1 files changed, 8 insertions, 13 deletions

diff --git a/core/java/android/app/NotificationChannelGroup.java b/core/java/android/app/NotificationChannelGroup.java
index f97415ca20c8..1769993e0e07 100644
--- a/core/java/android/app/NotificationChannelGroup.java
+++ b/core/java/android/app/NotificationChannelGroup.java
@@ -20,6 +20,7 @@ import android.annotation.SystemApi;
 import android.annotation.TestApi;
 import android.compat.annotation.UnsupportedAppUsage;
 import android.content.Intent;
+import android.content.pm.ParceledListSlice;
 import android.os.Parcel;
 import android.os.Parcelable;
 import android.text.TextUtils;
@@ -66,7 +67,7 @@ public final class NotificationChannelGroup implements Parcelable {
     private CharSequence mName;
     private String mDescription;
     private boolean mBlocked;
-    private List<NotificationChannel> mChannels = new ArrayList<>();
+    private ParceledListSlice<NotificationChannel> mChannels;
     // Bitwise representation of fields that have been changed by the user
     private int mUserLockedFields;
 
@@ -100,7 +101,8 @@ public final class NotificationChannelGroup implements Parcelable {
         } else {
             mDescription = null;
         }
-        in.readParcelableList(mChannels, NotificationChannel.class.getClassLoader(), android.app.NotificationChannel.class);
+        mChannels = in.readParcelable(
+                NotificationChannelGroup.class.getClassLoader(), ParceledListSlice.class);
         mBlocked = in.readBoolean();
         mUserLockedFields = in.readInt();
     }
@@ -127,7 +129,7 @@ public final class NotificationChannelGroup implements Parcelable {
         } else {
             dest.writeByte((byte) 0);
         }
-        dest.writeParcelableList(mChannels, flags);
+        dest.writeParcelable(mChannels, flags);
         dest.writeBoolean(mBlocked);
         dest.writeInt(mUserLockedFields);
     }
@@ -157,7 +159,7 @@ public final class NotificationChannelGroup implements Parcelable {
      * Returns the list of channels that belong to this group
      */
     public List<NotificationChannel> getChannels() {
-        return mChannels;
+        return mChannels == null ? new ArrayList<>() : mChannels.getList();
     }
 
     /**
@@ -191,15 +193,8 @@ public final class NotificationChannelGroup implements Parcelable {
     /**
      * @hide
      */
-    public void addChannel(NotificationChannel channel) {
-        mChannels.add(channel);
-    }
-
-    /**
-     * @hide
-     */
     public void setChannels(List<NotificationChannel> channels) {
-        mChannels = channels;
+        mChannels = new ParceledListSlice<>(channels);
     }
 
     /**
@@ -334,7 +329,7 @@ public final class NotificationChannelGroup implements Parcelable {
         proto.write(NotificationChannelGroupProto.NAME, mName.toString());
         proto.write(NotificationChannelGroupProto.DESCRIPTION, mDescription);
         proto.write(NotificationChannelGroupProto.IS_BLOCKED, mBlocked);
-        for (NotificationChannel channel : mChannels) {
+        for (NotificationChannel channel : mChannels.getList()) {
             channel.dumpDebug(proto, NotificationChannelGroupProto.CHANNELS);
         }
         proto.end(token);