2 files changed, 19 insertions, 7 deletions
diff --git a/icu4j/main/classes/core/src/com/ibm/icu/text/DateIntervalFormat.java b/icu4j/main/classes/core/src/com/ibm/icu/text/DateIntervalFormat.java
index fac49a006..4c88da72e 100644
--- a/icu4j/main/classes/core/src/com/ibm/icu/text/DateIntervalFormat.java
+++ b/icu4j/main/classes/core/src/com/ibm/icu/text/DateIntervalFormat.java
@@ -874,8 +874,13 @@ public class DateIntervalFormat extends UFormat {
                 otherPos.setEndIndex(0);
                 datePortion = fDateFormat.format(fromCalendar, datePortion, otherPos);
                 adjustPosition(fDateTimeFormat, fallbackRange, pos, datePortion.toString(), otherPos, pos);
-                fallbackRange = SimpleFormatterImpl.formatRawPattern(
-                        fDateTimeFormat, 2, 2, fallbackRange, datePortion);
+                // Android patch (CLDR ticket #10321) begin.
+                MessageFormat msgFmt = new MessageFormat("");
+                msgFmt.applyPattern(fDateTimeFormat, MessagePattern.ApostropheMode.DOUBLE_REQUIRED);
+                StringBuffer fallbackRangeBuffer = new StringBuffer(128);
+                fallbackRange = msgFmt.format(new Object[] { fallbackRange, datePortion },
+                    fallbackRangeBuffer, new FieldPosition(0)).toString();
+                // Android patch (CLDR ticket #10321) end.
             }
             appendTo.append(fallbackRange);
             if (formatDatePlusTimeRange) {
diff --git a/icu4j/main/classes/core/src/com/ibm/icu/text/RelativeDateTimeFormatter.java b/icu4j/main/classes/core/src/com/ibm/icu/text/RelativeDateTimeFormatter.java
index bd808b46e..465c990a6 100644
--- a/icu4j/main/classes/core/src/com/ibm/icu/text/RelativeDateTimeFormatter.java
+++ b/icu4j/main/classes/core/src/com/ibm/icu/text/RelativeDateTimeFormatter.java
@@ -8,6 +8,7 @@
  */
 package com.ibm.icu.text;
 
+import java.text.FieldPosition;
 import java.util.EnumMap;
 import java.util.Locale;
 
@@ -456,8 +457,8 @@ public final class RelativeDateTimeFormatter {
         return new RelativeDateTimeFormatter(
                 data.qualitativeUnitMap,
                 data.relUnitPatternMap,
-                SimpleFormatterImpl.compileToStringMinMaxArguments(
-                        data.dateTimePattern, new StringBuilder(), 2, 2),
+                // Android-changed: use MessageFormat instead of SimpleFormatterImpl (b/63745717).
+                data.dateTimePattern,
                 PluralRules.forLocale(locale),
                 nf,
                 style,
@@ -708,8 +709,13 @@ public final class RelativeDateTimeFormatter {
      * @stable ICU 53
      */
     public String combineDateAndTime(String relativeDateString, String timeString) {
-        return SimpleFormatterImpl.formatCompiledPattern(
-                combinedDateAndTime, timeString, relativeDateString);
+        // BEGIN Android-changed: use MessageFormat instead of SimpleFormatterImpl (b/63745717).
+        MessageFormat msgFmt = new MessageFormat("");
+        msgFmt.applyPattern(combinedDateAndTime, MessagePattern.ApostropheMode.DOUBLE_REQUIRED);
+        StringBuffer combinedDateTimeBuffer = new StringBuffer(128);
+        return msgFmt.format(new Object[] { timeString, relativeDateString},
+                combinedDateTimeBuffer, new FieldPosition(0)).toString();
+        // END Android-changed: use MessageFormat instead of SimpleFormatterImpl (b/63745717).
     }
 
     /**
@@ -817,7 +823,8 @@ public final class RelativeDateTimeFormatter {
     private final EnumMap<Style, EnumMap<AbsoluteUnit, EnumMap<Direction, String>>> qualitativeUnitMap;
     private final EnumMap<Style, EnumMap<RelativeUnit, String[][]>> patternMap;
 
-    private final String combinedDateAndTime;  // compiled SimpleFormatter pattern
+    // Android-changed: use MessageFormat instead of SimpleFormatterImpl (b/63745717).
+    private final String combinedDateAndTime;  // MessageFormat pattern for combining date and time.
     private final PluralRules pluralRules;
     private final NumberFormat numberFormat;