public static PrintJob PrintHTML(Activity BaseActivity, string HTMLContent, string DocName = "")
{
try
{
// Create a WebView object specifically for printing
WebView webView = new WebView(BaseActivity);
webView.SetWebViewClient(new WebViewClient());
// Generate an HTML document on the fly:
webView.LoadDataWithBaseURL(null, HTMLContent, "text/HTML", "UTF-8", null);
String htmlDocument = HTMLContent;
// Get a print adapter instance
PrintDocumentAdapter printDocumentAdapter = webView.CreatePrintDocumentAdapter(DocName);
// Get a PrintManager instance
PrintManager printManager = (PrintManager)BaseActivity.GetSystemService(Context.PrintService);
// Keep a reference to WebView object until you pass the PrintDocumentAdapter to the PrintManager
PrintJob printJob = printManager.Print(DocName, printDocumentAdapter, new PrintAttributes.Builder().Build());
return(printJob);
}
catch (Exception Ex)
{
WriteErrorLog(Ex);
return(null);
}
}
public void Print(PrintDocumentAdapter printAdapter)
{
printDocumentAdapter = printAdapter;
printDocumentAdapter.OnLayout(null, printAttributes, null, new MyLayoutResultCallback(printAdapter, JNIEnv.Handle, JniHandleOwnership.DoNotRegister), null);
}
public PrintLayoutCallback(
string pdfFileName,
PrintDocumentAdapter printDocumentAdapter,
Action <string> printFinished)
{
this.pdfFileName = pdfFileName;
this.printDocumentAdapter = printDocumentAdapter;
this.printFinished = printFinished;
}
static void createWebPrintJob(WebView webView)
{
PrintManager printManager = (PrintManager)appcontext.GetSystemService(Context.PrintService);
String jobName = " Document";
PrintDocumentAdapter printAdapter = webView.CreatePrintDocumentAdapter(jobName);
PrintJob printJob = printManager.Print(jobName, printAdapter, new PrintAttributes.Builder().Build());
printAdapter.OnStart();
//printJobs.add(printJob);
}
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);
}
}
public void Print(WebView viewToPrint)
{
var renderer = Platform.CreateRenderer(viewToPrint);
var webView = renderer.ViewGroup.GetChildAt(0) as DroidWebView;
if (webView != null)
{
var version = Build.VERSION.SdkInt;
if (version >= BuildVersionCodes.Kitkat)
{
PrintDocumentAdapter documentAdapter = webView.CreatePrintDocumentAdapter();
var printMgr = (PrintManager)Forms.Context.GetSystemService(Context.PrintService);
printMgr.Print("Forms-EZ-Print", documentAdapter, null);
}
}
}
/// <summary>
/// Creates the web print job.
/// </summary>
/// <param name="webView">The web view to print.</param>
private void CreateWebPrintJob(WebView webView)
{
// Create the printing resources
PrintManager printManager = (PrintManager)activity.GetSystemService(Context.PrintService);
if (printManager != null)
{
// Create the print job with the name and adapter
string jobName = activity.GetString(Resource.String.print_name);
PrintDocumentAdapter printAdapter = webView.CreatePrintDocumentAdapter(jobName);
printManager.Print(jobName, printAdapter, null);
}
else
{
Toast.MakeText(activity, Resource.String.print_failure, ToastLength.Long).Show();
}
}
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;
}
}
void PrintPage()
{
// Ensure google cloud print is installed, or direct users to the google play store
if (CloudPrintInstalled())
{
// Get the print manager.
PrintManager printManager = (PrintManager)GetSystemService(Context.PrintService);
// Pass in the WebView's document adapter.
PrintDocumentAdapter printDocumentAdapter = webView.CreatePrintDocumentAdapter();
printManager.Print("MyWebPage", printDocumentAdapter, null);
}
else
{
var uri = Android.Net.Uri.Parse("market://details?id=com.google.android.apps.cloudprint");
Intent storeIntent = new Intent(Intent.ActionView, uri);
StartActivity(storeIntent);
}
}
/// <summary>
/// Creates the web print job.
/// </summary>
/// <param name="webView">The web view to print.</param>
private void CreateWebPrintJob(WebView webView)
{
// Create the printing resources
PrintManager printManager = (PrintManager)Xamarin.Forms.Forms.Context.GetSystemService(Context.PrintService);
if (printManager == null)
{
Toast.MakeText(Application.Context, Resource.String.print_failure, ToastLength.Long).Show();
return;
}
try
{
// Create the print job with the name and adapter
PrintDocumentAdapter printAdapter = webView.CreatePrintDocumentAdapter(Application.Context.GetString(Resource.String.print_name));
printManager.Print(Application.Context.GetString(Resource.String.print_name), printAdapter, null);
}
catch (Exception ex)
{
Toast.MakeText(Application.Context, ex.Message, ToastLength.Long).Show();
}
}
public MyPrintDocumentAdapter(PrintHtmlOffScreen self)
{
this.self = self;
mWrappedInstance = self.mWebView.CreatePrintDocumentAdapter();
}
public PrintDocumentAdapterWrapper(PrintDocumentAdapter adapter, Action completed) : base()
{
this.adapter = adapter;
this.completed = completed;
}
public MyLayoutResultCallback(PrintDocumentAdapter printDocumentAdapter, IntPtr javaReference, JniHandleOwnership transfer) : base(javaReference, transfer)
{
this.printDocumentAdapter = printDocumentAdapter;
}
