'Xamarin System.ObjectDisposedException: 'Cannot access a closed Stream.'
I'm working on a mobile project with Xamarin Forms and I have this error in particulary case but, it's impossible to use the debuger to fix it.
System.ObjectDisposedException: 'Cannot access a closed Stream.'
Little bit of context: I am in a TabPage ( from DevExpress ) and when I navigate through the tab, this error occurs sometimes.
So I use a little bit of Stream object in my code, but honestly I don't know where could be the error.
So here is my code with Stream object
public async Task<bool> TakePhotoAsync()
{
try
{
var photo = await MediaPicker.CapturePhotoAsync();
await LoadPhotoAsync(photo);
Console.WriteLine($"CapturePhotoAsync COMPLETED: {PhotoPath}");
return true;
}
catch (FeatureNotSupportedException fnsEx)
{
Console.WriteLine("Device not supported");
return false;
}
catch (PermissionException pEx)
{
Console.WriteLine("Permission non accordée");
return false;
}
catch (Exception ex)
{
Console.WriteLine($"CapturePhotoAsync THREW: {ex.Message}");
return false;
}
}
public async Task LoadPhotoAsync(FileResult photo)
{
// canceled
string path = "";
if (photo == null)
{
this.PhotoPath = null;
return;
}
// save the file into local storage
using (var stream = await photo.OpenReadAsync())
DependencyService.Get<IDeviceDependency>().SaveImage(stream, "photo", $"{bon.DOSSIER.DODOS}_BT_{bon.CLE_DOSPRESTA_BON}_{NbPhoto++}.png", ref path);
this.PhotoPath = path;
}
public class MyDependencyService: IDeviceDependency
{
public bool SaveImage(Stream image, string directory, string name, ref string PhotoPath)
{
string path = Android.App.Application.Context.GetExternalFilesDir(directory).AbsolutePath;
if (!Directory.Exists(path)) Directory.CreateDirectory(path);
if (image != null && image.CanWrite)
{
MemoryStream ms = new MemoryStream();
image.CopyTo(ms);
path = System.IO.Path.Combine(path, name);
PhotoPath = path;
File.WriteAllBytes(path, ms.ToArray());
return true;
}
return false;
}
public bool SaveImage(Stream image, string directory, string name)
{
string value = "";
return this.SaveImage(image, directory, name, ref value);
}
public FileStream ShowImage(string directory, string name)
{
string path = System.IO.Path.Combine(Android.App.Application.Context.GetExternalFilesDir(directory).AbsolutePath, name);
FileStream stream = null;
if (File.Exists(path))
{
try
{
stream = new FileStream(path, FileMode.Open);
}
catch (Exception e) { Console.WriteLine(e.Message); }
}
return stream;
}
public bool DeleteFile(string directory, string name)
{
string path = System.IO.Path.Combine(Android.App.Application.Context.GetExternalFilesDir(directory).AbsolutePath, name);
if (File.Exists(path))
{
File.Delete(path);
return true;
}
return false;
}
public Stream ResizeImageAndroid(byte[] imageData, double width, double height)
{
if ( imageData.Length > 0 )
{
// Load the bitmap
Bitmap originalImage = BitmapFactory.DecodeByteArray(imageData, 0, imageData.Length);
Bitmap resizedImage = Bitmap.CreateScaledBitmap(originalImage, (int)width, (int)height, false);
MemoryStream ms = new MemoryStream();
resizedImage.Compress(Bitmap.CompressFormat.Png, 100, ms);
return new MemoryStream(ms.ToArray());
}
return null;
}
public string GetExternalXMLPath(string name)
{
return System.IO.Path.Combine(Android.App.Application.Context.GetExternalFilesDir("xml").AbsolutePath, name);
}
protected override void OnAppearing()
{
this.Model.ExecuteRefreshCommand();
FileStream stream = DependencyService.Get<IDeviceDependency>().ShowImage("signature", "76");
Stream streamImg;
double rapport = this.ImgSignature.HeightRequest/Signature.HAUTEUR_SIGNATURE;
if (stream != null && stream.CanWrite)
{
MemoryStream ms = new MemoryStream();
stream.CopyTo(ms);
streamImg = DependencyService.Get<IDeviceDependency>().ResizeImageAndroid(ms.ToArray(), rapport*(App.Current.MainPage.Width - 30),
rapport*Signature.HAUTEUR_SIGNATURE);
if (streamImg != null && streamImg.CanRead)this.ImgSignature.Icon = ImageSource.FromStream(() => streamImg);
}
base.OnAppearing();
}
UPDATE I also find the call stack error for [External Code] look like this
0xFFFFFFFFFFFFFFFF in System.Diagnostics.Debugger.Mono_UnhandledException_internal C#
0x1 in System.Diagnostics.Debugger.Mono_UnhandledException at /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/mcs/class/corlib/System.Diagnostics/Debugger.cs:125,4 C#
0x33 in Android.Runtime.DynamicMethodNameCounter.84 C#
0xD in System.IO.MemoryStream.EnsureNotClosed at /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/external/corefx/src/Common/src/CoreLib/System/IO/MemoryStream.cs:121,17 C#
0x4F in System.IO.MemoryStream.Read at /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/external/corefx/src/Common/src/CoreLib/System/IO/MemoryStream.cs:369,13 C#
0x9 in Android.Runtime.InputStreamAdapter.Read at /Users/builder/azdo/_work/1/s/xamarin-android/src/Mono.Android/Android.Runtime/InputStreamAdapter.cs:38,4 C#
0x23 in Java.IO.InputStream.n_Read_arrayBII at /Users/builder/azdo/_work/1/s/xamarin-android/src/Mono.Android/obj/Release/monoandroid10/android-30/mcw/Java.IO.InputStream.cs:251,4 C#
0x23 in Android.Runtime.DynamicMethodNameCounter.84 C#
0xFFFFFFFFFFFFFFFF in Java.Interop.NativeMethods.java_interop_jnienv_call_static_object_method_a C#
0x59 in Java.Interop.JniEnvironment.StaticMethods.CallStaticObjectMethod C#
0x1A in Java.Interop.JniPeerMembers.JniStaticMethods.InvokeObjectMethod C#
0x2F in Android.Graphics.BitmapFactory.DecodeStream at /Users/builder/azdo/_work/1/s/xamarin-android/src/Mono.Android/obj/Release/monoandroid10/android-30/mcw/Android.Graphics.BitmapFactory.cs:825,5 C#
0x6 in Android.Graphics.BitmapFactory. at /Users/builder/azdo/_work/1/s/xamarin-android/src/Mono.Android/obj/Release/monoandroid10/android-30/mcw/Android.Graphics.BitmapFactory.cs:835,58 C#
0x11 in System.Threading.Tasks.Task<Android.Graphics.Bitmap>.InnerInvoke at /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/external/corert/src/System.Private.CoreLib/src/System/Threading/Tasks/Future.cs:534,17 C#
0x1 in System.Threading.Tasks.Task.Execute at /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/external/corert/src/System.Private.CoreLib/src/System/Threading/Tasks/Task.cs:2319,17 C#
0x6 in System.Threading.Tasks.Task.ExecutionContextCallback at /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/external/corert/src/System.Private.CoreLib/src/System/Threading/Tasks/Task.cs:2463,13 C#
0x73 in System.Threading.ExecutionContext.RunInternal at /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/mcs/class/referencesource/mscorlib/system/threading/executioncontext.cs:968,17 C#
0x4 in System.Threading.ExecutionContext.Run at /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/mcs/class/referencesource/mscorlib/system/threading/executioncontext.cs:910,13 C#
0x38 in System.Threading.Tasks.Task.ExecuteWithThreadLocal at /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/mcs/class/corlib/corert/Task.cs:72,6 C#
0x50 in System.Threading.Tasks.Task.ExecuteEntry at /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/external/corert/src/System.Private.CoreLib/src/System/Threading/Tasks/Task.cs:2385,17 C#
0x2 in System.Threading.Tasks.Task.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem at /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/external/corert/src/System.Private.CoreLib/src/System/Threading/Tasks/Task.cs:2334,13 C#
0x75 in System.Threading.ThreadPoolWorkQueue.Dispatch at /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/mcs/class/referencesource/mscorlib/system/threading/threadpool.cs:899,29 C#
0x0 in System.Threading._ThreadPoolWaitCallback.PerformWaitCallback at /Users/builder/jenkins/workspace/archive-mono/2020-02/android/release/mcs/class/referencesource/mscorlib/system/threading/threadpool.cs:1261,13 C#
Solution 1:[1]
I find an issue, According to the [External error], the error occurs from the Bitmap.Decode function. So I just delete this part of code and replace my Simplebutton with Icon by an ImageIcon and the resize was automatic so don't need of Bitmap.
Regards for your help!!
Sources
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Source: Stack Overflow
| Solution | Source |
|---|---|
| Solution 1 |