public void ToPdf(TaskCompletionSource <ToFileResult> taskCompletionSource, string html, string fileName, PageSize pageSize, PageMargin margin)
{
var externalPath = Android.OS.Environment.ExternalStorageDirectory.AbsolutePath;
using (var dir = new Java.IO.File(externalPath))
using (var file = new Java.IO.File(dir + "/" + fileName + ".pdf"))
{
if (!dir.Exists())
{
dir.Mkdir();
}
if (file.Exists())
{
file.Delete();
}
var webView = new Android.Webkit.WebView(Android.App.Application.Context);
webView.Settings.JavaScriptEnabled = true;
#pragma warning disable CS0618 // Type or member is obsolete
webView.DrawingCacheEnabled = true;
#pragma warning restore CS0618 // Type or member is obsolete
webView.SetLayerType(LayerType.Software, null);
//webView.Layout(0, 0, (int)((size.Width - 0.5) * 72), (int)((size.Height - 0.5) * 72));
webView.Layout(0, 0, (int)System.Math.Ceiling(pageSize.Width), (int)System.Math.Ceiling(pageSize.Height));
webView.LoadData(html, "text/html; charset=utf-8", "UTF-8");
webView.SetWebViewClient(new WebViewCallBack(taskCompletionSource, fileName, pageSize, margin, OnPageFinished));
}
}
public void ToPng(TaskCompletionSource <ToFileResult> taskCompletionSource, string html, string fileName, int width)
{
//var size = new Size(8.5, 11);
//var externalPath = Android.OS.Environment.ExternalStorageDirectory.AbsolutePath;
//using (var dir = new Java.IO.File(externalPath))
//using (var file = new Java.IO.File(dir + "/" + fileName + ".png"))
//{
// if (!dir.Exists())
// dir.Mkdir();
// if (file.Exists())
// file.Delete();
var webView = new Android.Webkit.WebView(Android.App.Application.Context);
webView.Settings.JavaScriptEnabled = true;
#pragma warning disable CS0618 // Type or member is obsolete
webView.DrawingCacheEnabled = true;
#pragma warning restore CS0618 // Type or member is obsolete
webView.SetLayerType(LayerType.Software, null);
//webView.Layout(0, 0, (int)((size.Width - 0.5) * 72), (int)((size.Height - 0.5) * 72));
webView.Layout(0, 0, width, width);
webView.SetWebViewClient(new WebViewCallBack(taskCompletionSource, fileName, new PageSize {
Width = width
}, null, OnPageFinished));
webView.LoadData(html, "text/html; charset=utf-8", "UTF-8");
//}
}
public async Task <string> ConvertHtmlToPDF(string html, string fileName)
{
var dir = new Java.IO.File(Android.OS.Environment.ExternalStorageDirectory.AbsolutePath + "/Download/");
var file = new Java.IO.File(dir + "/" + fileName + ".pdf");
if (!dir.Exists())
{
dir.Mkdirs();
}
int x = 0;
while (file.Exists())
{
x++;
file = new Java.IO.File(dir + "/" + fileName + "(" + x + ")" + ".pdf");
}
var webpage = new Android.Webkit.WebView(MainActivity.Instance);
//var windowManager = MainActivity.Instance.GetSystemService(Android.Content.Context.WindowService);
//DisplayMetrics outMetrics = new DisplayMetrics();
//windowManager.DefaultDisplay.GetMetrics(outMetrics);
//int widthPixels = outMetrics.WidthPixels;
//int heightPixels = outMetrics.HeightPixels;
//int width = widthPixels;
//int height = heightPixels;
int width = 2102;
int height = 2937;
webpage.Layout(0, 0, width, height);
var client = new WebViewCallBack(file.ToString());
var tokenSource = new CancellationTokenSource();
var task = Task.Run(() =>
{
if (tokenSource.Token.IsCancellationRequested)
{
return;
}
while (true)
{
if (tokenSource.Token.IsCancellationRequested)
{
break;
}
}
}, tokenSource.Token);
client.OnPageLoadFinished += (s, e) =>
{
tokenSource.Cancel();
};
webpage.SetWebViewClient(client);
webpage.LoadDataWithBaseURL("", html, "text/html", "UTF-8", null);
await task;
return(file.ToString());
}
async Task OnPageFinished(Android.Webkit.WebView view, string fileName, PageSize pageSize, PageMargin margin, TaskCompletionSource <ToFileResult> taskCompletionSource)
{
/*
* var widthString = await view.EvaluateJavaScriptAsync("document.documentElement.offsetWidth");
* var width = (int)System.Math.Ceiling(double.Parse(widthString.ToString()));
*
* var heightString = await view.EvaluateJavaScriptAsync("document.documentElement.offsetHeight");
* var height = (int)System.Math.Ceiling(double.Parse(heightString.ToString()));
* var contentHeight = view.ContentHeight;
*/
//var imageView = new WebViewImage(view, fileName, taskCompletionSource);
int specWidth = MeasureSpecFactory.MakeMeasureSpec((int)(pageSize.Width), MeasureSpecMode.Exactly);
int specHeight = MeasureSpecFactory.MakeMeasureSpec(0, MeasureSpecMode.Unspecified);
view.Measure(specWidth, specHeight);
var height = view.ContentHeight;
view.Layout(0, 0, view.MeasuredWidth, height);
//imageView.Layout(0, 0, width, height);
if (height < 1)
{
var heightString = await view.EvaluateJavaScriptAsync("document.documentElement.offsetHeight");
height = (int)System.Math.Ceiling(double.Parse(heightString.ToString()));
}
var width = view.MeasuredWidth;
if (width < 1)
{
var widthString = await view.EvaluateJavaScriptAsync("document.documentElement.offsetWidth");
width = (int)System.Math.Ceiling(double.Parse(widthString.ToString()));
}
if (height < 1 || width < 1)
{
taskCompletionSource.SetResult(new ToFileResult(true, "WebView width or height is zero."));
return;
}
await Task.Delay(50);
//using (var _dir = Android.OS.Environment.GetExternalStoragePublicDirectory(Android.OS.Environment.DirectoryDocuments))
//using (var _dir = Android.OS.Environment.GetExternalStoragePublicDirectory(Android.OS.Environment.DirectoryDownloads))
using (var _dir = Forms9Patch.Droid.Settings.Context.GetExternalFilesDir(Android.OS.Environment.DirectoryDownloads))
{
if (!_dir.Exists())
{
_dir.Mkdir();
}
//var path = _dir.Path + "/" + fileName + ".png";
//var path = System.IO.Path.Combine(_dir.AbsolutePath, Android.OS.Environment.DirectoryDownloads, fileName + ".png");
//var file = new Java.IO.File(path);
var file = new Java.IO.File(_dir, fileName + ".png");
int iter = 0;
while (file.Exists())
{
file.Dispose();
iter++;
//path = System.IO.Path.Combine(_dir.AbsolutePath, Android.OS.Environment.DirectoryDownloads, fileName + "_" + iter.ToString("D4") + ".png");
//file = new Java.IO.File(path);
file = new Java.IO.File(_dir, fileName + "_" + iter.ToString("D4") + ".png");
}
//file.CreateNewFile();
file = Java.IO.File.CreateTempFile(fileName + "_" + iter.ToString("D4"), "png", _dir);
var path = file.AbsolutePath;
using (var stream = new FileStream(file.Path, FileMode.Create, System.IO.FileAccess.Write))
{
if (Android.OS.Build.VERSION.SdkInt >= Android.OS.BuildVersionCodes.Honeycomb)
{
await Task.Delay(1000);
//using (var bitmap = Bitmap.CreateBitmap(System.Math.Max(view.MeasuredWidth, view.ContentWidth()), view.MeasuredHeight, Bitmap.Config.Argb8888))
using (var bitmap = Bitmap.CreateBitmap(view.MeasuredWidth, height, Bitmap.Config.Argb8888))
{
using (var canvas = new Canvas(bitmap))
{
if (view.Background != null)
{
view.Background.Draw(canvas);
}
else
{
canvas.DrawColor(Android.Graphics.Color.White);
}
view.SetClipChildren(false);
view.SetClipToPadding(false);
view.SetClipToOutline(false);
await Task.Delay(50);
view.Draw(canvas);
await Task.Delay(50);
bitmap.Compress(Bitmap.CompressFormat.Png, 80, stream);
}
}
}
else
{
await Task.Delay(1000);
#pragma warning disable CS0618 // Type or member is obsolete
using (var bitmap = Bitmap.CreateBitmap(view.DrawingCache))
#pragma warning restore CS0618 // Type or member is obsolete
{
bitmap.Compress(Bitmap.CompressFormat.Png, 80, stream);
}
}
stream.Flush();
stream.Close();
/*
* if (Android.OS.Build.VERSION.SdkInt >= Android.OS.BuildVersionCodes.Q)
* {
* // You can add more columns.. Complete list of columns can be found at
* // https://developer.android.com/reference/android/provider/MediaStore.Downloads
* var contentValues = new ContentValues();
* contentValues.Put(Android.Provider.MediaStore.DownloadColumns.Title, System.IO.Path.GetFileName(path));
* contentValues.Put(Android.Provider.MediaStore.DownloadColumns.DisplayName, System.IO.Path.GetFileName(path));
* contentValues.Put(Android.Provider.MediaStore.DownloadColumns.MimeType, "image/png");
* contentValues.Put(Android.Provider.MediaStore.DownloadColumns.Size, File.ReadAllBytes(path).Length);
*
* // If you downloaded to a specific folder inside "Downloads" folder
* //contentValues.Put(Android.Provider.MediaStore.DownloadColumns.RelativePath, Android.OS.Environment.DirectoryDownloads + File.separator + "Temp");
*
* // Insert into the database
* ContentResolver database = Forms9Patch.Droid.Settings.Context.ContentResolver; // getContentResolver();
* database.Insert(Android.Provider.MediaStore.Downloads.ExternalContentUri, contentValues);
* }
* else
* {
* // notify download manager!
* var downloadManager = Android.App.DownloadManager.FromContext(Android.App.Application.Context);
#pragma warning disable CS0618 // Type or member is obsolete
* downloadManager.AddCompletedDownload(
* System.IO.Path.GetFileName(path),
* System.IO.Path.GetFileName(path),
* true, "image/png", path,
* File.ReadAllBytes(path).Length, true);
#pragma warning restore CS0618 // Type or member is obsolete
* }
*/
taskCompletionSource.SetResult(new ToFileResult(false, path));
view.Dispose();
}
file.Dispose();
}
}
async Task OnPageFinished(Android.Webkit.WebView view, string fileName, TaskCompletionSource <ToFileResult> taskCompletionSource)
{
var widthString = await view.EvaluateJavaScriptAsync("document.documentElement.offsetWidth");
var width = double.Parse(widthString.ToString());
var heightString = await view.EvaluateJavaScriptAsync("document.documentElement.offsetHeight");
var height = double.Parse(heightString.ToString());
int specWidth = MeasureSpecFactory.MakeMeasureSpec((int)(width * Display.Scale), MeasureSpecMode.Exactly);
int specHeight = MeasureSpecFactory.MakeMeasureSpec((int)(height * Display.Scale), MeasureSpecMode.Exactly);
view.Measure(specWidth, specHeight);
view.Layout(0, 0, view.MeasuredWidth, view.MeasuredHeight);
await Task.Delay(50);
using (var _dir = Android.OS.Environment.GetExternalStoragePublicDirectory(Android.OS.Environment.DirectoryDocuments))
{
if (!_dir.Exists())
{
_dir.Mkdir();
}
var path = _dir.Path + "/" + fileName + ".png";
using (var file = new Java.IO.File(path))
{
if (!file.Exists())
{
file.CreateNewFile();
}
using (var stream = new FileStream(file.Path, FileMode.Create, System.IO.FileAccess.Write))
{
if (Android.OS.Build.VERSION.SdkInt >= Android.OS.BuildVersionCodes.Honeycomb)
{
await Task.Delay(1000);
using (var bitmap = Bitmap.CreateBitmap(System.Math.Max(view.MeasuredWidth, view.ContentWidth()), view.MeasuredHeight, Bitmap.Config.Argb8888))
{
using (var canvas = new Canvas(bitmap))
{
if (view.Background != null)
{
view.Background.Draw(canvas);
}
else
{
canvas.DrawColor(Android.Graphics.Color.White);
}
view.SetClipChildren(false);
view.SetClipToPadding(false);
view.SetClipToOutline(false);
await Task.Delay(50);
view.Draw(canvas);
await Task.Delay(50);
bitmap.Compress(Bitmap.CompressFormat.Png, 80, stream);
}
}
}
else
{
await Task.Delay(1000);
#pragma warning disable CS0618 // Type or member is obsolete
using (var bitmap = Bitmap.CreateBitmap(view.DrawingCache))
#pragma warning restore CS0618 // Type or member is obsolete
{
bitmap.Compress(Bitmap.CompressFormat.Png, 80, stream);
}
}
stream.Flush();
stream.Close();
taskCompletionSource.SetResult(new ToFileResult(false, path));
view.Dispose();
}
}
}
}
async Task OnPageFinished(Android.Webkit.WebView view, string fileName, PageSize pageSize, PageMargin margin, TaskCompletionSource <ToFileResult> taskCompletionSource)
{
/*
* var widthString = await view.EvaluateJavaScriptAsync("document.documentElement.offsetWidth");
* var width = (int)System.Math.Ceiling(double.Parse(widthString.ToString()));
*
* var heightString = await view.EvaluateJavaScriptAsync("document.documentElement.offsetHeight");
* var height = (int)System.Math.Ceiling(double.Parse(heightString.ToString()));
* var contentHeight = view.ContentHeight;
*/
//var imageView = new WebViewImage(view, fileName, taskCompletionSource);
int specWidth = MeasureSpecFactory.MakeMeasureSpec((int)(pageSize.Width), MeasureSpecMode.Exactly);
int specHeight = MeasureSpecFactory.MakeMeasureSpec(0, MeasureSpecMode.Unspecified);
view.Measure(specWidth, specHeight);
var height = view.ContentHeight;
view.Layout(0, 0, view.MeasuredWidth, height);
//imageView.Layout(0, 0, width, height);
if (height < 1 || view.MeasuredWidth < 1)
{
taskCompletionSource.SetResult(new ToFileResult(true, "WebView width or height is zero."));
return;
}
await Task.Delay(50);
//using (var _dir = Android.OS.Environment.GetExternalStoragePublicDirectory(Android.OS.Environment.DirectoryDocuments))
using (var _dir = Android.OS.Environment.GetExternalStoragePublicDirectory(Android.OS.Environment.DirectoryDownloads))
{
if (!_dir.Exists())
{
_dir.Mkdir();
}
//var path = _dir.Path + "/" + fileName + ".png";
var path = System.IO.Path.Combine(Android.OS.Environment.ExternalStorageDirectory.AbsolutePath, Android.OS.Environment.DirectoryDownloads, fileName + ".png");
var file = new Java.IO.File(path);
int iter = 0;
while (file.Exists())
{
file.Dispose();
iter++;
path = System.IO.Path.Combine(Android.OS.Environment.ExternalStorageDirectory.AbsolutePath, Android.OS.Environment.DirectoryDownloads, fileName + "_" + iter.ToString("D3") + ".png");
file = new Java.IO.File(path);
}
file.CreateNewFile();
using (var stream = new FileStream(file.Path, FileMode.Create, System.IO.FileAccess.Write))
{
if (Android.OS.Build.VERSION.SdkInt >= Android.OS.BuildVersionCodes.Honeycomb)
{
await Task.Delay(1000);
//using (var bitmap = Bitmap.CreateBitmap(System.Math.Max(view.MeasuredWidth, view.ContentWidth()), view.MeasuredHeight, Bitmap.Config.Argb8888))
using (var bitmap = Bitmap.CreateBitmap(view.MeasuredWidth, height, Bitmap.Config.Argb8888))
{
using (var canvas = new Canvas(bitmap))
{
if (view.Background != null)
{
view.Background.Draw(canvas);
}
else
{
canvas.DrawColor(Android.Graphics.Color.White);
}
view.SetClipChildren(false);
view.SetClipToPadding(false);
view.SetClipToOutline(false);
await Task.Delay(50);
view.Draw(canvas);
await Task.Delay(50);
bitmap.Compress(Bitmap.CompressFormat.Png, 80, stream);
}
}
}
else
{
await Task.Delay(1000);
#pragma warning disable CS0618 // Type or member is obsolete
using (var bitmap = Bitmap.CreateBitmap(view.DrawingCache))
#pragma warning restore CS0618 // Type or member is obsolete
{
bitmap.Compress(Bitmap.CompressFormat.Png, 80, stream);
}
}
stream.Flush();
stream.Close();
// notify download manager!
var downloadManager = Android.App.DownloadManager.FromContext(Android.App.Application.Context);
downloadManager.AddCompletedDownload(
System.IO.Path.GetFileName(path),
System.IO.Path.GetFileName(path),
true, "image/png", path,
File.ReadAllBytes(path).Length, true);
taskCompletionSource.SetResult(new ToFileResult(false, path));
view.Dispose();
}
file.Dispose();
}
}
