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#pragma warning disable CS0618 // Type or member is obsolete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#pragma warning restore CS0618 // Type or member is obsolete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 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#pragma warning disable CS0618 // Type or member is obsolete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#pragma warning restore CS0618 // Type or member is obsolete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));
}
}
//配置webview
private void setSettings(Android.Webkit.WebView webView)
{
androidWebView = webView;
webView.SetLayerType(Android.Views.LayerType.Hardware, new Android.Graphics.Paint());
WebSettings set = webView.Settings;
set.JavaScriptEnabled = true;
set.JavaScriptCanOpenWindowsAutomatically = true;
set.SetSupportZoom(true);
set.UseWideViewPort = true;
set.SetPluginState(PluginState.On);
set.PluginsEnabled = true;
set.AllowFileAccess = true;
set.CacheMode = CacheModes.NoCache;
set.SetLayoutAlgorithm(LayoutAlgorithm.SingleColumn);
set.LoadWithOverviewMode = true;
set.BuiltInZoomControls = true;
set.SetAppCacheEnabled(false);
set.SetGeolocationEnabled(true);
set.DomStorageEnabled = true;
set.MixedContentMode = MixedContentHandling.AlwaysAllow;
set.MediaPlaybackRequiresUserGesture = false;
}
public void ToPng(TaskCompletionSource <ToFileResult> taskCompletionSource, Xamarin.Forms.WebView xfWebView, string fileName)
{
if (Platform.CreateRendererWithContext(xfWebView, Settings.Context) is IVisualElementRenderer renderer)
{
Android.Webkit.WebView droidWebView = renderer.View as Android.Webkit.WebView;
if (droidWebView == null && renderer.View is WebViewRenderer xfWebViewRenderer)
{
droidWebView = xfWebViewRenderer.Control;
}
if (droidWebView != null)
{
//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();
}
droidWebView.SetLayerType(LayerType.Software, null);
droidWebView.Settings.JavaScriptEnabled = true;
#pragma warning disable CS0618 // Type or member is obsolete
droidWebView.DrawingCacheEnabled = true;
droidWebView.BuildDrawingCache();
#pragma warning restore CS0618 // Type or member is obsolete
droidWebView.SetWebViewClient(new WebViewCallBack(taskCompletionSource, fileName, OnPageFinished));
}
}
}
}