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-rw-r--r--telephony/java/android/telephony/PhoneNumberUtils.java4
1 files changed, 4 insertions, 0 deletions
diff --git a/telephony/java/android/telephony/PhoneNumberUtils.java b/telephony/java/android/telephony/PhoneNumberUtils.java
index c79e9bf..9da032a 100644
--- a/telephony/java/android/telephony/PhoneNumberUtils.java
+++ b/telephony/java/android/telephony/PhoneNumberUtils.java
@@ -1492,6 +1492,10 @@ public class PhoneNumberUtils
* @return the normalized number.
*/
public static String normalizeNumber(String phoneNumber) {
+ if (TextUtils.isEmpty(phoneNumber)) {
+ return "";
+ }
+
StringBuilder sb = new StringBuilder();
int len = phoneNumber.length();
for (int i = 0; i < len; i++) {