name);
-            TelephonyProperties.operator_alpha(newList);
+            try {
+                TelephonyProperties.operator_alpha(newList);
+            } catch (IllegalArgumentException e) { //property value is longer than the byte limit
+                Log.e(TAG, "setNetworkOperatorNameForPhone: ", e);
+
+                int numberOfEntries = newList.size();
+                int maxOperatorLength = //save 1 byte for joiner " , "
+                        (SystemProperties.PROP_VALUE_MAX - numberOfEntries) / numberOfEntries;
+
+                //examine and truncate every operator and retry
+                for (int i = 0; i < newList.size(); i++) {
+                    if (newList.get(i) != null) {
+                        newList.set(i, TextUtils
+                                .truncateStringForUtf8Storage(newList.get(i), maxOperatorLength));
+                    }
+                }
+                TelephonyProperties.operator_alpha(newList);
+                Log.e(TAG, "successfully truncated operator_alpha: " + newList);
+            }
         }
     }