public void ToPng(string html, string fileName, Action <string> onComplete)
{
if (CanWriteExternalStorage())
{
var size = new Size(8.5, 11);
var externalPath = Android.OS.Environment.ExternalStorageDirectory.AbsolutePath;
var dir = new Java.IO.File(externalPath);
var file = new Java.IO.File(dir + "/" + fileName + ".png");
if (!dir.Exists())
{
dir.Mkdir();
}
if (file.Exists())
{
file.Delete();
}
var webView = new CustomWebView(Android.App.Application.Context);
webView.Settings.JavaScriptEnabled = true;
webView.DrawingCacheEnabled = true;
webView.Layout(0, 0, (int)((size.Width - 0.5) * 72), (int)((size.Height - 0.5) * 72));
webView.LoadData(html, "text/html; charset=utf-8", "UTF-8");
webView.SetWebViewClient(new WebViewCallBack(fileName, onComplete));
}
else
{
onComplete.Invoke(null);
}
}
public void OnReceiveValue(Java.Lang.Object value)
{
System.Diagnostics.Debug.WriteLine("value=[" + value + "]");
var height = Convert.ToInt32(value.ToString());
int specWidth = MeasureSpecFactory.MakeMeasureSpec(webView.ContentWidth, MeasureSpecMode.Exactly);
int specHeight = MeasureSpecFactory.MakeMeasureSpec(height + 36, MeasureSpecMode.Exactly);
webView.Measure(specWidth, specHeight);
webView.Layout(0, 0, webView.MeasuredWidth, webView.MeasuredHeight);
var bitmap = Bitmap.CreateBitmap(webView.DrawingCache);
if (!_dir.Exists())
{
_dir.Mkdir();
}
var path = _dir.Path + "/" + _fileName + ".png";
var file = new Java.IO.File(path);
if (!file.Exists())
{
file.CreateNewFile();
}
var stream = new FileStream(file.Path, FileMode.Create, System.IO.FileAccess.Write);
bitmap.Compress(Bitmap.CompressFormat.Png, 80, stream);
stream.Flush();
stream.Close();
_onComplete?.Invoke(path);
}
public void OnReceiveValue(Java.Lang.Object value)
{
System.Diagnostics.Debug.WriteLine("value=[" + value + "]");
var height = Convert.ToInt32(value.ToString());
int specWidth = MeasureSpecFactory.MakeMeasureSpec(webView.ContentWidth, MeasureSpecMode.Exactly);
int specHeight = MeasureSpecFactory.MakeMeasureSpec(height + 36, MeasureSpecMode.Exactly);
webView.Measure(specWidth, specHeight);
webView.Layout(0, 0, webView.MeasuredWidth, webView.MeasuredHeight);
System.Diagnostics.Debug.WriteLine("spec [" + specWidth + ", " + specHeight + "]");
System.Diagnostics.Debug.WriteLine("webView.Measured [" + webView.MeasuredWidth + ", " + webView.MeasuredHeight + "]");
System.Diagnostics.Debug.WriteLine("webView.Layout [" + webView.Left + ", " + webView.Top + ", " + webView.Width + ", " + webView.Height + "]");
Complete();
}