Writing binary files on Android

Questions & Answers
1

I have this code snippet to save/load class objects into/from binary files. It works perfectly on Windows:

public static void SaveFile(string filename, System.Object obj)
{
    try
    {
        filename = Application.dataPath + @"\Resources\SaveLoad\" + filename;
        Stream fileStream = File.Open(filename, FileMode.Create, FileAccess.Write);
        BinaryFormatter formatter = new BinaryFormatter();
        formatter.Serialize(fileStream, obj);
        fileStream.Close();
    } 
    catch (Exception e)
    {
        Debug.LogWarning("Save.SaveFile(): Failed to serialize object to a file " + filename + " (Reason: " + e.Message + ")");
    }
}

public static System.Object LoadFile(string filename)
{
    try
    {
        filename = Application.dataPath + @"\Resources\SaveLoad\" + filename;
        Stream fileStream = File.Open(filename, FileMode.Open, FileAccess.Read);
        BinaryFormatter formatter = new BinaryFormatter();
        System.Object obj = formatter.Deserialize(fileStream);
        fileStream.Close();
        return obj;
    } 
    catch (Exception e)
    {
        Debug.LogWarning("SaveLoad.LoadFile(): Failed to deserialize a file " + filename + " (Reason: " + e.Message + ")");
        return null;
    }       
}

What modifications have I to do to make it save/load properly on Android? And hopefully on all other mobile platforms as well.

2

Don’t use “Application.dataPath” but use Application.persistentDataPath. This will return a path that is ment to store and load data on any build platform except web platforms where FileIO isn’t available.