Removes the material ripple effect on the Xamarin.Forms Android ListView.

no_selector.axml

<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
  <item android:state_window_focused="false" android:drawable="@android:color/transparent"/>
</selector>

NoRippleListViewRenderer.cs

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

using Android.App;
using Android.Content;
using Android.OS;
using Android.Runtime;
using Android.Views;
using YourProject.Droid.CustomRenderers;
using Xamarin.Forms;
using Xamarin.Forms.Platform.Android;

[assembly: ExportRenderer (typeof(ListView), typeof(NoRippleListViewRenderer))]
namespace YourProject.Droid.CustomRenderers
{
    public class NoRippleListViewRenderer : ListViewRenderer
    {
        protected override void OnElementChanged(ElementChangedEventArgs<ListView> e)
        {
            base.OnElementChanged(e);
            Control.SetSelector(Resource.Layout.no_selector);
        }
    }
}