Android Palette working only on some of RecyclerView items: http://stackoverflow.com/questions/37811856/android-palette-working-only-on-some-of-recyclerview-items?noredirect=1#comment63180722_37811856

RecyclerAdapter.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 Android.Widget;
using Android.Support.V7.Widget;
using Android.Animation;
using Android.Support.V4.App;
using Android.Views.Animations;
using Android.Graphics.Drawables;
using Android.Graphics;
using Android.Support.V7.Graphics;
using System.Runtime.Serialization.Formatters;

namespace ToratHamachane
{
    public class RecyclerAdapter : RecyclerView.Adapter
    {
        private List<Book> mBooks;
        private RecyclerView mRecyclerView;
        private Context mContext;
        private int mCurrentPosition = -1;
        public RecyclerAdapter(List<Book> books, RecyclerView recyclerView, Context context)
        {
            mBooks = books;
            mRecyclerView = recyclerView;
            mContext = context;
        }

        public class MyView : RecyclerView.ViewHolder
        {
            public View mMainView { get; set; }
            public TextView mTitle { get; set; }
            public ImageView mCoverImage { get; set; }
            public int mCoverImageResourceID { get; set; }
            public CardView mCard { get; set; }
            public LinearLayout TitleBackground { get; set; }

            public MyView(View view) : base(view)
            {
                mMainView = view;
            }
        }

        public override RecyclerView.ViewHolder OnCreateViewHolder(ViewGroup parent, int viewType)
        {
            View bookItem = LayoutInflater.From(parent.Context).Inflate(Resource.Layout.item_book, parent, false);

            TextView bookTitle = bookItem.FindViewById<TextView>(Resource.Id.bookTitle);
            ImageView coverImage = bookItem.FindViewById<ImageView>(Resource.Id.coverImage);
            CardView card = bookItem.FindViewById<CardView>(Resource.Id.card);
            LinearLayout bookTitleLayout = bookItem.FindViewById<LinearLayout>(Resource.Id.bookTitleLayout);

            MyView view = new MyView(bookItem) { mTitle = bookTitle, mCoverImage = coverImage, mCard = card, TitleBackground = bookTitleLayout };
            return view;
        }

        public override void OnBindViewHolder(RecyclerView.ViewHolder holder, int position)
        {
            var myHolder = holder as MyView;
            myHolder.mMainView.Click += mMainView_Click;
            myHolder.mTitle.Text = mBooks[position].Title;
            myHolder.mCoverImage.SetImageDrawable(mBooks[position].Cover.Drawable);

            if (position > mCurrentPosition)
            {
                int currentAnim = Resource.Animation.slide_left_to_right;
                mCurrentPosition = position;
            }
                       
            Palette.From(((BitmapDrawable)myHolder.mCoverImage.Drawable).Bitmap).MaximumColorCount(16).Generate(new PalleteGeneration(myHolder));

        }

        private void SetAnimation(View view, int currentAnim)
        {
            Animation anim = AnimationUtils.LoadAnimation(mContext, currentAnim);
            view.StartAnimation(anim);
        }

        void mMainView_Click(object sender, EventArgs e)
        {
            int position = mRecyclerView.GetChildLayoutPosition((View)sender);
            Console.WriteLine(mBooks[position].Title);
            Intent intent;
            
            intent = new Intent(mContext, typeof(BookReaderActivity));
            intent.PutExtra("Title", mBooks[position].Title);
            
            BitmapDrawable bitmapDrawable = ((BitmapDrawable)mBooks[position].Cover.Drawable);
            Bitmap image = bitmapDrawable.Bitmap;          
            mContext.StartActivity(intent);
        }

        public class PalleteGeneration : Java.Lang.Object, Palette.IPaletteAsyncListener
        {
            private MyView _holder;

            public PalleteGeneration(MyView holder) 
            {
                _holder = holder;
            }

            public void OnGenerated(Palette palette)
            {
                if (palette == null)
                    return;
               
                if (palette.LightVibrantSwatch != null)
                {
                    var lightVibrant = new Color(palette.LightVibrantSwatch.Rgb);
                    _holder.mCard.SetCardBackgroundColor(lightVibrant);
                   
                }
                else if (palette.LightMutedSwatch != null)
                {
                    var lightVibrant = new Color(palette.LightMutedSwatch.Rgb);
                    _holder.mCard.SetCardBackgroundColor(lightVibrant);

                }
                if (palette.DarkVibrantSwatch != null)
                {
                    var darkVibrant = new Color(palette.DarkVibrantSwatch.Rgb);
                    _holder.TitleBackground.SetBackgroundColor(darkVibrant);
                }
                else if (palette.DarkMutedSwatch != null)
                {
                    var darkVibrant = new Color(palette.DarkMutedSwatch.Rgb);
                    _holder.TitleBackground.SetBackgroundColor(darkVibrant);
                }               }
        }

        public override int ItemCount
        {
            get { return mBooks.Count; }
        }
    }
}