java.io.IOException: cannot create document. Error: 3

[yehyatt]

When I download the sample and try to run it this is the error I get :

ClassLoader referenced unknown path: /data/app/com.example.android.pdfrendererbasic-1/lib/arm
java.io.IOException: cannot create document. Error: 3

    mPdfRenderer = new PdfRenderer(mFileDescriptor);

mPdfRenderer is always null

[vijaypwr61]

Same here

[Mowahed]

anyone found the answer for this yet ?

[vijaypwr61]

I'm using this nugget package => Xamarin.PdfView.Android.1.0.4

and I found code for Displaying pdf files instead using above [PdfRendere].

`using Com.Joanzapata.Pdfview;

namespace Physics
{
[Activity(Label = "Physics",Theme ="@style/MyTheme", ConfigurationChanges = ConfigChanges.ScreenSize | ConfigChanges.Orientation)]

public class PdfPageViewer : Activity
{
    private PDFView PdfPageView;

    protected override void OnCreate(Bundle savedInstanceState)
    {


        base.OnCreate(savedInstanceState);
        Window.AddFlags(Android.Views.WindowManagerFlags.Fullscreen);
        Window.RequestFeature(Android.Views.WindowFeatures.NoTitle);

        SetContentView(Resource.Layout.PdfViewerPageLayout);

        string FilePath2 = Intent.GetStringExtra("FilePath2");
        string FilePath3 = Intent.GetStringExtra("FilePath3");

        PdfPageView = FindViewById<PDFView>(Resource.Id.PdfPageView);
        if (!string.IsNullOrEmpty(FilePath2))
        {
            PdfPageView.FromAsset(FilePath2+ ".pdf").Load();
        }
        else
        {
            PdfPageView.FromAsset(FilePath3+".pdf").Load();
        }

    }

}

}`

[sdbrannum]

You need to make sure the file is in the cache as the PdfRenderer can't handle the compressed file directly.
You accomplish this by:

try {
    String FILENAME = "WhateverFileYoureLookingFor.pdf";
    FileInputStream input;
    FileOutputStream output;
    final byte[] buffer = new byte[1024];
    int size;
	
    // Create file object to read and write on
    File file = new File(context.getCacheDir(), FILENAME);
	
    // check if this object exists in the cache already
    if (!file.exists()) {        

        // external directory, documents, download respectively
        // input = new FileInputStream(new File(Environment.getExternalStorageDirectory() + "/" + FILENAME));
	// input = new FileInputStream(new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOCUMENTS) + "/" + FILENAME));
		
        input = new FileInputStream(new File(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS) + "/" + FILENAME));
        output = new FileOutputStream(file);

	// read and write into the cache directory	
        while ((size = input.read(buffer)) != -1) {
            output.write(buffer, 0, size);
        }

	// close the streams
	input.close();
        output.close();
		
        mFileDescriptor = ParcelFileDescriptor.open(file, ParcelFileDescriptor.MODE_READ_ONLY);
        mPdfRenderer = new PdfRenderer(mFileDescriptor);
    }

} catch (IllegalStateException | IOException | NullPointerException e) {
    e.printStackTrace();
}

For testing sake you may want to clear your cache out at the start of this try every time. You can see how to do that in this stackoverflow question.

[telyo]

my problem is
`
//if file.length ==0 while throw this exception : java.io.IOException: cannot create document. Error: 3 //so best to check yours
mFileDescriptor = ParcelFileDescriptor.open(file, ParcelFileDescriptor.MODE_READ_ONLY);
mPdfRenderer = new PdfRenderer(mFileDescriptor);

`

[codingjeremy]

I am closing this issue/PR, as it has been migrated to the new repo linked above in the comments. Thank you!