async Task OnPageFinished(Android.Webkit.WebView webView, string fileName, PageSize pageSize, PageMargin margin, TaskCompletionSource <ToFileResult> taskCompletionSource)
{
if (Build.VERSION.SdkInt >= Android.OS.BuildVersionCodes.Kitkat)
{
await Task.Delay(5);
var builder = new PrintAttributes.Builder();
//builder.SetMediaSize(PrintAttributes.MediaSize.NaLetter);
builder.SetMediaSize(new PrintAttributes.MediaSize(pageSize.Name, pageSize.Name, (int)(pageSize.Width * 1000 / 72), (int)(pageSize.Height * 1000 / 72)));
builder.SetResolution(new PrintAttributes.Resolution("pdf", "pdf", 72, 72));
if (margin is null)
{
builder.SetMinMargins(PrintAttributes.Margins.NoMargins);
}
else
{
builder.SetMinMargins(new PrintAttributes.Margins((int)(margin.Left * 1000 / 72), (int)(margin.Top * 1000 / 72), (int)(margin.Right * 1000 / 72), (int)(margin.Bottom * 1000 / 72)));
}
var attributes = builder.Build();
var adapter = webView.CreatePrintDocumentAdapter(Guid.NewGuid().ToString());
var layoutResultCallback = new PdfLayoutResultCallback();
layoutResultCallback.Adapter = adapter;
layoutResultCallback.TaskCompletionSource = taskCompletionSource;
layoutResultCallback.FileName = fileName;
adapter.OnLayout(null, attributes, null, layoutResultCallback, null);
}
}
public void PrintDocument(string filePath)
{
var attr = new PrintAttributes.Builder()
.SetColorMode(PrintColorMode.Color)
.SetMediaSize(PrintAttributes.MediaSize.IsoA4)
.SetDuplexMode(DuplexMode.LongEdge)
.Build();
var jobName = Android.App.Application.Context.PackageName + ".PrintDocument";
var job = PrintManager.Print(jobName, new PrintAdapter(filePath), attr);
PrintManager.PrintJobs.Add(job);
}
public override void OnPageFinished(WebView view, string url)
{
base.OnPageFinished(view, url);
string jobName = "Document";
PrintAttributes attributes = new PrintAttributes.Builder()
.SetMediaSize(PrintAttributes.MediaSize.IsoA4)
.SetResolution(new PrintAttributes.Resolution("pdf", "pdf", 600, 600))
.SetMinMargins(PrintAttributes.Margins.NoMargins).Build();
PdfPrint pdfPrint = new PdfPrint(attributes);
pdfPrint.Print(view.CreatePrintDocumentAdapter(jobName));
}
private async void CreatePDF2(Android.Webkit.WebView webview)
{
try
{
// 计算webview打印需要的页数
int numberOfPages = await GetPDFPageCount(webview);
File pdfFile = new File(fileNameWithPath);
if (pdfFile.Exists())
{
pdfFile.Delete();
}
pdfFile.CreateNewFile();
descriptor = ParcelFileDescriptor.Open(pdfFile, ParcelFileMode.ReadWrite);
// 设置打印参数
var dm = webview.Context.Resources.DisplayMetrics;
var d = dm.Density;
var dpi = dm.DensityDpi;
var height = dm.HeightPixels;
var width = dm.WidthPixels;
var xdpi = dm.Xdpi;
var ydpi = dm.Ydpi;
PrintAttributes attributes = new PrintAttributes.Builder()
.SetMediaSize(MediaSize)
.SetResolution(new PrintAttributes.Resolution("id", Context.PrintService, Convert.ToInt16(xdpi), Convert.ToInt16(ydpi)))
.SetColorMode(PrintColorMode.Color)
.SetMinMargins(PrintAttributes.Margins.NoMargins)
.Build();
ranges = new PageRange[] { new PageRange(0, numberOfPages - 1) };
// 创建pdf文件缓存目录
// 获取需要打印的webview适配器
printAdapter = webview.CreatePrintDocumentAdapter("CreatePDF");
// 开始打印
printAdapter.OnStart();
printAdapter.OnLayout(attributes, attributes, new CancellationSignal(), GetLayoutResultCallback(this), new Bundle());
}
catch (Java.IO.FileNotFoundException e)
{
System.Console.WriteLine(e.Message);
}
catch (Java.IO.IOException e)
{
System.Console.WriteLine(e.Message);
}
catch (Java.Lang.Exception e)
{
System.Console.WriteLine(e.Message);
}
}
async Task OnPageFinished(Android.Webkit.WebView webView, string fileName, TaskCompletionSource <ToFileResult> taskCompletionSource)
{
if (Android.OS.Build.VERSION.SdkInt >= Android.OS.BuildVersionCodes.Kitkat)
{
var builder = new PrintAttributes.Builder();
builder.SetMediaSize(PrintAttributes.MediaSize.NaLetter);
builder.SetResolution(new PrintAttributes.Resolution("pdf", "pdf", 600, 600));
builder.SetMinMargins(PrintAttributes.Margins.NoMargins);
var attributes = builder.Build();
var adapter = webView.CreatePrintDocumentAdapter(Guid.NewGuid().ToString());
var layoutResultCallback = new PdfLayoutResultCallback();
layoutResultCallback.Adapter = adapter;
layoutResultCallback.TaskCompletionSource = taskCompletionSource;
layoutResultCallback.FileName = fileName;
adapter.OnLayout(null, attributes, null, layoutResultCallback, null);
}
}
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();
}
internal void OnPageLoaded(Android.Webkit.WebView webView)
{
try
{
if (Android.OS.Build.VERSION.SdkInt >= Android.OS.BuildVersionCodes.Kitkat)
{
var builder = new PrintAttributes.Builder();
builder.SetMediaSize(PrintAttributes.MediaSize.IsoA4);
builder.SetResolution(new PrintAttributes.Resolution("pdf", "pdf", (int)pDFToHtml.PageDPI, (int)pDFToHtml.PageDPI));
builder.SetMinMargins(PrintAttributes.Margins.NoMargins);
var attributes = builder.Build();
var adapter = webView.CreatePrintDocumentAdapter(pDFToHtml.FileName);
var layoutResultCallback = new PdfLayoutResultCallback();
layoutResultCallback.Adapter = adapter;
layoutResultCallback.PDFToHtml = pDFToHtml;
adapter.OnLayout(null, attributes, null, layoutResultCallback, null);
}
}
catch
{
pDFToHtml.Status = PDFEnum.Failed;
}
}
