diff --git a/core/java/android/provider/Settings.java b/core/java/android/provider/Settings.java
index 2159cf43d6d6d..9abb64f15e996 100644
--- a/core/java/android/provider/Settings.java
+++ b/core/java/android/provider/Settings.java
@@ -7112,24 +7112,8 @@ public final class Settings {
          */
         public static final String TTS_DEFAULT_LOCALE = "tts_default_locale";
 
-        private static final Validator TTS_DEFAULT_LOCALE_VALIDATOR = new Validator() {
-            @Override
-            public boolean validate(@Nullable String value) {
-                if (value == null || value.length() == 0) {
-                    return false;
-                }
-                String[] ttsLocales = value.split(",");
-                boolean valid = true;
-                for (String ttsLocale : ttsLocales) {
-                    String[] parts = ttsLocale.split(":");
-                    valid |= ((parts.length == 2)
-                            && (parts[0].length() > 0)
-                            && ANY_STRING_VALIDATOR.validate(parts[0])
-                            && LOCALE_VALIDATOR.validate(parts[1]));
-                }
-                return valid;
-            }
-        };
+        private static final Validator TTS_DEFAULT_LOCALE_VALIDATOR =
+                new SettingsValidators.TTSListValidator();
 
         /**
          * Space delimited list of plugin packages that are enabled.
@@ -8649,25 +8633,13 @@ public final class Settings {
 
         /**
          * Holds comma separated list of ordering of QS tiles.
+         *
          * @hide
          */
         public static final String QS_TILES = "sysui_qs_tiles";
 
-        private static final Validator QS_TILES_VALIDATOR = new Validator() {
-            @Override
-            public boolean validate(@Nullable String value) {
-                if (value == null) {
-                    return false;
-                }
-                String[] tiles = value.split(",");
-                boolean valid = true;
-                for (String tile : tiles) {
-                    // tile can be any non-empty string as specified by OEM
-                    valid |= ((tile.length() > 0) && ANY_STRING_VALIDATOR.validate(tile));
-                }
-                return valid;
-            }
-        };
+        private static final Validator QS_TILES_VALIDATOR =
+                new SettingsValidators.TileListValidator();
 
         /**
          * Specifies whether the web action API is enabled.
@@ -8733,21 +8705,8 @@ public final class Settings {
          */
         public static final String QS_AUTO_ADDED_TILES = "qs_auto_tiles";
 
-        private static final Validator QS_AUTO_ADDED_TILES_VALIDATOR = new Validator() {
-            @Override
-            public boolean validate(@Nullable String value) {
-                if (value == null) {
-                    return false;
-                }
-                String[] tiles = value.split(",");
-                boolean valid = true;
-                for (String tile : tiles) {
-                    // tile can be any non-empty string as specified by OEM
-                    valid |= ((tile.length() > 0) && ANY_STRING_VALIDATOR.validate(tile));
-                }
-                return valid;
-            }
-        };
+        private static final Validator QS_AUTO_ADDED_TILES_VALIDATOR =
+                new SettingsValidators.TileListValidator();
 
         /**
          * Whether the Lockdown button should be shown in the power menu.
diff --git a/core/java/android/provider/SettingsValidators.java b/core/java/android/provider/SettingsValidators.java
index 405121378d1f1..e4cf9fd6aaee4 100644
--- a/core/java/android/provider/SettingsValidators.java
+++ b/core/java/android/provider/SettingsValidators.java
@@ -283,4 +283,50 @@ public class SettingsValidators {
             return true;
         }
     }
+
+    private abstract static class ListValidator implements Validator {
+        public boolean validate(@Nullable String value) {
+            if (!isEntryValid(value)) {
+                return false;
+            }
+            String[] items = value.split(",");
+            for (String item : items) {
+                if (!isItemValid(item)) {
+                    return false;
+                }
+            }
+            return true;
+        }
+
+        protected abstract boolean isEntryValid(String entry);
+
+        protected abstract boolean isItemValid(String item);
+    }
+
+    /** Ensure a restored value is a string in the format the text-to-speech system handles */
+    public static final class TTSListValidator extends ListValidator {
+        protected boolean isEntryValid(String entry) {
+            return entry != null && entry.length() > 0;
+        }
+
+        protected boolean isItemValid(String item) {
+            String[] parts = item.split(":");
+            // Replaces any old language separator (-) with the new one (_)
+            return ((parts.length == 2)
+                    && (parts[0].length() > 0)
+                    && ANY_STRING_VALIDATOR.validate(parts[0])
+                    && LOCALE_VALIDATOR.validate(parts[1].replace('-', '_')));
+        }
+    }
+
+    /** Ensure a restored value is suitable to be used as a tile name */
+    public static final class TileListValidator extends ListValidator {
+        protected boolean isEntryValid(String entry) {
+            return entry != null;
+        }
+
+        protected boolean isItemValid(String item) {
+            return item.length() > 0 && ANY_STRING_VALIDATOR.validate(item);
+        }
+    }
 }
diff --git a/core/tests/coretests/src/android/provider/SettingsValidatorsTest.java b/core/tests/coretests/src/android/provider/SettingsValidatorsTest.java
index 8081e9e6c67bd..eea8c83e036ba 100644
--- a/core/tests/coretests/src/android/provider/SettingsValidatorsTest.java
+++ b/core/tests/coretests/src/android/provider/SettingsValidatorsTest.java
@@ -254,6 +254,55 @@ public class SettingsValidatorsTest {
         failIfOffendersPresent(offenders, "Settings.System");
     }
 
+    @Test
+    public void testTTSListValidator_withValidInput_returnsTrue() {
+        Validator v = new SettingsValidators.TTSListValidator();
+
+        assertTrue(v.validate("com.foo.ttsengine:en-US,com.bar.ttsengine:es_ES"));
+    }
+
+    @Test
+    public void testTTSListValidator_withInvalidInput_returnsFalse() {
+        Validator v = new SettingsValidators.TTSListValidator();
+
+        assertFalse(v.validate("com.foo.ttsengine:eng-USA,INVALID"));
+    }
+
+    @Test
+    public void testTTSListValidator_withEmptyInput_returnsFalse() {
+        Validator v = new SettingsValidators.TTSListValidator();
+
+        assertFalse(v.validate(""));
+    }
+
+    @Test
+    public void testTTSListValidator_withNullInput_returnsFalse() {
+        Validator v = new SettingsValidators.TTSListValidator();
+
+        assertFalse(v.validate(null));
+    }
+
+    @Test
+    public void testTileListValidator_withValidInput_returnsTrue() {
+        Validator v = new SettingsValidators.TileListValidator();
+
+        assertTrue(v.validate("1,2,3,4"));
+    }
+
+    @Test
+    public void testTileListValidator_withMissingValue_returnsFalse() {
+        Validator v = new SettingsValidators.TileListValidator();
+
+        assertFalse(v.validate("1,,3"));
+    }
+
+    @Test
+    public void testTileListValidator_withNullInput_returnsFalse() {
+        Validator v = new SettingsValidators.TileListValidator();
+
+        assertFalse(v.validate(null));
+    }
+
     @Test
     public void ensureAllBackedUpGlobalSettingsHaveValidators() {
         String offenders = getOffenders(concat(Settings.Global.SETTINGS_TO_BACKUP,