在过去很多年，我们的PC或者手机设备都是采用拟物化的设计风格，IOS采用扁平化的特性，android在2014年IO大会上说采用Material Design的设计风格，显示效果不能过于生硬的转换，而是平滑，过度的切换方式，避免线性的动画效果，而是代替以曲线的效果进行展示，并且所有的图标的动画切换都应该无缝化切换。
如果想深入了解材料设计即（material Design）的设计：
可以参看如下网址：http://design.1sters.com，尤其是android 应用的UED设计师们，可以看下：
开发中要在libs文件夹下面中加上android_support_v4.jar包
java.lang.Object
android.view.View
android.view.ViewGroup
android.support.v7.widget.RecyclerView
官网地址：https://developer.android.com/reference/android/support/v7/widget/RecyclerView.html
RecyclerView 一个特点就是，将 layout 抽象成了一个 LayoutManager，RecylerView 不负责子 View 的布局， 我们可以自定义 LayoutManager 来实现不同的布局效果， 目前只提供了LinearLayoutManager。 LinearLayoutManager 可以指定方向，默认是垂直， 可以指定水平， 这样就轻松实现了水平的 ListView。
除了LinearLayoutManager还有其他两种布局管理器：
GridLayoutManager 网格的item
StaggeredGridLayoutManager 交错的网格item
当然也可以通过集成ResyclerView,layoutManager类来自定义自己的布局管理器。
RecyclerView的使用过程中会使用到一个Adapter:RecyclerView.Adapter，里面屏蔽了以前写BaseAdapter的中好多重读的代码的编写，将加载item布局放在onCreateViewHolder（ViewGroup viewGroup, int i）方法中，在onBindViewHolder(ViewHolder viewHolder, int i)中数据加载到item中。用于优化的viewHolder也是继承自RecyclerView.ViewHolder。
RecyclerView不提供setOnItemClickListener方法，你可以在ViewHolder中添加事件。
RecyclerView之间的分割线：
http://my.oschina.net/xesam/blog/351408
官网地址：https://developer.android.com/reference/android/support/v7/widget/RecyclerView.Adapter.html
关于使用可以参考：
http://www.jcodecraeer.com/a/anzhuokaifa/androidkaifa/2014/0710/1631.html
http://blog.csdn.net/cym492224103/article/details/41719497
编写demo:
布局文件：
activity_main.xml
xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/activity_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.wangfubin.recyclerview.MainActivity">
<android.support.v7.widget.RecyclerView
android:id="@+id/id_recyclerview"
android:divider="#ffff0000"
android:dividerHeight="10dp"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
RelativeLayout>
item_gridview.xml:
xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="100dp"
xmlns:tool="http://schemas.android.com/tools"
android:background="#44ff0000"
android:layout_height="100dp">
<TextView
android:id="@+id/id_num"
android:layout_width="match_parent"
android:layout_height="50dp"
android:gravity="center"
tool:text="1" />
FrameLayout>
item_listview.xml
xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
xmlns:tool="http://schemas.android.com/tools"
android:background="#44ff0000"
android:layout_height="wrap_content">
<TextView
android:id="@+id/id_num"
android:layout_width="match_parent"
android:layout_height="50dp"
android:gravity="center"
tool:text="1" />
FrameLayout>
MainActivity.java
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.DefaultItemAnimator;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.StaggeredGridLayoutManager;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.Toast;
import java.util.ArrayList;
import java.util.List;
public class MainActivity extends AppCompatActivity {
private RecyclerView mRecyclerView;
private ListmDatas;
private HomeAdapter mAdapter;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initData();
mRecyclerView = (RecyclerView) findViewById(R.id.id_recyclerview);
//垂直线性RecyclerView
//mRecyclerView.setLayoutManager(new LinearLayoutManager(this));
//Grid布局
//mRecyclerView.setLayoutManager(new GridLayoutManager(this,4));
//瀑布流
//垂直方向
//mRecyclerView.setLayoutManager(new StaggeredGridLayoutManager(4, StaggeredGridLayoutManager.VERTICAL));
//水平方向
mRecyclerView.setLayoutManager(new StaggeredGridLayoutManager(4, StaggeredGridLayoutManager.HORIZONTAL));
mRecyclerView.setAdapter(mAdapter = new HomeAdapter(getApplicationContext(),initData()));
//垂直线性RecyclerView分割线
//mRecyclerView.addItemDecoration(new DividerItemDecoration(this, DividerItemDecoration.VERTICAL_LIST));
//GridView的分隔线
mRecyclerView.addItemDecoration(new DividerGridItemDecoration(this));
//添加默认动画
mRecyclerView.setItemAnimator(new DefaultItemAnimator());
mAdapter.setOnItemClickLitener(new HomeAdapter.OnItemClickLitener() {
@Override
public void onItemClick(View view, int position) {
Toast.makeText(getApplicationContext(),"单击事件",Toast.LENGTH_SHORT).show();
}
@Override
public void onItemLongClick(View view, int position) {
Toast.makeText(getApplicationContext(),"长按事件",Toast.LENGTH_SHORT).show();
}
});
}
/**
* 初始化模拟数据
* @return
*/
protected ListinitData() {
mDatas = new ArrayList();
for (int i = 'A'; i <'z'; i++) {
mDatas.add("" + (char) i);
}
return mDatas;
}
@Override
public boolean onCreateOptionsMenu(Menu menu)
{
getMenuInflater().inflate(R.menu.main, menu);
return super.onCreateOptionsMenu(menu);
}
@Override
public boolean onOptionsItemSelected(MenuItem item)
{
switch (item.getItemId())
{
case R.id.id_action_add:
//新增数据
mAdapter.addData(1);
break;
case R.id.id_action_delete:
//删除数据
mAdapter.removeData(1);
break;
}
return true;
}
}
HomeAdapter.java
import java.util.List;
import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.RecyclerView.ViewHolder;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnLongClickListener;
import android.view.ViewGroup;
import android.widget.TextView;
/**
* Created by wangfubin on 2016/11/12.
*/
class HomeAdapter extends RecyclerView.Adapter
{
private ListmDatas;
private LayoutInflater mInflater;
public interface OnItemClickLitener
{
void onItemClick(View view, int position);
void onItemLongClick(View view , int position);
}
private OnItemClickLitener mOnItemClickLitener;
public void setOnItemClickLitener(OnItemClickLitener mOnItemClickLitener)
{
this.mOnItemClickLitener= mOnItemClickLitener;
}
public HomeAdapter(Context context, Listdatas)
{
mInflater = LayoutInflater.from(context);
mDatas = datas;
}
@Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType)
{
MyViewHolder holder = new MyViewHolder(mInflater.inflate(
R.layout.item_listview, parent, false));
return holder;
}
@Override
public void onBindViewHolder(final MyViewHolder holder, final int position)
{
holder.tv.setText(mDatas.get(position));
// 如果设置了回调，则设置点击事件
if (mOnItemClickLitener != null)
{
holder.itemView.setOnClickListener(new OnClickListener()
{
@Override
public void onClick(View v)
{
int pos = holder.getLayoutPosition();
mOnItemClickLitener.onItemClick(holder.itemView, pos);
}
});
holder.itemView.setOnLongClickListener(new OnLongClickListener()
{
@Override
public boolean onLongClick(View v)
{
int pos = holder.getLayoutPosition();
mOnItemClickLitener.onItemLongClick(holder.itemView, pos);
removeData(pos);
return false;
}
});
}
}
@Override
public int getItemCount()
{
return mDatas.size();
}
public void addData(int position)
{
mDatas.add(position, "Insert One");
notifyItemInserted(position);
}
public void removeData(int position)
{
mDatas.remove(position);
notifyItemRemoved(position);
}
class MyViewHolder extends ViewHolder
{
TextView tv;
public MyViewHolder(View view)
{
super(view);
tv = (TextView) view.findViewById(R.id.id_num);
}
}
}
DividerItemDecoration.java
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