PDFViewer Failing on Android

[Jacob Bullock]

I just implemented the PDFViewer into a Xamarin.Forms project and it worked right out of the gate for UWP.  

However I am getting an exception on Android.  The error log is attached.

I have made sure that I have the necessary packages installed for Android.I am opening a downloaded pdf that is being written to disk via the PCLStorage library.  I have verified that a document exists at the location.  And my mp3 player works with downloaded files AND the pdfs work fine in UWP.  So I am fairly certain the downloaded PDF is being streamed properly.  

I am testing on a Nexus 5 with Android 6.0 

This is the code that handles the streaming, I am just using the XAML from the example in the documentation.

public SimplePdf(String filename)

  {

      InitializeComponent();

      FileName = filename;

      LoadStream();

  }

  private async void LoadStream()

  {

      IFolder rootFolder = FileSystem.Current.LocalStorage;

      IFolder folder = await rootFolder.GetFolderAsync("Downloads");

      IFile file = await folder.GetFileAsync(FileName);

      Debug.WriteLine("file: " + file.Path);

      var filebuffer = await file.OpenAsync(FileAccess.Read);

      var mStream = new MemoryStream();

      filebuffer.CopyTo(mStream);

      Debug.WriteLine("stream: " + mStream.Length.ToString());

      pdfViewerControl.LoadDocument(mStream);

}

Attachment: pdfviewer_error.txt_1a8fd27d.zip

[Sathish Sivakumar]

Hi Jacob, 

 

Thank you for using Syncfusion products. 

 

In order to resolve the exception “Java.IO.IoException: cannot create document. Error 3” , we need to reset the memory stream position to 0 before loading it into SfPdfViewer. Please find the code snippet below which is used to resolve the exception:  

 

Code Snippet: 

 

IFolder rootFolder = FileSystem.Current.LocalStorage; 

IFolder folder = await rootFolder.GetFolderAsync("Downloads"); 

IFile file = await folder.GetFileAsync(FileName); 

 

Debug.WriteLine("file: " + file.Path); 

 

var filebuffer = await file.OpenAsync(FileAccess.Read); 

 

var mStream = new MemoryStream(); 

filebuffer.CopyTo(mStream); 

 

Debug.WriteLine("stream: " + mStream.Length.ToString()); 

mStream.Position = 0; 

pdfViewerControl.LoadDocument(mStream); 

 

 

Please get back to us with more details if you still reproducing the same issue. 

 

Regards, 

Sathish 

[Jacob Bullock]

That fixed it.  Thanks so much.

[Navaneetha Kannan Sudalai Muthu]

Hi Jacob, 

We are glad that the issue was fixed. Kindly let us know if you need any further assistance.  

Best, 

Navaneetha Kannan