1丶安卓5.0以下，需要导入android-support-v7-recyclerview.jar （缺陷eclipes,以前用的时候As还没有多普及，用的eclipse开发，需要导入这个jar文件包）
2丶分割线需要自己加（缺陷）
3丶实现了ListView横向滑动 瀑布流 瀑布流推荐用框架（优点）
4丶解决了ListView条目复用图片错位的问题（优点）
5丶点击事件需要自己写（缺陷）
分割线可以说事recycleview的一大缺点，在这里我就给大家推荐了一个我认为不错的解决分割线的问题，在这里不做解释了，具体实现代码里有详细介绍：
MainActivity
import java.util.ArrayList;import java.util.List;import android.app.Activity;import android.os.Build.VERSION;import android.os.Bundle;import android.support.v7.widget.LinearLayoutManager;import android.support.v7.widget.RecyclerView;import android.support.v7.widget.RecyclerView.LayoutManager;import android.view.Menu;import android.view.MenuItem;public class MainActivity extends Activity {private RecyclerView mRecy;private List<String> list;private MyAdapter adapter;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);initList();initView();}private void initList() {list=new ArrayList<String>();for(int i=0;i<50;i++){list.add("item"+i+" ");}}private void initView() {mRecy=(RecyclerView) findViewById(R.id.mRecy);//创建线性布局管理者对象LinearLayoutManager manager=new LinearLayoutManager(this);//通过manager对象设置显示方向manager.setOrientation(RecyclerView.HORIZONTAL);//将管理者对象给recyclerViewmRecy.setLayoutManager(manager);mRecy.setAdapter(new MyAdapter(this, list));mRecy.addItemDecoration(new MyDecor(this, RecyclerView.HORIZONTAL));}
}
MyAdapter
import java.util.List;import android.content.Context;import android.support.v7.widget.RecyclerView;import android.support.v7.widget.RecyclerView.ViewHolder;import android.view.View;import android.view.ViewGroup;import android.widget.TextView;public class MyAdapter extends RecyclerView.Adapter<MyAdapter.VH>{private Context ctx;private List<String> list;public MyAdapter(Context ctx,List<String> list){this.ctx=ctx;this.list=list;}class VH extends ViewHolder{private TextView mTv;public VH(View itemView) { super(itemView); mTv=(TextView) itemView.findViewById(R.id.mTv); } }@Overridepublic int getItemCount() {// TODO Auto-generated method stubreturn list.size();}@Overridepublic void onBindViewHolder(VH arg0, int arg1) {arg0.mTv.setText(list.get(arg1));}@Overridepublic VH onCreateViewHolder(ViewGroup arg0, int arg1) { View v=View.inflate(ctx, R.layout.item, null); return new VH(v);}}
MyDecor
import android.R.drawable;import android.content.Context;import android.content.res.TypedArray;import android.graphics.Canvas;import android.graphics.Rect;import android.graphics.drawable.Drawable;import android.support.v7.widget.RecyclerView;import android.support.v7.widget.RecyclerView.ItemDecoration;import android.support.v7.widget.RecyclerView.LayoutParams;import android.support.v7.widget.RecyclerView.State;import android.view.View;public class MyDecor extends ItemDecoration{//定义一个水平和竖直常量private final int Horization=RecyclerView.HORIZONTAL;private final int Vertical=RecyclerView.VERTICAL;//创建一个int型的数组,在数组中存放android中自带的分割线private int[] attrs={android.R.attr.listDivider};//声明一个图片对象private Drawable drawable;//声明一个RecyclerView的方向private int oritation;public MyDecor(Context ctx, int orization) { TypedArray array=ctx.obtainStyledAttributes(attrs); drawable=array.getDrawable(0); array.recycle();//回收，防止内存溢出 //判断方向 if(orization!=Horization&&orization!=Vertical){ //如果既不是水平又不是竖直的，抛出异常 throw new IllegalArgumentException("没有改方向"); }else{ oritation=orization;}}@Overridepublic void onDraw(Canvas c, RecyclerView parent, State state) { // TODO Auto-generated method stub super.onDraw(c, parent, state); if(oritation==Vertical){ drawHor(c,parent); } if(oritation==Horization){ drawVer(c,parent); }}//水平方向回一条线private void drawHor(Canvas c, RecyclerView parent) {int left=parent.getPaddingLeft();int right=parent.getWidth()-parent.getPaddingRight();int itemCount=parent.getChildCount();for(int i=0;i<itemCount;i++){ View child=parent.getChildAt(i); //获得item上view视图的参数对象 RecyclerView.LayoutParams params=(LayoutParams) child.getLayoutParams(); //根据参数对象获取参数值 int top=child.getBottom()+params.bottomMargin; //设置bottom坐标 int bottom=top+drawable.getIntrinsicHeight(); drawable.setBounds(left, top, right, bottom); //花在画板上 drawable.draw(c); }}//垂直方向画一条线private void drawVer(Canvas c, RecyclerView parent) { int top=parent.getPaddingTop(); int bottom=parent.getHeight()-parent.getPaddingBottom(); int itemCount=parent.getChildCount();for(int i=0;i<itemCount;i++){ View child=parent.getChildAt(i); //获得item上view视图的参数对象 RecyclerView.LayoutParams params=(LayoutParams) child.getLayoutParams(); //根据参数对象获取参数值 int left=child.getRight()+params.rightMargin; //设置bottom坐标 int right=left+drawable.getIntrinsicWidth(); drawable.setBounds(left, top, right, bottom); //花在画板上 drawable.draw(c);}}@Overridepublic void getItemOffsets(Rect outRect, int itemPosition, RecyclerView parent) {// TODO Auto-generated method stubsuper.getItemOffsets(outRect, itemPosition, parent);} }
//以下是xml文件：
activity
<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" tools:context="cn.wdf.recyclerveiw.MainActivity" > <android.support.v7.widget.RecyclerView android:id="@+id/mRecy" android:layout_width="match_parent" android:layout_height="30dp"/></RelativeLayout>
item
<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="wrap_content" android:orientation="vertical" > <TextView android:id="@+id/mTv" android:layout_width="match_parent" android:layout_height="30dp"/></LinearLayout>
