/// <summary>
/// Note: Not stable.
/// </summary>
/// <param name="webview"></param>
private async void CreatePDF1(Android.Webkit.WebView webview)
{
//var pageCount = await GetPDFPageCount(webview);
PdfDocument document = new PdfDocument();
PdfDocument.Page page = document.StartPage(new PdfDocument.PageInfo.Builder(2120, 3000, 1).Create());
await Task.Delay(34);
webview.Draw(page.Canvas);
document.FinishPage(page);
Stream filestream = null;
FileOutputStream fos = null;
try
{
filestream = new MemoryStream();
fos = new Java.IO.FileOutputStream(fileNameWithPath, false);
document.WriteTo(filestream);
fos.Write(((MemoryStream)filestream).ToArray(), 0, (int)filestream.Length);
}
catch (Java.Lang.Exception e)
{
System.Console.WriteLine(e.Message);
}
finally
{
filestream?.Close();
fos?.Close();
}
document.Close();
OnPageLoadFinished?.Invoke(this, new EventArgs());
}
public override void LoadingFinished(UIWebView webView)
{
double height, width;
int header, sidespace;
width = 595.2;
height = 841.8;
header = 10;
sidespace = 10;
UIEdgeInsets pageMargins = new UIEdgeInsets(header, sidespace, header, sidespace);
webView.ViewPrintFormatter.ContentInsets = pageMargins;
UIPrintPageRenderer renderer = new UIPrintPageRenderer();
renderer.AddPrintFormatter(webView.ViewPrintFormatter, 0);
CGSize pageSize = new CGSize(width, height);
CGRect printableRect = new CGRect(sidespace,
header,
pageSize.Width - (sidespace * 2),
pageSize.Height - (header * 2));
CGRect paperRect = new CGRect(0, 0, width, height);
renderer.SetValueForKey(NSValue.FromObject(paperRect), (NSString)"paperRect");
renderer.SetValueForKey(NSValue.FromObject(printableRect), (NSString)"printableRect");
NSData file = PrintToPDFWithRenderer(renderer, paperRect);
File.WriteAllBytes(filename, file.ToArray());
OnPageLoadFinished?.Invoke(this, new EventArgs());
}
public Java.Lang.Object Invoke(Java.Lang.Object proxy, Method method, Java.Lang.Object[] args)
{
if (method.Name.Equals("onLayoutFinished"))
{
// 监听到内部调用了onLayoutFinished()方法,即打印成功
onLayoutSuccess();
}
else if (method.Name.Equals("onWriteFinished"))
{
OnPageLoadFinished?.Invoke(this, new EventArgs());
}
else
{
// 监听到打印失败或者取消了打印
}
return(null);
}
