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 itemCount items starting at         * position positionStart have changed.         * Equivalent to calling notifyItemRangeChanged(position, itemCount, null);.         *         * 
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 It indicates that         * any reflection of the data in the given position range is out of date and should         * be updated.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.
         *         * @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
     
       {        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