WebView - URL mechanism is broken - passing parameters does not work. http://code.google.com/p/android/issues/detail?id=17535#c100

AssetIncludeWorkaround.cs

using System;

using System.IO;
using Android.App;
using Android.Content;
using Android.Content.Res;
using Android.OS;
using Android.Runtime;
using Android.Views;
using Android.Webkit;
using Android.Widget;

namespace WebViewTest
{
	class AssetIncludeWorkaround:WebViewClient
	{
		Context context;

		public AssetIncludeWorkaround (Context context)
		{
			this.context = context;
		}

		public override WebResourceResponse ShouldInterceptRequest (WebView view, string url)
		{
			var stream = InputStreamForAndroidResource (url);
			if (stream != null) {
				return new WebResourceResponse (null, null, stream);
			}

			return base.ShouldInterceptRequest (view, url);
		}

		Stream InputStreamForAndroidResource (string url)
		{
			const string AndroidAsset = "file:///android_asset";
			if (url.Contains (AndroidAsset)) {
				url = url.Replace (AndroidAsset, string.Empty);
				
				try {
					var assetManager = context.Assets;
					Android.Net.Uri uri = Android.Net.Uri.Parse(url);
					var fileName = Path.GetFileName(uri.Path);
					var stream =  assetManager.Open (fileName, Access.Streaming);
					return stream;
				} catch (Exception ex) {
					
				}
			}
			
			return null;
		}
	}

}