"Android Notes" recyclerview+swiperefreshlayout example

through this article one will learn:Basic usage of 1.RecyclerView; 2. Basic usage of swiperefreshlayout; 3. Add a response event for the Recyclerview item.
Recyclerview simple, it is used to replace the traditional ListView,Recyclerview is more flexible, and can be combined with animation, you can easily add a variety of animation effects for each item, in addition, Recyclerview forced to use Viewholder mode, can improve performance.

：

Step: 1. Add dependencies:

Compile ' com.android.support:recyclerview-v7:21.0.0 ' compile ' com.android.support:support-v4:22.0.0 '

2. Writing activity layouts:

<relativelayout xmlns:android= "http://schemas.android.com/apk/res/android" xmlns:tools= "HTTP://SCHEMAS.A                Ndroid.com/tools "android:layout_width=" match_parent "android:layout_height=" Match_parent " tools:context= "Com.taobao.recyclerviewwithrefresh.ui.activity.GridActivity" > <android.support.v4.wi Dget. Swiperefreshlayout android:id= "@+id/refreshlayout_grid" android:layout_width= "Match_parent" android:l ayout_height= "Match_parent" > <android.support.v7.widget.recyclerview android:id= "@+id/recyclerView _grid "android:layout_width=" match_parent "android:layout_height=" Match_parent "android:s crollbars= "Vertical" ></android.support.v7.widget.RecyclerView> &LT;/ANDROID.SUPPORT.V4.WIDGET.SWIP Erefreshlayout></relativelayout>

3. Writing the layout of each item:

<?xml version= "1.0" encoding= "Utf-8"? ><linearlayout xmlns:android= "http://schemas.android.com/apk/res/ Android "              android:orientation=" horizontal "              android:layout_width=" match_parent "              xmlns:tools="/http/ Schemas.android.com/tools "              android:layout_height=" 50DP ">    <imageview        android:src=" @mipmap/ic_ Launcher "        android:padding=" 5DP "        android:layout_width=" wrap_content "        android:layout_height=" Wrap_ Content "/>    <textview        android:id=" @+id/tv "        android:layout_width=" Wrap_content "        Android : textsize= "18SP"        android:gravity= "center"        android:layout_height= "match_parent"        tools:text= "ss"/ ></LinearLayout>

4. Data Source:

Package Com.taobao.recyclerviewwithrefresh.data;import java.util.arraylist;import java.util.list;/** * Created by ROWANDJJ on 2015/3/24. */public class datasource{public    static final list<string> generatedata (int size)    {        if (size <= 0)            return null;        list<string> datas = new arraylist<> ();        for (int i = 0; i < size; i++)        {            Datas.add ("This is List data" +i);        }        return datas;}    }

5. Separator bar:

Package Com.taobao.recyclerviewwithrefresh.ui.adapter;import Android.content.context;import Android.content.res.typedarray;import Android.graphics.canvas;import Android.graphics.drawable.drawable;import Android.support.v7.widget.recyclerview;import android.view.view;/** * Created by ROWANDJJ on 2015/3/24. */public class Myitemdecoration extends recyclerview.itemdecoration{private static final int[] Attrs = {Android.    R.attr.listdivider};    Private drawable Mdivider;        Public Myitemdecoration (Context context) {TypedArray array = context.obtainstyledattributes (attrs);        Get separator Bar Mdivider = array.getdrawable (0);    Array.recycle (); } @Override public void Ondrawover (Canvas C, Recyclerview parent, recyclerview.state state) {Super.ondraw        Over (c, parent, state);        int count = Parent.getchildcount ();        int left = Parent.getpaddingleft ();        int right = Parent.getwidth ()-parent.getpaddingright (); for (int i = 0; I < count;            i++) {View v = parent.getchildat (i);            Recyclerview.layoutparams params = (recyclerview.layoutparams) v.getlayoutparams ();            int top = V.getbottom () + Params.bottommargin;            int bottom = top + mdivider.getintrinsicheight ();            Mdivider.setbounds (Left,top,right,bottom);        Mdivider.draw (c); }    }}

6. Write the data adapter and add a click response event for it

Package Com.taobao.recyclerviewwithrefresh.ui.adapter;import Android.support.v7.widget.recyclerview;import Android.view.layoutinflater;import Android.view.view;import Android.view.viewgroup;import Android.widget.TextView ; Import Com.taobao.recyclerviewwithrefresh.r;import java.util.list;/** * Created by ROWANDJJ on 2015/3/24. * */public class Mainrecycleradapter extends recyclerview.adapter<mainrecycleradapter.viewholder>{private List    <String> datas = null;    Private Onitemclicklistener Mlistener;    public void Setonitemclicklistener (Onitemclicklistener listener) {This.mlistener = listener;    } public Mainrecycleradapter (list<string> datas) {this.datas = datas; } @Override Public Viewholder oncreateviewholder (viewgroup parent, int viewtype) {final View Itemview = L        Ayoutinflater.from (Parent.getcontext ()). Inflate (R.layout.item, parent, false);        Itemview.setonclicklistener (New View.onclicklistener () {    @Override public void OnClick (View v) {if (Mlistener! = null) {                Mlistener.onitemclick (V, (String) Itemview.gettag ());        }            }        });    return new Viewholder (Itemview); } @Override public void Onbindviewholder (viewholder holder, int position) {String s = datas.get (position)        ;        Holder.binddata (s);    Holder.itemView.setTag (s);    } @Override public int getitemcount () {return datas.size (); /** * * * */public void Additems (list<string> items) {if (items = null) r        Eturn;        This.datas.addAll (0, items);    this.notifyitemrangeinserted (0, Items.size ());    } public interface Onitemclicklistener {public void Onitemclick (View view,string data);        } static class Viewholder extends Recyclerview.viewholder {private TextView mcontent; Public Viewholder (VieW Itemview) {super (Itemview);        Mcontent = (TextView) Itemview.findviewbyid (r.id.tv);        } public void Binddata (String s) {if (s! = null) Mcontent.settext (s); }    }}

Recyclerview does not provide callbacks like Onitemclicklistener, here we implement a ...

7. Main Page code:

Package Com.taobao.recyclerviewwithrefresh.ui.activity;import Android.content.intent;import Android.os.AsyncTask; Import Android.os.bundle;import Android.support.v4.widget.swiperefreshlayout;import Android.support.v7.app.actionbaractivity;import Android.support.v7.widget.linearlayoutmanager;import Android.support.v7.widget.recyclerview;import Android.view.menu;import Android.view.menuitem;import Android.view.view;import Android.widget.toast;import Com.taobao.recyclerviewwithrefresh.r;import Com.taobao.recyclerviewwithrefresh.data.datasource;import Com.taobao.recyclerviewwithrefresh.ui.adapter.myitemdecoration;import Com.taobao.recyclerviewwithrefresh.ui.adapter.mainrecycleradapter;import Java.util.arraylist;import java.util.list;/** * 1.RecyclerView Basic usage * LayoutManager * itemanimator * itemdecoration * * Recyclervi ew. Adapter * Recyclerview.viewholder * * 2.SwipeRefreshLayout Usage * * 3. Add a response event to each item of Recyclerview * 4. Control Recyclerview Scroll to a specific location: Recyclerview#scrollToposition * * * */public class Mainactivity extends Actionbaractivity implements swiperefreshlayout.onrefreshlistener{    Private Recyclerview Mrecyclerview;    Private Swiperefreshlayout mrefreshlayout;    Private Linearlayoutmanager Mlinearlayoutmanager;    Private Mainrecycleradapter Madapter;        @Override protected void OnCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate);        Setcontentview (R.layout.activity_main);        Mrecyclerview = (Recyclerview) Findviewbyid (R.id.recyclerview);        Mrefreshlayout = (swiperefreshlayout) Findviewbyid (r.id.refreshlayout);        Mrefreshlayout.setonrefreshlistener (this);        Mlinearlayoutmanager = new Linearlayoutmanager (this);        Madapter = new Mainrecycleradapter (Datasource.generatedata (20));        Mrecyclerview.setadapter (Madapter);        Each item is highly consistent and can be set to true to improve performance mrecyclerview.sethasfixedsize (true);        Mrecyclerview.setlayoutmanager (Mlinearlayoutmanager); Divider Line MRecYclerview.additemdecoration (New Myitemdecoration (this)); Add response event Madapter.setonitemclicklistener for each item (new Mainrecycleradapter.onitemclicklistener () {@ Override public void Onitemclick (view view, String data) {Toast.maketext (mainactivit            Y.this, "Data:" + data, Toast.length_short). Show ();    }        });    } @Override public void Onrefresh () {new Updatetask (). Execute ();  } private class Updatetask extends Asynctask<void,void,list<string>> {@Override protected             List<string> doinbackground (Void ... params) {try {thread.sleep (2000);            } catch (Interruptedexception e) {e.printstacktrace ();            } list<string> strings = new arraylist<> ();            Strings.add ("New Data 1");            Strings.add ("New Data 2");            Strings.add ("New Data 3"); StrinGs.add ("New Data 4");        return strings; } @Override protected void OnPostExecute (list<string> strings) {Madapter.additems (s           Trings);           Notification Refresh complete mrefreshlayout.setrefreshing (false);        Scroll to column header---> This is a handy API that can be slid to the specified position mrecyclerview.scrolltoposition (0); }} @Override public boolean Oncreateoptionsmenu (Menu menu) {getmenuinflater (). Inflate (R.menu.menu_mai        n, menu);    return true; } @Override public boolean onoptionsitemselected (MenuItem Item) {//Handle Action Bar item clicks here. T He action Bar would//automatically handle clicks on the Home/up button, so long/As you specify a parent        Activity in Androidmanifest.xml.        int id = item.getitemid (); Noinspection simplifiableifstatement if (id = = R.id.action_grid) {this.startactivity (new Inten            T (this, gridactivity.class));    return true;    }else if (id = = r.id.action_settings) {toast.maketext (Mainactivity.this, "Run ...", Toast.length_shor            T). Show ();        return true;    } return super.onoptionsitemselected (item); }}

"Android Notes" recyclerview+swiperefreshlayout example