访问路径被拒绝(Xamarin/Android) [英] Access to path denied (Xamarin/Android)
问题描述
我运行的是 Windows 10、Visual Studio 2015 和 Xamarin.我对 Xamarin 比较陌生(只是为了设置地面).我最近更新后遇到了一个问题.我的应用程序在更新之前正在运行.我的所有文件都是只读的，更新之前我没有遇到任何问题.除此之外，我还重建了该项目，并为该项目进行了清理和重建".我已经用我拥有的多个应用程序尝试过它，其他应用程序没有这个问题.我在下面收到以下错误的问题.
I am running Windows 10, Visual Studio 2015, and Xamarin. I am rather new to Xamarin (just to set the ground level). I am currently having an issue after I updated recently. My application was working before the update. All my files were read-only, and I had no issues prior the update. Along with that, I have rebuilt the project and I the "clean and rebuild" for the project as well. I have tried it with multiple apps I have, and the other applications do not have this issue. The issue I am getting the following error below.
06-26 13:51:55.108 I/MonoDroid( 6985): UNHANDLED EXCEPTION:
06-26 13:51:55.142 I/MonoDroid( 6985): System.UnauthorizedAccessException: Access to the path "/storage/emulated/0/defaultDirectory/users.ini" is denied.
06-26 13:51:55.142 I/MonoDroid( 6985): at System.IO.FileStream..ctor (System.String path, System.IO.FileMode mode, System.IO.FileAccess access, System.IO.FileShare share, System.Int32 bufferSize, System.Boolean anonymous, System.IO.FileOptions options) [0x001f1] in <3fd174ff54b146228c505f23cf75ce71>:0
06-26 13:51:55.142 I/MonoDroid( 6985): at System.IO.FileStream..ctor (System.String path, System.IO.FileMode mode, System.IO.FileAccess access, System.IO.FileShare share, System.Int32 bufferSize, System.IO.FileOptions options, System.String msgPath, System.Boolean bFromProxy, System.Boolean useLongPath, System.Boolean checkHost) [0x00000] in <3fd174ff54b146228c505f23cf75ce71>:0
06-26 13:51:55.142 I/MonoDroid( 6985): at (wrapper remoting-invoke-with-check) System.IO.FileStream:.ctor (string,System.IO.FileMode,System.IO.FileAccess,System.IO.FileShare,int,System.IO.FileOptions,string,bool,bool,bool)
06-26 13:51:55.142 I/MonoDroid( 6985): at System.IO.StreamReader..ctor (System.String path, System.Text.Encoding encoding, System.Boolean detectEncodingFromByteOrderMarks, System.Int32 bufferSize, System.Boolean checkHost) [0x00067] in <3fd174ff54b146228c505f23cf75ce71>:0
06-26 13:51:55.142 I/MonoDroid( 6985): at System.IO.StreamReader..ctor (System.String path, System.Text.Encoding encoding, System.Boolean detectEncodingFromByteOrderMarks, System.Int32 bufferSize) [0x00000] in <3fd174ff54b146228c505f23cf75ce71>:0
06-26 13:51:55.142 I/MonoDroid( 6985): at System.IO.StreamReader..ctor (System.String path, System.Boolean detectEncodingFromByteOrderMarks) [0x0000d] in <3fd174ff54b146228c505f23cf75ce71>:0
06-26 13:51:55.142 I/MonoDroid( 6985): at System.IO.StreamReader..ctor (System.String path) [0x00000] in <3fd174ff54b146228c505f23cf75ce71>:0
06-26 13:51:55.142 I/MonoDroid( 6985): at (wrapper remoting-invoke-with-check) System.IO.StreamReader:.ctor (string)
06-26 13:51:55.142 I/MonoDroid( 6985): at System.IO.File.OpenText (System.String path) [0x00000] in <3fd174ff54b146228c505f23cf75ce71>:0
06-26 13:51:55.142 I/MonoDroid( 6985): at QykAndroidApp.AdminLoginActivity.decryptUsers () [0x00033] in <65a7af1659a443738d96e6c2b7534ab2>:0
06-26 13:51:55.142 I/MonoDroid( 6985): at QykAndroidApp.AdminLoginActivity.OnCreate (Android.OS.Bundle savedInstanceState) [0x0008a] in <65a7af1659a443738d96e6c2b7534ab2>:0
06-26 13:51:55.142 I/MonoDroid( 6985): at Android.App.Activity.n_OnCreate_Landroid_os_Bundle_ (System.IntPtr jnienv, System.IntPtr native__this, System.IntPtr native_savedInstanceState) [0x0000f] in <d855bac285f44dda8a0d8510b679b1e2>:0
06-26 13:51:55.142 I/MonoDroid( 6985): at (wrapper dynamic-method) System.Object:28564880-3429-412d-9c61-4f5bb9fc103e (intptr,intptr,intptr)
06-26 13:51:55.153 W/art ( 6985): JNI RegisterNativeMethods: attempt to register 0 native methods for android.runtime.JavaProxyThrowable
An unhandled exception occured.
我读过几篇文章，例如(我发布了对第 3 项的 Google 搜索，因为我阅读了顶部结果中的几乎所有内容).我尝试以管理员身份运行该程序，并且该目录对任何人都具有开放访问权限.
I've read few articles such as (I posted the Google search for the 3rd item because I read almost everything in the top results). I've tried running the program as an administrator and the directory has open access to anyone.
- 为什么拒绝访问路径?
- System.UnauthorizedAccessException:访问路径..."被拒绝
- https://www.google.com/search?q=RegisterNativeMethods%3A+attempt+to+register+0+native+methods+for+android.runtime.JavaProxyThrowable&oq=RegisterNativeMethods%3A+attempt+to+register+0+native+methods+for+android.runtime.JavaProxyThrowable&aqs=chrome..69i57j69i58.572j0j7&sourceid=chrome&ie=UTF-8
对于任何对我如何访问我的文件的代码感到好奇的人，它在下面.
For anyone curious on the code of how I am accessing my file, it is below.
private List<string> readUsers()
{
adminUsers = new List<string>();
try
{
StreamReader readerForFile;
//create checks for making sure the card is mounted, the directory is found, and the file is found.
var filePath = Path.Combine(Android.OS.Environment.ExternalStorageDirectory.Path, "defaultDirectory/users.ini");
File.SetAttributes(filePath, FileAttributes.Normal);
if (File.Exists(filePath))
{
//Reads enttire document
//var fillContent = File.ReadAllText(filePath);
readerForFile = File.OpenText(filePath);
if (readerForFile == null) { return null; }
else
{
string line = "";
int counter = 0;
while ((line = readerForFile.ReadLine()) != null)
{
adminUsers.Add(line);
counter++;
}
}
}
}
catch (IOException e)
{
//You'll need to add proper error handling here
alert.SetMessage("File was not found. " + e).SetNeutralButton("Okay", delegate { QuestionActivity.exit(); }).Create().Show();
}
return adminUsers;
}
推荐答案
您应该在 Android 中启用 READ_EXTERNAL_STORAGE 和 WRITE_EXTERNAL_STORAGE 权限.您可以关注此博客在运行时启用权限https://devblogs.microsoft.com/xamarin/requesting-runtime-permissions-in-android-marshmallow/
You should enable READ_EXTERNAL_STORAGE and WRITE_EXTERNAL_STORAGE permissions in Android. You can follow this blog to enable the permission in runtime https://devblogs.microsoft.com/xamarin/requesting-runtime-permissions-in-android-marshmallow/
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