Google Cloud Save Data returns empty.

Question

Hello, I have been trying to implement Google Cloud Save for the last couple of days but it is not working right. I am able to save my data locally using BinaryFormatter and FileStream but I can't seem to get it working for Google Cloud Save. Somehow I can store my data but when I try to load, it returns empty. I know I am not converting my data to byte correctly but I can't seem to figure out how to do it correctly. I am wondering where did I go wrong and is there a better way to store data to Google Cloud Save (such as using JSON?, Protobuff?, XML?). If so, which one is more ideal for mobile development. Thanks in advance for any help.

     public void OnSavedGameOpened(SavedGameRequestStatus status, ISavedGameMetadata game)
     {
         if (status == SavedGameRequestStatus.Success)
         {
             if (isSaving) // Writing our data to cloud
             {
                 try
                 {
                     BinaryFormatter bf = new BinaryFormatter();
                     MemoryStream ms = new MemoryStream();
                     CharacterStatistics savedData = new CharacterStatistics();
                     savedData = PlayerState.Instance.localPlayerData;
                     bf.Serialize(ms, savedData);
                     //ms.Flush();
                     byte[] myByteArray = ms.ToArray();
 
                     //byte[] myByteArray;
                     //using (MemoryStream stream = new MemoryStream())
                     //{
                     //    bf.Serialize(stream, savedData);
                     //    myByteArray = stream.ToArray();
                     //}
 
                     Debug.Log("Current Leve: " + savedData.Level + " Current XP: " + savedData.CurrentXP);
 
                     SavedGameMetadataUpdate.Builder builder = new SavedGameMetadataUpdate.Builder()
                         .WithUpdatedPlayedTime(TimeSpan.FromMinutes(game.TotalTimePlayed.Minutes + 1))
                         .WithUpdatedDescription("Saved game at " + DateTime.Now);
 
                     SavedGameMetadataUpdate updatedMetadata = builder.Build();
                     ((PlayGamesPlatform)Social.Active).SavedGame.CommitUpdate(game, updatedMetadata, myByteArray, OnSavedGameWritten);
                 }
                 catch (Exception e)
                 {
                     Debug.Log(" Saved Game Write: convert exception");
                 }
             }
             else // Reading our data from the cloud
             {
                 ((PlayGamesPlatform)Social.Active).SavedGame.ReadBinaryData(game, OnSavedGameDataRead);
                 Debug.Log("Reading our data from cloud.");
             }
         }
         else
         {
             Debug.Log("Error, cannot save data: " + status);
         }
     }
 
     public void OnSavedGameDataRead(SavedGameRequestStatus status, byte[] data)
     {
         if (status == SavedGameRequestStatus.Success)
         {
             if (isReading) // Reading our data from the Cloud
             {
                 // handle processing the byte array data
                 Debug.Log("Reading data from cloud saved.");
             }
             else // Loading our data from the Cloud.
             {
                 // handle processing the byte array data
                 if (data == null)
                 {
                     Debug.Log("No data saved to the cloud yet...");
                     //LoadLocal();
                     return;
                 }
                 CharacterStatistics savedData = FromBytes<CharacterStatistics>(data);
                 Debug.Log("Loading data from cloud.");
             }
         }
         else
         {
             // handle error
             Debug.Log("Error reading game: " + status);
         }
     }

Answer 1

This video is worth a watch.

https://www.youtube.com/watch?v=k293WyNSQEE

Make sure your initialization looks something like this:

 PlayGamesClientConfiguration config = new PlayGamesClientConfiguration.Builder().EnableSavedGames().Build();
         PlayGamesPlatform.InitializeInstance(config);
         PlayGamesPlatform.Activate();

take special note to call Activate() after initializing. Make sure you're not calling Activate() anywhere else. This tends to be a gotcha for a lot of people.

For parsing in the byte[] data. This block worked for me in my test script.

 if(status == SavedGameRequestStatus.Success)
         {
             BinaryFormatter bf = new BinaryFormatter();
             MemoryStream ms = new MemoryStream(data);
             SaveTest saveTest =  (SaveTest)bf.Deserialize(ms);
 
             Instance.score = saveTest.score;
         }

Further, the error you're getting: "SerializationException: serializationStream supports seeking, but its length is 0" suggests that your save is not actually writing anything.
Try the same implementation on a local filestream save and open up the resulting file in your operating system and see if the file is empty or not.

Alternatively you could be getting this error due to mismatching the saved filenames or other reasons completely. Would need to see the methods that call OnSavedGameOpened() to troubleshoot that.

Google Cloud Save Data returns empty.

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