1. 什么是RecyclerView
RecyclerView 是 Android-support-v7-21 版本中新增的一个 Widgets,官方对于它的介绍则是：RecyclerView 是 ListView 的升级版本，更加先进和灵活。简单来说就是：RecyclerView是一种新的视图组，目标是为任何基于适配器的视图提供相似的渲染方式。它被作为ListView和GridView控件的继承者，在最新的support-V7版本中提供支持。
2. 使用RecyclerView需要掌握什么
Adapter --- 包装数据集合并且为每个条目创建视图
LayoutManager --- 将每个条目的视图放置于适当的位置
OnItemClickListener --- 给每个条目设置点击事件
SwipeRefreshLayout --- 给RecyclerView添加下拉刷新事件
ItemDecoration--- 在每个条目的视图的周围或上面绘制一些装饰视图
ItemAnimator --- 在条目被添加、移除或者重排序时添加动画效果
3. 使用RecyclerView前需要准备什么
添加依赖包（以Android Studio为例）
public class RecyclerAdapter extends RecyclerView.Adapter {
private List<Model> models;
public RecyclerAdapter(List<Model> models){
this.models = models;
class ViewHolder extends RecyclerView.ViewHolder{
private ImageView picture;
private TextView title,text;
public ViewHolder(View itemView) {
super(itemView);
picture = (ImageView) itemView.findViewById(R.id.picture);
title = (TextView) itemView.findViewById(R.id.title);
text = (TextView) itemView.findViewById(R.id.text);
public ImageView getPicture(){
return picture;
public TextView getTitle(){
return title;
public TextView getText(){
return text;
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
return new ViewHolder(LayoutInflater.from(parent.getContext()).inflate(R.layout.item_view,null));
@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, final int position) {
final ViewHolder vh = (ViewHolder) holder;
vh.getPicture().setImageResource(models.get(position)
.getPicture());
vh.getTitle().setText(models.get(position).getTitle());
vh.getText().setText(models.get(position).getText());
@Override public int getItemCount() {
return models.size();
5. LayoutManager有什么作用
由于RecyclerView已经不单单像以前ListView或者GridView一样，它被作为ListView和GridView控件的继承者，所以在使用它的时候需要通过设置它的LayoutManager去规定它是哪一种类型，另外也可通过设置LayoutManager去设置它是横向还是纵向的列表，以及是否反转。纵向列表：（第三个参数是设置是否反转，即滑动方向）
mLayoutManager = new LinearLayoutManager(this,LinearLayoutManager.VERTICAL,false);
recyclerview.setLayoutManager(mLayoutManager);
横向列表：
mLayoutManager = new LinearLayoutManager(this,LinearLayoutManager.HORIZONTAL,false);
recyclerview.setLayoutManager(mLayoutManager);
mLayoutManager = new GridLayoutManager(this,2);
recyclerview.setLayoutManager(mLayoutManager);
水平表格布局：（第四个参数代表是否反转）
mLayoutManager = new GridLayoutManager(this,2,LinearLayoutManager.HORIZONTAL,false);
recyclerview.setLayoutManager(mLayoutManager);
6. 为什么要自己添加OnItemClickListener
RecyclerView有一个缺点，在RecyclerView中，没有一个onItemClickListener方法。所以目前在适配器中处理这样的事件比较好。如果想要从适配器上添加或移除条目，需要明确通知适配器。这与先前的notifyDataSetChanged()方法稍微有些不同。具体操作在适配器代码中就可以体现。具体代码如下：
public class RecyclerAdapter extends RecyclerView.Adapter {
private List<Model> models;
public RecyclerAdapter(List<Model> models){
this.models = models;
class ViewHolder extends RecyclerView.ViewHolder{
private ImageView picture;
private TextView title,text;
public ViewHolder(View itemView) {
super(itemView);
picture = (ImageView) itemView.findViewById(R.id.picture);
title = (TextView) itemView.findViewById(R.id.title);
text = (TextView) itemView.findViewById(R.id.text);
public ImageView getPicture(){
return picture;
public TextView getTitle(){
return title;
public TextView getText(){
return text;
@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
return new ViewHolder(LayoutInflater.from(parent.getContext()).inflate(R.layout.item_view,null));
@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, final int position) {
final ViewHolder vh = (ViewHolder) holder;
vh.getPicture().setImageResource(models.get(position)
.getPicture());
vh.getTitle().setText(models.get(position).getTitle());
vh.getText().setText(models.get(position).getText());
//如果设置了回调，就设置点击事件
if (mOnItemClickListener != null){
vh.itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
mOnItemClickListener.onItemClick(vh.itemView,position);
@Override public int getItemCount() {
return models.size();
/** * ItemClick的回调接口 */
public interface OnItemClickListener{
void onItemClick(View view,int position);
private OnItemClickListener mOnItemClickListener;
public void setmOnItemClickListener(OnItemClickListener mOnItemClickListener){
this.mOnItemClickListener = mOnItemClickListener;
7. 实现下拉刷新与上拉加载更多
其实跟以前一样，原生的ListView或者GridView都不能满足实际App的需要，很多时候都要通过自定义View去实现列表的下拉刷新和上拉加载，RecyclerView也是一样，不过这里不会介绍如何去自定义RecyclerView，相反，我们会借用SwipeRefreshLayout这个组件，更快地去实现列表刷新功能界面布局如下：
<view android:id="@+id/swipeRefreshLayout"
class="android.support.v4.widget.SwipeRefreshLayout"
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">
</android.support.v7.widget.RecyclerView>
</view>
设置下拉刷新监听事件：
swipeRefreshLayout = (SwipeRefreshLayout) findViewById(R.id.swipeRefreshLayout);
swipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
@Override public void onRefresh() {
//重新获取数据
//获取完成
swipeRefreshLayout.setRefreshing(false);
设置上拉加载更多可以通过设置滑动监听事件来实现：
recyclerview.setOnScrollListener(new RecyclerView.OnScrollListener() {
@Override
public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
super.onScrollStateChanged(recyclerView, newState);
if (newState == RecyclerView.SCROLL_STATE_IDLE && lastVisibleItem + 1 == adapter.getItemCount()) {
swipeRefreshLayout.setRefreshing(true);
//分页获取数据
//获取完成
swipeRefreshLayout.setRefreshing(false);
@Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
super.onScrolled(recyclerView, dx, dy);
lastVisibleItem = mLayoutManager.findLastVisibleItemPosition();
