public MyOnWriteAsyncTask(MyPrintDocumentAdapter self, PageRange[] pages, ParcelFileDescriptor destination,
CancellationSignal cancellationSignal, WriteResultCallback callback)
{
this.self = self;
this.pages = pages;
this.destination = destination;
this.cancellationSignal = cancellationSignal;
this.callback = callback;
items = ((MotoGpStatAdapter)self.pcc.ListAdapter).CloneItems();
mPdfDocument = new PrintedPdfDocument(self.mPrintContext, self.mPrintAttributes);
}
public override void OnLayout(PrintAttributes oldAttributes, PrintAttributes newAttributes,
CancellationSignal cancellationSignal, LayoutResultCallback callback, Bundle extras)
{
document = new PrintedPdfDocument(context, newAttributes);
CalculateScale(newAttributes);
var printInfo = new PrintDocumentInfo
.Builder("pdf-test.pdf")
.SetContentType(PrintContentType.Document)
.SetPageCount(1)
.Build();
callback.OnLayoutFinished(printInfo, true);
}
public override void OnWrite(PageRange[] pages, ParcelFileDescriptor destination, CancellationSignal cancellationSignal, WriteResultCallback callback)
{
int totalPages = 1;
for (int i = 0; i < totalPages; i++)
{
if (pageInRange(pages, i))
{
PdfDocument.Page[] writtenPagesArray;
PdfDocument.Page page = mPdfDocument.StartPage(i);
if (cancellationSignal.IsCanceled)
{
callback.OnWriteCancelled();
mPdfDocument.Close();
mPdfDocument = null;
return;
}
drawPage(page);
mPdfDocument.FinishPage(page);
}
}
try
{
FileOutputStream fileOutputStream = new FileOutputStream(destination.FileDescriptor);
MemoryStream stream = new MemoryStream();
mPdfDocument.WriteTo(stream);
byte[] bytes = stream.ToArray();
stream.Close();
fileOutputStream.Write(bytes);
}
catch (Java.IO.IOException e)
{
callback.OnWriteFailed(e.ToString());
return;
}
finally
{
mPdfDocument.Close();
mPdfDocument = null;
}
callback.OnWriteFinished(pages);
}
public void GeneratePdfFile(string text)
{
PrintAttributes printAttrs = new PrintAttributes.Builder()
.SetColorMode(PrintColorMode.Color)
.SetMediaSize(PrintAttributes.MediaSize.IsoA4)
.SetResolution(new PrintAttributes.Resolution("guardianHealthId", "TestReport", 592, 842))
.SetMinMargins(PrintAttributes.Margins.NoMargins)
.Build();
// Create a document
PdfDocument document = new PrintedPdfDocument(Android.App.Application.Context, printAttrs);
// Create a page description
// A4 : Page size
// pageWidth The page width in PostScript (1/72th of an inch)
// pageHeight The page height in PostScript(1 / 72th of an inch).
PageInfo pageInfo = new PageInfo.Builder(592, 842, 1).Create();
PdfDocument.Page page = document.StartPage(pageInfo);
Xamarin.Forms.Button btn = new Xamarin.Forms.Button();
// File to create page
File path = GetDirectoryPath();
System.IO.FileStream fileStream = new System.IO.FileStream(path.ToString(), System.IO.FileMode.Create);
Canvas canvas = page.Canvas;
Paint paint = new Paint();
canvas.DrawText("This is a demo pdf file.\n" + text, 10, 10, paint);
document.FinishPage(page);
document.WriteTo(fileStream);
document.Close();
fileStream.Close();
}
public override void OnLayout(PrintAttributes oldAttributes, PrintAttributes newAttributes, CancellationSignal cancellationSignal, LayoutResultCallback callback, Bundle extras)
{
mPdfDocument = new PrintedPdfDocument(CrossPrint.appcontext, newAttributes);
if (cancellationSignal.IsCanceled)
{
callback.OnLayoutCancelled();
return;
}
int pages = computePageCount(newAttributes);
if (pages > 0)
{
PrintDocumentInfo info = new PrintDocumentInfo
.Builder("pdf.pdf")
.SetContentType(PrintContentType.Document)
.SetPageCount(pages).Build();
callback.OnLayoutFinished(info, true);
}
else
{
callback.OnLayoutFailed("Page count calculation failed.");
}
}
