一：RecyclerView的用法：
RecyclerView是google在2014年I/O大会上提出新的用于取代ListView的组件，是 android-support-v7-21 版本中新增的一个 Widgets，它的灵活性与可替代性比listview更好。
使用 RecyclerView首先应该认识两个要点：
1. Adapter：使用RecyclerView之前，需要继承RecyclerView.Adapter定义一个自己的适配器，作用是将数据与每一个item的界面进行绑定，注意，与ListView不同，这里不在是使用传统的ArrayAdapter、SimpleAdapter、BaseAdapter。
2.LayoutManager： 控制每个Item项的布局显示。
目前SDK中提供了三种自带的LayoutManager:
LinearLayoutManager（可以实现垂直滚动的线性列表、水平线滚动性列表）
GridLayoutManager （可以实现垂直Grid列表、水平线Grid列表列表）
StaggeredGridLayoutManager (可以实现瀑布流列表)
RecyclerView的详细用法可以参考：
http://developer.android.com/reference/android/support/v7/widget/RecyclerView.html
http://www.jcodecraeer.com/a/anzhuokaifa/androidkaifa/2014/1118/2004.html
http://blog.csdn.net/lmj623565791/article/details/45059587
二：SwipeRefreshLayout的用法：
SwipeRefreshLayout也是一个下拉刷新控件，已经被加在在support v4兼容包下，两个要点：
1. 只要在需要刷新的控件最外层加上SwipeRefreshLayout，然后他的child首先是可滚动的view，如RecyclerView、ListView等
2. 实现SwipeRefreshLayout.OnRefreshListener接口，并找到SwipeRefreshLayout组件注册监听事件。注意：下拉刷新的数据更新逻辑代码应该写在onRefresh()方法中。
SwipeRefreshLayout的详细用法可以参考：
http://developer.android.com/reference/android/support/v4/widget/SwipeRefreshLayout.html
http://www.jcodecraeer.com/a/anzhuokaifa/androidkaifa/2014/1028/1861.html
三、下面我通过RecyclerView+SwipeRefreshLayout实现下拉刷新的垂直列表来演示RecyclerView及SwipeRefreshLayout的用法：
运行效果图gif：
1. 在build.gradle 中添加依赖
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| compile 'com.android.support:recyclerview-v7:22.2.0'
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这里只要是recyclerview-v7:21.0.+就可以了。
2. 创建布局文件
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<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.SwipeRefreshLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="@+id/id_swiperefreshlayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="@string/appbar_scrolling_view_behavior">
<android.support.v7.widget.RecyclerView
android:id="@+id/id_recyclerview"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</android.support.v4.widget.SwipeRefreshLayout>
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3.继承RecyclerView.Adapter创建自己的Adapter.
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public class MyRecyclerViewAdapter extends RecyclerView.Adapter<MyRecyclerViewAdapter.ViewHolder>{
public String[] datass;
public MyRecyclerViewAdapter(String[] datas){
super();
this.datass = datas;
}
public static interface OnItemClickListener{
void onItemClick(View view, int positon);
}
private OnItemClickListener mOnItemClickListener;
public void setOnItemClickListener(OnItemClickListener listener) {
this.mOnItemClickListener = listener;
}
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = LayoutInflater.from(parent.getContext()).inflate(android.R.layout.simple_list_item_1,parent,false);
ViewHolder viewHolder= new ViewHolder(view);
return viewHolder;
}
@Override
public void onBindViewHolder(final ViewHolder holder, final int position) {
holder.textView.setText(datass[position]);
if (mOnItemClickListener!=null){
holder.itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
mOnItemClickListener.onItemClick(holder.itemView, position);
}
});
}
}
@Override
public int getItemCount() {
return datass.length;
}
public class ViewHolder extends RecyclerView.ViewHolder {
public TextView textView;
public ViewHolder(View itemView) {
super(itemView);
textView = (TextView) itemView.findViewById(android.R.id.text1);
}
}
}
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4.在Activity中找到RecyclerView并绑定自定义的Adapter显示列表，实现SwipeRefreshLayout.OnRefreshListener接口，并找到SwipeRefreshLayout组件注册监听事件。注意：下拉刷新的数据更新逻辑代码应该写在onRefresh()方法中。
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public class MainActivity extends AppCompatActivity implements SwipeRefreshLayout.OnRefreshListener{
private RecyclerView mRecyclerView;
private SwipeRefreshLayout swipeRefreshLayout;
private MyRecyclerViewAdapter adapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
fab.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
.setAction("Action", null).show();
}
});
initVerticalRecyclerView();
swipeRefreshLayout = (SwipeRefreshLayout) findViewById(R.id.id_swiperefreshlayout);
swipeRefreshLayout.setColorSchemeResources(android.R.color.white,
android.R.color.holo_green_light,
android.R.color.holo_orange_light, android.R.color.holo_red_light);
swipeRefreshLayout.setOnRefreshListener(this);
}
private void initVerticalRecyclerView() {
mRecyclerView = (RecyclerView) findViewById(R.id.id_recyclerview);
LinearLayoutManager layoutManager = new LinearLayoutManager(this,LinearLayoutManager.VERTICAL,false);
mRecyclerView.setLayoutManager(layoutManager);
mRecyclerView.setHasFixedSize(true);
final String[] datas = new String[20];
for(int i=0; i<datas.length; i++){
datas[i]="item"+i;
}
adapter = new MyRecyclerViewAdapter(datas);
mRecyclerView.setAdapter(adapter);
adapter.setOnItemClickListener(new MyRecyclerViewAdapter.OnItemClickListener() {
@Override
public void onItemClick(View view, int positon) {
Toast.makeText(getBaseContext(), "item"+positon, Toast.LENGTH_LONG).show();
}
});
}
@Override
public void onRefresh() {
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
swipeRefreshLayout.setRefreshing(false);
for (int i=0; i<11; i++) {
int temp = (int) (Math.random() * 10);
adapter.datass[i] = "new" + temp;
}
adapter.notifyDataSetChanged();
}
}, 1000);
}
}
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完整源码可以到我的github下载：https://github.com/crazyfzw/RecyclerViewDemo