sample of RecycledViewPool

activity_paper.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <android.support.v4.view.ViewPager
        android:id="@+id/pager"
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <android.support.v4.view.PagerTitleStrip
            android:id="@+id/tabs"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"/>

    </android.support.v4.view.ViewPager>
</LinearLayout>

PagerActivity.java

public class PagerActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_paper);
        ViewPager pager = (ViewPager) findViewById(R.id.pager);
        pager.setAdapter(new PageAdapter(getSupportFragmentManager()));
    }

    static class PageAdapter extends FragmentPagerAdapter{
        RecyclerView.RecycledViewPool mPool = new RecyclerView.RecycledViewPool(){
            @Override
            public RecyclerView.ViewHolder getRecycledView(int viewType) {
                RecyclerView.ViewHolder scrap = super.getRecycledView(viewType);
                Log.i("@@@", "get holder from pool: "+scrap );
                return scrap;
            }

            @Override
            public void putRecycledView(RecyclerView.ViewHolder scrap) {
                super.putRecycledView(scrap);
                Log.i("@@@", "put holder to pool: " + scrap);
            }

            @Override
            public String toString() {
                return "ViewPool in adapter@"+Integer.toHexString(hashCode());
            }
        };
        public PageAdapter(FragmentManager fm) {
            super(fm);
        }

        @Override
        public Fragment getItem(int i) {
            RecyclerViewFragment f = new RecyclerViewFragment();
            f.mPool = mPool;
            return f;
        }

        @Override
        public int getCount() {
            return 10;
        }

        @Override
        public CharSequence getPageTitle(int position) {
            return "pos:"+position;
        }
    }

    public static class RecyclerViewFragment extends Fragment{
        RecyclerView.RecycledViewPool mPool;
        @Nullable
        @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
            RecyclerView view = new RecyclerView(inflater.getContext());
            LinearLayoutManager layout = new LinearLayoutManager(inflater.getContext());
            layout.setRecycleChildrenOnDetach(true);
            view.setLayoutManager(layout);
            if (mPool != null) {
                view.setRecycledViewPool(mPool);
                Log.i("@@@", "using view pool :" + mPool);
            }
            view.setAdapter(new DemoAdapter());
            view.setItemViewCacheSize(10);
            return view;
        }
    }

    static class DemoAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
        String[] mTexts;
        DemoAdapter(){
            int count = new Random().nextInt(60);
            mTexts = new String[count];
            fillTexts(count);
        }

        private void fillTexts(int count) {
            Random random = new Random();
            for (int i = 0; i < count; i++) {
                char[] buf = new char[random.nextInt(10)];
                Arrays.fill(buf, (char) (random.nextInt(26) + 65));
                mTexts[i] = new String(buf);
            }
        }
        static final int TEXT = 0;
        static final int TITLE = 1;

        @Override
        public int getItemViewType(int position) {
            if (position % 10 == 0) return TITLE;
            return TEXT;
        }

        @Override
        public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup viewGroup, int viewType) {
            TextView view = new TextView(viewGroup.getContext());
            view.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT));
            if (viewType == TITLE) {
                return new TitleTextViewHolder(view);
            } else {
                return new TextViewHolder(view);
            }
        }

        @Override
        public void onBindViewHolder(RecyclerView.ViewHolder viewHolder, int position) {
            TextView itemView = (TextView) viewHolder.itemView;
            if(viewHolder instanceof TitleTextViewHolder) {
                itemView.setText("~~~"+mTexts[position]+"~~~~");
            }else{
                itemView.setText(position+". "+mTexts[position]);
            }
        }

        @Override
        public int getItemCount() {
            return mTexts.length;
        }

        static class TextViewHolder extends RecyclerView.ViewHolder{

            public TextViewHolder(TextView itemView) {
                super(itemView);
                itemView.setTextAppearance(itemView.getContext(), R.style.TextAppearance_AppCompat_Medium);
            }
        }

        static class TitleTextViewHolder extends RecyclerView.ViewHolder{

            public TitleTextViewHolder(TextView itemView) {
                super(itemView);
                itemView.setTextAppearance(itemView.getContext(), R.style.TextAppearance_AppCompat_Headline);
                itemView.setGravity(Gravity.CENTER_HORIZONTAL);
            }
        }
    }
}