CustomEditText.cs

namespace <project>.Droid.Controls
{
    public class CustomEditText : FormsEditText
    {
        public CustomEditText(Context context) : base(context)
        {
        }

        protected override void OnAttachedToWindow()
        {
            base.OnAttachedToWindow();

            Enabled = false;
            Enabled = true;
        }
    }
}