XEditorRenderer.cs

using Xamarin.Forms;  
using XamarinFormsEditor.Controls;  
using XamarinFormsEditor.Droid.Helpers;  
using Xamarin.Forms.Platform.Android;  
using Android.Graphics.Drawables;  
[assembly: ExportRenderer(typeof(XEditor), typeof(XEditorRenderer))]  
namespace XamarinFormsEditor.Droid.Helpers {  
    public class XEditorRenderer: EditorRenderer {  
        protected override void OnElementChanged(ElementChangedEventArgs < Editor > e) {  
            base.OnElementChanged(e);  
            if (Control != null) {  
                Control.Background = new ColorDrawable(Android.Graphics.Color.Transparent);  
            }  
        }  
    }  
}