什么是RecyclerView？个人理解，它是一个在数据量大的时候，为了显示在界面上提供的灵活高效处理的控件。可以替代listview，gallery，gridview等控件。
如何使用？本篇文章只是热热身，不会过多介绍细节。
首先需要导入\sdk\extras\android\support\v7\recyclerview\libs\android-support-v7-recyclerview.jar包，如果sdk目录下没有该文件，则adt版本可能太低，建议升级或者从网上下载该库。
RecyclerView的使用准备多谢几篇，所以这篇只是入门。
国际惯例，先看效果图，此程序实现微信的会话记录界面。 
分析一下，该界面的每一项都是由四个组件构成，即图标，标题，描述，时间。所以，开始编写实体类。
package cn.edu.zafu.recyclerviewdemo;/** * 实体类 * @author lizhangqu * * 2015-3-10 */public class Item { //图标，简单起见存在本地drawable目录 private int img; //标题 private String title; //描述 private String description; //时间 private String time; //getter 和 setter public int getImg() { return img; } public void setImg(int img) { this.img = img; } public String getTitle() { return title; } public void setTitle(String title) { this.title = title; } public String getDescription() { return description; } public void setDescription(String description) { this.description = description; } public String getTime() { return time; } public void setTime(String time) { this.time = time; } @Override public String toString() { return "Item [img=" + img + ", title=" + title + ", description=" + description + ", time=" + time + "]"; }}编写完实体类后，开始对每一项的布局进行编写，使用相对布局
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="wrap_content" android:paddingBottom="10dp" android:paddingLeft="15dp" android:paddingRight="15dp" android:paddingTop="10dp" > <ImageView android:id="@+id/img" android:layout_width="48dp" android:layout_height="48dp" android:layout_alignParentLeft="true" android:layout_centerVertical="true" android:background="@drawable/icon" /> <TextView android:id="@+id/title" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="10dp" android:layout_marginTop="5dp" android:layout_toRightOf="@id/img" android:text="微信支付" android:textColor="#000" android:textSize="16sp" /> <TextView android:id="@+id/time" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentRight="true" android:layout_marginTop="5dp" android:text="晚上20:09" android:textColor="#777" android:textSize="12sp" /> <TextView android:id="@+id/description" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignLeft="@id/title" android:layout_below="@id/title" android:layout_marginTop="5dp" android:text="微信支付：支付成功通知" /></RelativeLayout>编写适配器，并编写接口处理点击事件
package cn.edu.zafu.recyclerviewdemo;import java.util.List;import android.support.v7.widget.RecyclerView;import android.view.LayoutInflater;import android.view.View;import android.view.View.OnClickListener;import android.view.ViewGroup;import android.widget.ImageView;import android.widget.TextView;import cn.edu.zafu.recyclerviewdemo.RecyclerAdapter.ItemViewHolder;public class RecyclerAdapter extends RecyclerView.Adapter<ItemViewHolder> { private List<Item> items; //点击监听事件 interface OnRecyclerViewItemClickListener{ void onClick(View view,int position); }; private OnRecyclerViewItemClickListener listener; //设置监听器 public void setListener(OnRecyclerViewItemClickListener listener) { this.listener = listener; } //构造函数，将数据赋值给成员变量 public RecyclerAdapter(List<Item> items) { this.items = items; } //获得数据大小 @Override public int getItemCount() { return items.size(); } @Override public ItemViewHolder onCreateViewHolder(ViewGroup viewGroup, int viewType) { //将布局进行绑定 View view = LayoutInflater.from(viewGroup.getContext()).inflate( R.layout.item, viewGroup, false); return new ItemViewHolder(view); } //绑定数据 @Override public void onBindViewHolder(final ItemViewHolder viewHolder,final int position) { Item item = items.get(position); viewHolder.img.setImageResource(item.getImg()); viewHolder.title.setText(item.getTitle()); viewHolder.description.setText(item.getDescription()); viewHolder.time.setText(item.getTime()); viewHolder.itemView.setOnClickListener(new OnClickListener() { //如果监听器非空，则回调 @Override public void onClick(View v) { if (listener!=null) { listener.onClick(viewHolder.itemView, position); } } }); } //ViewHolder，用于缓存，提高效率 public final static class ItemViewHolder extends RecyclerView.ViewHolder { //每一项的四个控件 ImageView img; TextView title; TextView description; TextView time; public ItemViewHolder(View itemView) { super(itemView); img = (ImageView) itemView.findViewById(R.id.img); title = (TextView) itemView.findViewById(R.id.title); description = (TextView) itemView.findViewById(R.id.description); time = (TextView) itemView.findViewById(R.id.time); } }}在Activity中使用，为recyclerview设置适配器，数据改变时的动画，
package cn.edu.zafu.recyclerviewdemo;import java.util.ArrayList;import android.app.Activity;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint;import android.os.Bundle;import android.support.v7.widget.DefaultItemAnimator;import android.support.v7.widget.LinearLayoutManager;import android.support.v7.widget.RecyclerView;import android.view.View;import android.widget.Toast;import cn.edu.zafu.recyclerviewdemo.RecyclerAdapter.OnRecyclerViewItemClickListener;public class MainActivity extends Activity { private RecyclerView recyclerView; private ArrayList<Item> items = new ArrayList<Item>(); @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState);initDatas(); setContentView(R.layout.activity_main); initDatas();//初始化数据 initViews();//初始化recyclerview } private void initViews() { recyclerView = (RecyclerView) findViewById(R.id.recyclerView); //新建适配器 RecyclerAdapter adapter = new RecyclerAdapter(items); //设置监听器 adapter.setListener(new OnRecyclerViewItemClickListener() { @Override public void onClick(View view, int position) { Toast.makeText(getApplicationContext(), items.get(position).getTitle(), Toast.LENGTH_LONG).show(); } }); //设置适配器 recyclerView.setAdapter(adapter); //默认动画效果 recyclerView.setItemAnimator(new DefaultItemAnimator()); //设置布局管理器，第三个参数为是否逆向布局 recyclerView.setLayoutManager(new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false)); //设置每一项的装饰，这里给它加入分隔线 recyclerView.addItemDecoration(new RecyclerView.ItemDecoration() { Paint paint = new Paint(); @Override public void onDraw(Canvas c, RecyclerView parent, RecyclerView.State state) { super.onDraw(c, parent, state); } @Override public void onDrawOver(Canvas c, RecyclerView parent, RecyclerView.State state) { super.onDrawOver(c, parent, state); paint.setColor(Color.LTGRAY); for (int i = 0, size = parent.getChildCount(); i < size; i++) { View child = parent.getChildAt(i); c.drawLine(child.getLeft(), child.getBottom(), child.getRight(), child.getBottom(), paint); } } }); //可以提高效率 recyclerView.setHasFixedSize(true); } private void initDatas() { Item item = new Item(); item.setImg(R.drawable.icon); item.setTitle("微信支付"); item.setDescription("微信支付：支付成功通知"); item.setTime("晚上20:35"); items.add(item); item = new Item(); item.setImg(R.drawable.icon); item.setTitle("微信支付"); item.setDescription("微信支付：支付成功通知"); item.setTime("晚上20:35"); items.add(item); item = new Item(); item.setImg(R.drawable.icon); item.setTitle("微信支付"); item.setDescription("微信支付：支付成功通知"); item.setTime("晚上20:35"); items.add(item); item = new Item(); item.setImg(R.drawable.icon); item.setTitle("微信支付"); item.setDescription("微信支付：支付成功通知"); item.setTime("晚上20:35"); items.add(item); item = new Item(); item.setImg(R.drawable.icon); item.setTitle("微信支付"); item.setDescription("微信支付：支付成功通知"); item.setTime("晚上20:35"); items.add(item); item = new Item(); item.setImg(R.drawable.icon); item.setTitle("微信支付"); item.setDescription("微信支付：支付成功通知"); item.setTime("晚上20:35"); items.add(item); item = new Item(); item.setImg(R.drawable.icon); item.setTitle("微信支付"); item.setDescription("微信支付：支付成功通知"); item.setTime("晚上20:35"); items.add(item); }}ItemDecoration也可以使用现成的，但是我没有在android源码里找打它，反而是在github上找到的它，这里贴出源码，其作用就是增加分隔线，支持水平和竖直状态，而我的代码只是简单处理了竖直状态下的分隔线
/* * Copyright (C) 2014 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */public class DividerItemDecoration extends RecyclerView.ItemDecoration { private static final int[] ATTRS = new int[]{ android.R.attr.listDivider }; public static final int HORIZONTAL_LIST = LinearLayoutManager.HORIZONTAL; public static final int VERTICAL_LIST = LinearLayoutManager.VERTICAL; private Drawable mDivider; private int mOrientation; public DividerItemDecoration(Context context, int orientation) { final TypedArray a = context.obtainStyledAttributes(ATTRS); mDivider = a.getDrawable(0); a.recycle(); setOrientation(orientation); } public void setOrientation(int orientation) { if (orientation != HORIZONTAL_LIST && orientation != VERTICAL_LIST) { throw new IllegalArgumentException("invalid orientation"); } mOrientation = orientation; } @Override public void onDraw(Canvas c, RecyclerView parent) { if (mOrientation == VERTICAL_LIST) { drawVertical(c, parent); } else { drawHorizontal(c, parent); } } public void drawVertical(Canvas c, RecyclerView parent) { final int left = parent.getPaddingLeft(); final int right = parent.getWidth() - parent.getPaddingRight(); final int childCount = parent.getChildCount(); for (int i = 0; i < childCount; i++) { final View child = parent.getChildAt(i); final RecyclerView.LayoutParams params = (RecyclerView.LayoutParams) child .getLayoutParams(); final int top = child.getBottom() + params.bottomMargin; final int bottom = top + mDivider.getIntrinsicHeight(); mDivider.setBounds(left, top, right, bottom); mDivider.draw(c); } } public void drawHorizontal(Canvas c, RecyclerView parent) { final int top = parent.getPaddingTop(); final int bottom = parent.getHeight() - parent.getPaddingBottom(); final int childCount = parent.getChildCount(); for (int i = 0; i < childCount; i++) { final View child = parent.getChildAt(i); final RecyclerView.LayoutParams params = (RecyclerView.LayoutParams) child .getLayoutParams(); final int left = child.getRight() + params.rightMargin; final int right = left + mDivider.getIntrinsicHeight(); mDivider.setBounds(left, top, right, bottom); mDivider.draw(c); } } @Override public void getItemOffsets(Rect outRect, int itemPosition, RecyclerView parent) { if (mOrientation == VERTICAL_LIST) { outRect.set(0, 0, 0, mDivider.getIntrinsicHeight()); } else { outRect.set(0, 0, mDivider.getIntrinsicWidth(), 0); } }}布局文件
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" > <android.support.v7.widget.RecyclerView android:id="@+id/recyclerView" android:layout_width="match_parent" android:layout_height="match_parent" /></RelativeLayout>整个使用过程还是相当简单的，这只是这个控件的使用的开始，而它的作用远远不止这些。更多的内容在之后的博文中详细写。
源码下载
http://download.csdn.net/detail/sbsujjbcy/8489667