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 override void OnPageFinished(Android.Webkit.WebView webView, string url)
{
base.OnPageFinished(webView, url);
var printManager = (PrintManager)webView.Context.GetSystemService(Context.PrintService);
string jobName = webView.Context.PackageName + ".PrintHtml";
PrintDocumentAdapter printAdapter = webView.CreatePrintDocumentAdapter(jobName);
Android.Print.PrintJob printJob = printManager.Print(jobName, printAdapter, new PrintAttributes.Builder().Build());
printManager.PrintJobs.Add(printJob);
}
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);
}
}
protected void OnElementChanged(Android.Webkit.WebView webView)
{
try
{
Device.BeginInvokeOnMainThread(() =>
{
var printManager = (PrintManager)Forms.Context.GetSystemService(Context.PrintService);
PrintDocumentAdapter printAdapter = webView.CreatePrintDocumentAdapter("IDCARD");
PrintJob printJob = printManager.Print("IDCARD", printAdapter, new PrintAttributes.Builder().Build());
// Save the job object for later status checking
mPrintJobs.Add(printJob);
});
}
catch (Exception)
{
throw;
}
}
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);
}
}
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;
}
}
