Print PDF file using Xamarin forms - pdf

Question

I am printing a Pdf file via print services.
I implemented some code but it's not working - it throws the exception:
java.lang.RuntimeException: Cannot print a malformed PDF file
Please check my code and let me where I am going wrong.
internal class CustomPrintDocumentAdapter : PrintDocumentAdapter
{
private string filePath;
public CustomPrintDocumentAdapter(string filePath)
{
this.filePath = filePath;
}
public override void OnLayout(PrintAttributes oldAttributes, PrintAttributes newAttributes, CancellationSignal cancellationSignal, LayoutResultCallback callback, Bundle extras)
{
if (cancellationSignal.IsCanceled)
{
callback.OnLayoutCancelled();
return;
}
callback.OnLayoutFinished(new PrintDocumentInfo.Builder(filePath)
.SetContentType(PrintContentType.Document)
.Build(), true);
}
public override void OnWrite(PageRange[] pages, ParcelFileDescriptor destination, CancellationSignal cancellationSignal, WriteResultCallback callback)
{
try
{
using (InputStream input = new FileInputStream(filePath))
{
using (OutputStream output = new FileOutputStream(destination.FileDescriptor))
{
var buf = new byte[1024];
int bytesRead;
while ((bytesRead = input.Read(buf)) > 0)
{
output.Write(buf, 0, bytesRead);
}
}
}
callback.OnWriteFinished(new[] { PageRange.AllPages });
}
catch (FileNotFoundException fileNotFoundException)
{
System.Diagnostics.Debug.WriteLine(fileNotFoundException);
}
catch (Exception exception)
{
System.Diagnostics.Debug.WriteLine(exception);
}
}
}