Android中RecyclerView上拉下拉,分割线，多条目的实例代码

//activity的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="baway.com.cj.myrecyclerview2.mainactivity">
  <android.support.v4.widget.swiperefreshlayout
    android:id="@+id/swiperefreshlayout"
    android:layout_width="match_parent"
    android:layout_above="@+id/progress"
    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>
  </android.support.v4.widget.swiperefreshlayout>
  <progressbar
    android:id="@+id/progress"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_centerhorizontal="true"
    android:visibility="gone"
    android:layout_alignparentbottom="true"/>
</relativelayout>
item1的xml和item2的xml就一个背景颜色不同
<?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"
  android:background="#f00000"
  tools:context="baway.com.cj.myrecyclerview2.mainactivity">
  <textview
    android:id="@+id/name"
    android:layout_width="match_parent"
    android:layout_height="50dp"
    android:textsize="20sp"
    android:gravity="center"
    android:textcolor="#00ff00"/>
</relativelayout>
item2
<?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"
  android:background="#f000ff"
  tools:context="baway.com.cj.myrecyclerview2.mainactivity">
  <textview
    android:id="@+id/name"
    android:layout_width="match_parent"
    android:layout_height="50dp"
    android:textsize="20sp"
    android:gravity="center"
    android:textcolor="#00ff00"/>
</relativelayout>
//activity,有上啦下拉，添加分割线，
package baway.com.cj.myrecyclerview2;
import android.graphics.color;
import android.os.handler;
import android.support.v4.widget.swiperefreshlayout;
import android.support.v7.app.appcompatactivity;
import android.os.bundle;
import android.support.v7.widget.defaultitemanimator;
import android.support.v7.widget.linearlayoutmanager;
import android.support.v7.widget.recyclerview;
import android.util.log;
import android.view.view;
import android.widget.progressbar;
import android.widget.toast;
import java.util.arraylist;
public class mainactivity extends appcompatactivity {
  private recyclerview recyclerview;
  private mainadapter mainadapter;
  private swiperefreshlayout swiperefreshlayout;
  private linearlayoutmanager linearlayoutmanager;
  private progressbar progress;
  @override
  protected void oncreate(bundle savedinstancestate) {
    super.oncreate(savedinstancestate);
    setcontentview(r.layout.activity_main);
    initview();
    initdata();
  }
  private void initview() {
    recyclerview = (recyclerview)findviewbyid(r.id.recyclerview);
    swiperefreshlayout = (swiperefreshlayout) findviewbyid(r.id.swiperefreshlayout);
    progress = (progressbar)findviewbyid(r.id.progress);
    linearlayoutmanager = new linearlayoutmanager(this);
    recyclerview.setlayoutmanager(linearlayoutmanager);
    mainadapter = new mainadapter(this);
    mainadapter.setonclicklistener(new myitemonclicklistener() {
      @override
      public void onitemclick(view view, int position) {
        toast.maketext(mainactivity.this, " "+position, toast.length_short).show();
      }
    });
    recyclerview.setadapter(mainadapter);
    recyclerview.additemdecoration(new myitemdecoration());
    recyclerview.setitemanimator(new defaultitemanimator());
    swiperefreshlayout.setcolorschemecolors(color.red,color.green,color.blue);
    swiperefreshlayout.setprogressviewoffset(true,0,200);
    swiperefreshlayout.setonrefreshlistener(new swiperefreshlayout.onrefreshlistener() {
      @override
      public void onrefresh() {
        new handler().postdelayed(new runnable() {
          @override
          public void run() {
            swiperefreshlayout.setrefreshing(false);
          }
        },3000);
      }
    });
    recyclerview.addonscrolllistener(new recyclerview.onscrolllistener() {
      @override
      public void onscrolled(recyclerview recyclerview, int dx, int dy) {
        super.onscrolled(recyclerview, dx, dy);
        int lastvisibleitemposition = linearlayoutmanager.findlastvisibleitemposition();
        int itemcount = linearlayoutmanager.getitemcount();
        if (lastvisibleitemposition + 1 >= itemcount && dy > 0) {
          progress.setvisibility(view.visible);
          new handler().postdelayed(new runnable() {
            @override
            public void run() {
              progress.setvisibility(view.gone);
            }
          },3000);
        }
      }
      @override
      public void onscrollstatechanged(recyclerview recyclerview, int newstate) {
        super.onscrollstatechanged(recyclerview, newstate);
      }
    });
  }
  private void initdata() {
    arraylist<string> strings = new arraylist<>();
    for (int i = 0; i < 50; i++) {
      strings.add("name "+i);
    }
    mainadapter.setdata(strings);
    mainadapter.notifydatasetchanged();
  }
}
//adpter有多条目展示
package baway.com.cj.myrecyclerview2;
import android.content.context;
import android.support.v7.widget.recyclerview;
import android.view.layoutinflater;
import android.view.view;
import android.view.viewgroup;
import android.widget.textview;
import java.util.arraylist;
/**
 * created by cj on 2017/1/12.
 */
public class mainadapter extends recyclerview.adapter {
  private context context;
  private arraylist<string> datas = new arraylist<>();
  private myitemonclicklistener myitemonclicklistener;
  private final int type_0 = 0;
  private final int type_1 = 1;
  public mainadapter(context context) {
    this.context = context;
  }
  @override
  public int getitemviewtype(int position) {
    if (position %3 == 0) {
      return type_0;
    } else {
      return type_1;
    }
  }
  public void setonclicklistener(myitemonclicklistener onclicklistener) {
    this.myitemonclicklistener = onclicklistener;
  }
  @override
  public recyclerview.viewholder oncreateviewholder(viewgroup parent, int viewtype) {
    if (viewtype == type_0) {
      view inflate = layoutinflater.from(context).inflate(r.layout.item_main, null);
      return new myviewholder(inflate);
    } else {
      view inflate = layoutinflater.from(context).inflate(r.layout.item_main2, null);
      return new myviewholder2(inflate);
    }
  }
  @override
  public void onbindviewholder(recyclerview.viewholder holder, final int position) {
    if (getitemviewtype(position) == type_0) {
      myviewholder myviewholder = (myviewholder)holder;
      myviewholder.name.settext(datas.get(position));
      myviewholder.name.setonclicklistener(new view.onclicklistener() {
        @override
        public void onclick(view v) {
          myitemonclicklistener.onitemclick(v,position);
        }
      });
    } else {
      myviewholder2 myviewholder = (myviewholder2)holder;
      myviewholder.name.settext(datas.get(position));
      myviewholder.name.setonclicklistener(new view.onclicklistener() {
        @override
        public void onclick(view v) {
          myitemonclicklistener.onitemclick(v,position);
        }
      });
    }
  }
  @override
  public int getitemcount() {
    return datas.size();
  }
  public void setdata(arraylist<string> data) {
    if (data == null) {
      return;
    }
    this.datas.addall(data);
  }
  public class myviewholder extends recyclerview.viewholder{
    public textview name;
    public myviewholder(view itemview) {
      super(itemview);
      name = (textview) itemview.findviewbyid(r.id.name);
    }
  }
  public class myviewholder2 extends recyclerview.viewholder{
    public textview name;
    public myviewholder2(view itemview) {
      super(itemview);
      name = (textview) itemview.findviewbyid(r.id.name);
    }
  }
}
//自定义分割线继承系统的 recyclerview.itemdecoration
package baway.com.cj.myrecyclerview2;
import android.graphics.canvas;
import android.graphics.color;
import android.graphics.paint;
import android.graphics.rect;
import android.support.v7.widget.recyclerview;
import android.util.log;
import android.view.view;
/**
 * created by cj on 2017/1/12.
 */
public class myitemdecoration extends recyclerview.itemdecoration {
  private paint paint;
  public myitemdecoration() {
    paint = new paint();
    paint.setcolor(color.blue);
  }
  @override
  public void ondraw(canvas c, recyclerview parent, recyclerview.state state) {
    super.ondraw(c, parent, state);
    //c.drawcircle(300,300,300,paint);
    int childcount = parent.getchildcount();
    for (int i = 0; i < childcount; i++) {
      view childat = parent.getchildat(i);
      c.drawrect(childat.getleft(),childat.getbottom(),childat.getwidth()+childat.getleft(),childat.getbottom()+5,paint);
    }
  }
  @override
  public void ondrawover(canvas c, recyclerview parent, recyclerview.state state) {
    super.ondrawover(c, parent, state);
//    int childcount = parent.getchildcount();
//    for (int i = 0; i < childcount; i++) {
//      view childat = parent.getchildat(i);
//      c.drawrect(childat.getleft(),childat.gettop(),childat.getwidth()+childat.getleft(),childat.getbottom()+5,paint);
//    }
  }
  @override
  public void getitemoffsets(rect outrect, view view, recyclerview parent, recyclerview.state state) {
    super.getitemoffsets(outrect, view, parent, state);
    outrect.set(20,0,20,5);
  }
}