public void Print(PrintDocumentAdapter printAdapter)
{
printDocumentAdapter = printAdapter;
printDocumentAdapter.OnLayout(null, printAttributes, null, new MyLayoutResultCallback(printAdapter, JNIEnv.Handle, JniHandleOwnership.DoNotRegister), null);
}
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);
}
}
public override void OnLayout(PrintAttributes oldAttributes, PrintAttributes newAttributes,
CancellationSignal cancellationSignal, LayoutResultCallback callback, Bundle extras)
{
mWrappedInstance.OnLayout(oldAttributes, newAttributes,
cancellationSignal, callback, extras);
}