C# Xamarin，Plugin.FilePicker->；例外情况：“…”；。。。视图=DecorView

在我的Xamarin项目中，我使用Plugin.FilePicker，除了一个例外，其他一切都正常

如果执行从2到6次选择文件的操作，并且单击后退按钮的次数相同，则会出现异常：

Unhandled Exception:

Java.Lang.IllegalArgumentException: View=DecorView@b10016d[] not attached to window manager

使用插件的类完全由try、catch块组成。在另一个类中，我使用了前一个类的方法，我还配备了try，catch块-仅用于检查。它不会捕获任何地方的异常

该项目是在Android和UWP上编写的。它发生在android上，但在UWP上没有

有什么想法吗

编辑

谢谢回答：）这是我代码的一部分：

public  class FilePickerService
    {
        private FileData fileData;
        public FilePickerService()
        {
            fileData = new FileData();
        }

        public async Task<bool> pickFile()
        {
            try
            {
                fileData = await CrossFilePicker.Current.PickFile();
                if (fileData == null)
                    return false; // user canceled file picking
                else
                {
                    string fileName = fileData.FileName;
                    string contents = System.Text.Encoding.UTF8.GetString(fileData.DataArray);

                    System.Console.WriteLine("File name chosen: " + fileName);
                    System.Console.WriteLine("File data: " + contents);

                    return true;
                }

            }
            catch (Exception ex)
            {
                System.Console.WriteLine("Exception choosing file: " + ex.ToString());
                return false;
            }
        }
        public FileData getFileData()
        {
            try
            {
                if (fileData != null)
                {
                    return fileData;
                }
                else
                {
                    return null;
                }
            }
            catch(Exception ex)
            {
                var error = ex.Message;
                return null;
            }

        }
        public string getFileName()
        {
            try
            {
                string fileName = fileData.FileName;
                return fileName;
            }
            catch(Exception ex)
            {
                var error = ex.Message;
                return "";
            }


        }

        public string getFileContents()
        {
            try
            {
                string contents = System.Text.Encoding.UTF8.GetString(fileData.DataArray);
                return contents;
            }
            catch (Exception ex)
            {
                var error = ex.Message;
                return "";
            }

        }

        public bool fileIsPicture()
        {
            try
            {
                string fileName = fileData.FileName;
                bool isJPG = false;
                bool isPNG = false;

                isJPG = Path.GetExtension(fileName).Equals(".jpg", StringComparison.InvariantCultureIgnoreCase) || Path.GetExtension(fileName).Equals(".jpeg", StringComparison.InvariantCultureIgnoreCase);
                isPNG = Path.GetExtension(fileName).Equals(".png", StringComparison.InvariantCultureIgnoreCase);

                if (isJPG == true || isPNG == true)
                {
                    return true;
                }
                else
                {
                    return false;
                }
            }
            catch(Exception ex)
            {
                var error = ex.Message;
                return false;
            }
        }

        public bool fileIsExist()
        {
            try
            {
                if (fileData != null)
                {
                    return true;
                }
                else
                {
                    return false;
                }
            }
            catch(Exception ex)
            {
                var error = ex.Message;
                return false;
            }

        }
    }

类似的代码可用于选择3个文件。下面我给出了三分之一的支持

    public Image imagePhotoOne;
    public Image imageTakePhotoOne;
    private Service.FilePickerService serviceImagePickerOne;

//Another code...

    imagePhotoOne = new Image();
    imageTakePhotoOne = new Image();
    serviceImagePickerOne = new Service.FilePickerService();

//Another code...

     TapGestureRecognizer tapGestureImageTakePhotoOne = new TapGestureRecognizer();
                tapGestureImageTakePhotoOne.Tapped += async (sender, e) =>
                {
                    try
                    {
                        var status = await serviceImagePickerOne.pickFile();

                        if (status == true)
                        {
                            if (serviceImagePickerOne.fileIsPicture() == true)
                            {
                                imagePhotoOne.IsVisible = true;
                                imageTakePhotoOne.IsVisible = false;
                                imagePhotoOne.Source = ImageSource.FromStream(() =>
                                {
                                    return new MemoryStream(serviceImagePickerOne.getFileData().DataArray);
                                });

                            }
                            else
                            {
                                await Task.Delay(100);
                                UserDialogs.Instance.Toast("Zdjecie nie jest w formacje .jpg/.jpeg/.png");
                                await Task.Delay(100);
                                imagePhotoOne.IsVisible = false;
                                imageTakePhotoOne.IsVisible = true;
                                imagePhotoOne.Source = null;
                            }
                        }
                        else
                        {
                            await Task.Delay(100);
                            UserDialogs.Instance.Toast("Nie wybrano pliku");
                            await Task.Delay(100);
                        }
                    }
                    catch(Exception ex)
                    {
                        var error = ex.Message;
                    }

                };
                imageTakePhotoOne.GestureRecognizers.Add(tapGestureImageTakePhotoOne);

public Label labelFileOne;
public Image imageTakeFileOne;
private Service.FilePickerService serviceFilePickerOne;

//Code create elements

 TapGestureRecognizer tapGestureImageTakeFileOne = new TapGestureRecognizer();
            tapGestureImageTakeFileOne.Tapped += async (sender, e) =>
            {
                try
                {
                    var status = await serviceFilePickerOne.pickFile();

                    if (status == true)
                    {
                        if (serviceFilePickerOne.getFileData() != null)
                        {
                            labelFileOne.IsVisible = true;
                            labelFileOne.Text = serviceFilePickerOne.getFileName();
                            imageTakeFileOne.IsVisible = false;
                        }
                        else
                        {
                            await Task.Delay(100);
                            UserDialogs.Instance.Toast("Nie udało się wczytać pliku");
                            await Task.Delay(100);
                            labelFileOne.IsVisible = false;
                            labelFileOne.Text = "";
                            imageTakeFileOne.IsVisible = false;
                        }
                    }
                    else
                    {
                        await Task.Delay(100);
                        UserDialogs.Instance.Toast("Nie wybrano pliku");
                        await Task.Delay(100);
                    }
                }
               catch(Exception ex)
                {
                    var error = ex.Message;
                }


            };
            imageTakeFileOne.GestureRecognizers.Add(tapGestureImageTakeFileOne);

---

当我使用Plugin.FilePicker 3到6次时会发生错误，但我不会每次都选择任何文件。答案编辑 看起来您需要媒体选择器，因为您只选择png和jpeg文件。我复制了你正在使用的插件的问题。请改用xam.plugin.media，它会解决您的问题