附录1的文章，介绍RecyclerView的定点更新，现在介绍RecyclerView的批量更新，RecyclerView的批量更新通过notifyItemRangeChanged实现，notifyItemRangeChanged官方文档：

  /**
         * Notify any registered observers that the <code>itemCount</code> items starting at
         * position <code>positionStart</code> have changed.
         * Equivalent to calling <code>notifyItemRangeChanged(position, itemCount, null);</code>.
         *
         * <p>This is an item change event, not a structural change event. It indicates that
         * any reflection of the data in the given position range is out of date and should
         * be updated. The items in the given range retain the same identity.</p>
         *
         * @param positionStart Position of the first item that has changed
         * @param itemCount Number of items that have changed
         *
         * @see #notifyItemChanged(int)
         */
        public final void notifyItemRangeChanged(int positionStart, int itemCount) {
            mObservable.notifyItemRangeChanged(positionStart, itemCount);
        }

示例代码：

package zhangphil.demo;

import android.app.Activity;
import android.graphics.Color;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.LinearLayout;
import android.widget.TextView;

import java.util.ArrayList;
import java.util.Random;


public class MainActivity extends Activity {
    private ArrayList data = new ArrayList();

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        for (int i = 0; i < 5; i++) {
            data.add(System.currentTimeMillis());
        }

        RecyclerView mRecyclerView = findViewById(R.id.recycler_view);

        LinearLayoutManager mLayoutManager = new LinearLayoutManager(this);
        mLayoutManager.setOrientation(LinearLayout.VERTICAL);
        mRecyclerView.setLayoutManager(mLayoutManager);

        final RecyclerView.Adapter mAdapter = new MyAdapter();
        mRecyclerView.setAdapter(mAdapter);

        final Random random = new Random();

        findViewById(R.id.button).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                int count = random.nextInt(data.size());
                for (int i = 0; i < count; i++) {
                    data.set(i, System.currentTimeMillis());
                }

                mAdapter.notifyItemRangeChanged(0, count);
            }
        });
    }


    private class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> {
        public MyAdapter() {
            super();
        }

        @Override
        public ViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
            View view = LayoutInflater.from(getApplicationContext()).inflate(android.R.layout.simple_list_item_2, null);
            ViewHolder holder = new ViewHolder(view);
            return holder;
        }

        @Override
        public void onBindViewHolder(ViewHolder viewHolder, int i) {
            viewHolder.text1.setText(i + "");
            viewHolder.text2.setText(data.get(i) + "");
        }

        @Override
        public int getItemCount() {
            return data.size();
        }

        public class ViewHolder extends RecyclerView.ViewHolder {
            public TextView text1;
            public TextView text2;

            public ViewHolder(View itemView) {
                super(itemView);
                text1 = itemView.findViewById(android.R.id.text1);
                text1.setTextColor(Color.RED);
                text2 = itemView.findViewById(android.R.id.text2);
                text2.setTextColor(Color.BLUE);
            }
        }
    }
}

附录：
1，《Android RecyclerView更新子项目notifyItemChanged》链接：http://blog.csdn.net/zhangphil/article/details/78565738