Using the camera in a HTML File upload control

CustomWebViewRenderer.cs

public class CustomWebViewRenderer : WebViewRenderer
{
    private static int FILECHOOSER_RESULTCODE = 1;

    protected override void OnElementChanged (ElementChangedEventArgs<WebView> e)
    {
        base.OnElementChanged (e);

        var chromeClient = new FileChooserWebChromeClient ((uploadMsg, acceptType, capture) => {
            MainActivity.UploadMessage = uploadMsg;

            // Create MyAppFolder at SD card for saving our images
            File imageStorageDir = new File (Android.OS.Environment.GetExternalStoragePublicDirectory (
                    Android.OS.Environment.DirectoryPictures), "MyAppFolder");

            if (!imageStorageDir.Exists ()) {
                imageStorageDir.Mkdirs ();
            }

            // Create camera captured image file path and name, add ticks to make it unique 
            var file = new File (imageStorageDir + File.Separator + "IMG_"
                + DateTime.Now.Ticks + ".jpg");

            MainActivity.mCapturedImageURI = Android.Net.Uri.FromFile (file);

            // Create camera capture image intent and add it to the chooser
            var captureIntent = new Intent (MediaStore.ActionImageCapture);
            captureIntent.PutExtra (MediaStore.ExtraOutput, MainActivity.mCapturedImageURI);

            var i = new Intent (Intent.ActionGetContent);
            i.AddCategory (Intent.CategoryOpenable);
            i.SetType ("image/*");

            var chooserIntent = Intent.CreateChooser (i, "Choose image");
            chooserIntent.PutExtra (Intent.ExtraInitialIntents, new Intent [] { captureIntent });

            ((Activity)Forms.Context).StartActivityForResult (chooserIntent, FILECHOOSER_RESULTCODE);
        });

        Control.SetWebChromeClient (chrome);
    }
}