Question

我在Android中调试Unity游戏，一切都在Unity编辑器中运行。我在Android上保存当前游戏数据时收到UnauthorizedAccessException。

我写信给persistentDataPath，所以我不明白访问被阻止的原因。

以下是使用Logcat的控制台日志：

<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

在FixedUpdate（）循环中运行的PlayerController的相关代码：

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

SaveLoadManager中的SaveGame函数：

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" />

Answer 1

在写入该路径之前，您必须检查目录是否与Directory.Exists一起存在。如果没有，请使用Directory.CreateDirectory创建它。

请注意，将文件直接保存到Application.persistentDataPath并不是一个好主意。您必须先在其中创建一个文件夹，然后将文件保存在该文件夹中。所以Application.persistentDataPath/yourcreatedfolder/yourfile.extension没问题。通过这样做，您的代码也可以在iOS上运行。

这就是代码的样子：

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);
}

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

1 个答案: