EntryViewRenderer.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Linq;
using System.Text;

using Android.App;
using Android.Content;
using Android.OS;
using Android.Runtime;
using Android.Support.Design.Widget;
using Android.Support.V7.App;
using Android.Text;
using Android.Views;
using Android.Views.InputMethods;
using Android.Widget;
using MaterialTextField;
using MaterialTextField.Droid;
using Xamarin.Forms;
using Xamarin.Forms.Platform.Android;
[assembly: ExportRenderer(typeof(EntryView), typeof(EntryViewRenderer))]
namespace MaterialTextField.Droid
{
    public class EntryViewRenderer : Xamarin.Forms.Platform.Android.AppCompat.ViewRenderer<EntryView, TextInputLayout>
    {
        global::Android.Views.View view;
        EntryView entryView;
        TextInputEditText editText;
        Activity activity;

        public EntryViewRenderer(Context ctx) : base(ctx)
        {

        }
        protected override void OnElementChanged(ElementChangedEventArgs<EntryView> e)
        {
            base.OnElementChanged(e);
            if (e.NewElement != null)
            {
                entryView = e.NewElement as EntryView;
            }
            if (e.OldElement != null || Element == null)
            {
                return;
            }
            try
            {
                SetupUserInterface();
                //SetupEventHandlers();
            }
            catch (Exception ex)
            {
                System.Diagnostics.Debug.WriteLine(@"ERROR: ", ex.Message);
            }
        }



        void SetupUserInterface()
        {
            activity = this.Context as Activity;
            var layout = (TextInputLayout)LayoutInflater.From(Context).Inflate(Resource.Layout.MaterialEntryLayout, null);
            editText = layout.FindViewById<TextInputEditText>(Resource.Id.editText1);
            layout.CounterEnabled = true;
            layout.CounterMaxLength = 5;
            SetNativeControl(layout);
        }
    }
}