public async Task SaveAndView(string fileName, String contentType, MemoryStream stream, PDFOpenContext context)
{
string exception = string.Empty;
string root = null;
if (ContextCompat.CheckSelfPermission(Forms.Context, Manifest.Permission.WriteExternalStorage) != Permission.Granted)
{
ActivityCompat.RequestPermissions((Activity)Forms.Context, new String[] { Manifest.Permission.WriteExternalStorage }, 1);
}
if (Android.OS.Environment.IsExternalStorageEmulated)
{
root = Android.OS.Environment.ExternalStorageDirectory.ToString();
}
else
{
root = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments);
}
Java.IO.File myDir = new Java.IO.File(root + "/PDFFiles");
myDir.Mkdir();
Java.IO.File file = new Java.IO.File(myDir, fileName);
if (file.Exists())
{
file.Delete();
}
try
{
FileOutputStream outs = new FileOutputStream(file);
outs.Write(stream.ToArray());
outs.Flush();
outs.Close();
}
catch (Exception e)
{
exception = e.ToString();
}
if (file.Exists() && contentType != "application/html")
{
string extension = MimeTypeMap.GetFileExtensionFromUrl(Android.Net.Uri.FromFile(file).ToString());
string mimeType = MimeTypeMap.Singleton.GetMimeTypeFromExtension(extension);
Intent intent = new Intent(Intent.ActionView);
intent.SetFlags(ActivityFlags.ClearTop | ActivityFlags.NewTask);
Android.Net.Uri path = FileProvider.GetUriForFile(Forms.Context, Android.App.Application.Context.PackageName + ".provider", file);
intent.SetDataAndType(path, mimeType);
intent.AddFlags(ActivityFlags.GrantReadUriPermission);
switch (context)
{
case PDFOpenContext.InApp:
Forms.Context.StartActivity(intent);
break;
case PDFOpenContext.ChooseApp:
Forms.Context.StartActivity(Intent.CreateChooser(intent, "Choose App"));
break;
default:
break;
}
}
}
//Method to save document as a file and view the saved document
public async Task SaveAndView(string filename, string contentType, MemoryStream stream, PDFOpenContext context)
{
//Get the root path in iOS device.
string path = Environment.GetFolderPath(Environment.SpecialFolder.Personal);
string filePath = Path.Combine(path, filename);
//Create a file and write the stream into it.
FileStream fileStream = File.Open(filePath, FileMode.Create);
stream.Position = 0;
stream.CopyTo(fileStream);
fileStream.Flush();
fileStream.Close();
//Invoke the saved document for viewing
UIViewController currentController = UIApplication.SharedApplication.KeyWindow.RootViewController;
while (currentController.PresentedViewController != null)
{
currentController = currentController.PresentedViewController;
}
UIView currentView = currentController.View;
QLPreviewController qlPreview = new QLPreviewController();
QLPreviewItem item = new QLPreviewItemBundle(filename, filePath);
qlPreview.DataSource = new PreviewControllerDS(item);
currentController.PresentViewController(qlPreview, true, null);
}
public async Task SaveAndView(string fileName, string contentType, MemoryStream stream, PDFOpenContext context)
{
var targetFileName = $"{fileName}{fileExtension}}";
if (System.IO.Path.GetExtension(fileName).Equals(fileExtension, StringComparison.InvariantCultureIgnoreCase))
{
targetFileName = $"{System.IO.Path.GetFileNameWithoutExtension(fileName)}{fileExtension}}";
}
var file = await CreateToDownloadFolderAsync(targetFileName);
await WriteBufferToFileAsync(file, memoryStream);
switch (context)
{
case PDFOpenContext.InApp:
await LaunchInAppAsync();
break;
default:
case PDFOpenContext.ChooseApp:
await LaunchDefaultPdfAppAsync(file);
break;
}
}
public Task SaveAndView(string fileName, string contentType, MemoryStream stream, PDFOpenContext context)
{
//throw new NotImplementedException();
return(Task.CompletedTask);
}
