Android Unity c＃：UnauthorizedAccessException写保存游戏数据

我在Android中调试Unity游戏，一切工作在Unity编辑器中。在Android上保存当前游戏数据时，我收到UnauthorizedAccessException。Android Unity c＃：UnauthorizedAccessException写保存游戏数据

我正在写入persistentDataPath，所以我不明白为什么访问被阻止。

下面是使用的logcat控制台日志：

<i>AndroidPlayer(motorola_Moto_G_(5)@192.168.0.26)</i> UnauthorizedAccessException: 
Access to the path "/current.sg" is denied. 
at System.IO.FileStream..ctor (System.String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, Boolean anonymous, FileOptions options) [0x0028a] in /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.IO/FileStream.cs:320 
    at System.IO.FileStream..ctor (System.String path, FileMode mode) [0x00000] in <filename unknown>:0 
    at SaveLoadManager.SaveGame (.Game currentGame) [0x0002a] in F:\Work\Magister\Magister\Magister\Assets\Scripts\SaveLoadManager.cs:16 
    at PlayerController.FixedUpdate() [0x0058e] in F:\Work\Magister\Magister\Magister\Assets\Scripts\PlayerController.cs:244

从的PlayerController在FixedUpdate（）循环运行相关的代码：

if (!gameSaved) 
{ 
    SaveLoadManager.SaveGame(gameManager.GetComponent<Game>()); 
    gameSaved = true; 
}

游戏存档功能从SaveLoadManager：

public static void SaveGame(Game currentGame) 
{ 
    string saveGameFileName = Path.DirectorySeparatorChar + "current.sg"; 
    string filePath = Path.Combine(Application.persistentDataPath, saveGameFileName); 
    BinaryFormatter bf = new BinaryFormatter(); 
    FileStream file = new FileStream(filePath, FileMode.Create); 
    GameData data = new GameData(currentGame); 
    bf.Serialize(file, data); 
    file.Close(); 
}

AndroidManifest.xml中的读写权限：

<uses-permission 
    android:name="android.permission.WRITE_EXTERNAL_STORAGE" 
    android:maxSdkVersion="18" /> 

<uses-permission 
    android:name="android.permission.READ_EXTERNAL_STORAGE" 
    android:maxSdkVersion="18" />

来源

2017-10-13 Era

我想'Path.Combine'是治疗'saveGameFileName'绝对路径，这意味着你要写入根目录。尝试将'string saveGameFileName = Path.DirectorySeparatorChar +“current.sg”'更改为'string saveGameFileName =“current.sg”'。 –

在写入该路径之前，您必须检查目录是否存在Directory.Exists。如果没有，请使用Directory.CreateDirectory来创建它。

请注意，将文件直接保存到Application.persistentDataPath不是一个好主意。你必须先在里面创建一个文件夹，然后把你的文件保存到该文件夹中。所以Application.persistentDataPath/yourcreatedfolder/yourfile.extension是好的。通过这样做，你的代码也可以在iOS上运行。

这是代码应该是什么样子：

string saveGameFileName = "current"; 
string filePath = Path.Combine(Application.persistentDataPath, "data"); 
filePath = Path.Combine(filePath, saveGameFileName + ".sg"); 


//Create Directory if it does not exist 
if (!Directory.Exists(Path.GetDirectoryName(filePath))) 
{ 
    Directory.CreateDirectory(Path.GetDirectoryName(filePath)); 
} 

try 
{ 
    BinaryFormatter bf = new BinaryFormatter(); 
    FileStream file = new FileStream(filePath, FileMode.Create); 
    GameData data = new GameData(currentGame); 
    bf.Serialize(file, data); 
    file.Close(); 
    Debug.Log("Saved Data to: " + filePath.Replace("/", "\\")); 
} 
catch (Exception e) 
{ 
    Debug.LogWarning("Failed To Save Data to: " + filePath.Replace("/", "\\")); 
    Debug.LogWarning("Error: " + e.Message); 
}

来源

2017-10-13 18:26:44 Programmer

Android Unity c＃：UnauthorizedAccessException写保存游戏数据

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