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);
}
}
/*
* private void RequestPermission(Android.App.Activity context)
* {
* var hasPermission = (Android.Support.V4.Content.ContextCompat.CheckSelfPermission(context, Android.Manifest.Permission.WriteExternalStorage) == Android.Content.PM.Permission.Granted);
* if (!hasPermission)
* {
* Android.Support.V4.App.ActivityCompat.RequestPermissions(context,
* new string[] { Android.Manifest.Permission.WriteExternalStorage },
* 007);// REQUEST_WRITE_STORAGE);
* }
* else
* {
* // You are allowed to write external storage:
* var path = Android.OS.Environment.ExternalStorageDirectory.AbsolutePath + "/new_folder";
* var storageDir = new Java.IO.File(path);
* if (!storageDir.Exists() && !storageDir.Mkdirs())
* {
* // This should never happen - log handled exception!
* }
* }
* }
*/
public override void OnPageFinished(Android.Webkit.WebView view, string url)
{
webView = view as CustomWebView;
webView.EvaluateJavascript("Math.max( document.body.scrollHeight, document.body.offsetHeight)", this);
}