序列化无法在Android上运行 - Unity

Question

问题

我的问题是，当我将游戏构建为.apk时，我无法在Android上序列化和反序列化列表。代码在Unity编辑器中工作正常。我无法收到任何错误消息，因为问题只会在我构建游戏时出现。

设置文件路径

private void Start () {
    if (Application.platform == RuntimePlatform.Android) {
        // Android
        string oriPath = Path.Combine (Application.streamingAssetsPath, "Data.xml");

        // Android only use WWW to read file
        WWW reader = new WWW (oriPath);
        while (!reader.isDone) { }

        string realPath = Application.persistentDataPath + "/Data";
        File.WriteAllBytes (realPath, reader.bytes);

        dbPath = realPath;
    } else {
        // iOS and Unity Editor
        dbPath = Path.Combine (Application.streamingAssetsPath, "Data.xml");
    }
}

从文件加载

public void LoadItems () {
    FileStream stream;

    if (!File.Exists(dbPath)) {
        stream = new FileStream (dbPath, FileMode.Create);
        stream.Close ();
        stream.Dispose ();
    }

    stream = new FileStream (dbPath, FileMode.Open);

    if (stream.Length != 0) {
        materialDB = serializer.Deserialize (stream) as MaterialDB;
        stream.Close ();
    }

    stream.Dispose ();
}

保存到文件

public void SaveItems () {
    FileStream stream = new FileStream (dbPath, FileMode.Create);

    serializer.Serialize (stream, materialDB);
    stream.Close ();

    stream.Dispose ();
}