Android dropdown reload on load Smartrefreshlayout + Recyclerview

When it comes to Android refresh, it can be a bit of a struggle, finally found that there are ready-made controls, and very useful, here to record.

The original is 78781682, here is to see after, combined with their actual problems encountered in writing.

First introduce the package.

    drop-down box    implementation ' COM.ANDROID.SUPPORT:RECYCLERVIEW-V7:28.0.0-BETA01 '    implementation ' com.scwang.smartrefresh:smartrefreshlayout:1.0.3 '    implementation ' Com.scwang.smartrefresh: smartrefreshheader:1.0.3 '//Do not use special header, can not add this line

Recyclerview is for the data display, because in use, found using the ListView will error, but I see others use the success of, specifically I also lazy to check.

Recyclerview after the concrete in the study bar, anyway is a more useful thing is.
The first is the paging file Activity_main.xml

<com.scwang.smartrefresh.layout.smartrefreshlayout    xmlns:android= "http://schemas.android.com/apk/res/ Android "xmlns:app=" Http://schemas.android.com/apk/res-auto "xmlns:tools=" Http://schemas.android.com/tools " Android:id= "@+id/refreshlayout" android:layout_width= "match_parent" android:layout_height= "match_parent" Tools: Context= ". Mainactivity "    ><android.support.v7.widget.recyclerview    android:id=" @+id/recyclerview "    Android:layout_width= "Match_parent"    android:layout_height= "match_parent"    android:overscrollmode= "never "    android:background=" #fff "/></com.scwang.smartrefresh.layout.smartrefreshlayout>

Next is the specific layout display file: Item.xml

<?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 "android:layout_height=" 60DP "and roid:gravity= "center" > <imageview android:id= "@+id/iv_image" android:layout_width= "60DP" and roid:layout_height= "60DP" android:gravity= "center" android:background= "@mipmap/ic_launcher" ></imagevie w> <linearlayout android:layout_width= "match_parent" android:layout_height= "Match_parent" an droid:orientation= "vertical" > <textview android:id= "@+id/tv_title" android:layout_width = "Match_parent" android:layout_height= "30DP" android:text= "title" android:gravity= "Center "></TextView> <textview android:id=" @+id/tv_content "Android:layout_w Idth= "Match_parent" Androidoid:layout_height= "30DP" android:text= "content1231231231232323" android:gravity= "center" ></TextView> </LinearLayout></LinearLayout>

The Bean object that is displayed,

Package Com.example.administrator.shuaxin;public class Itembean {    int itemimage;    String Itemtitle;    String itemcontent;    Public Itembean (int itemimage, string itemtitle, String itemcontent) {        this.itemtitle = itemtitle;        This.itemcontent = itemcontent; this.itemimage = itemimage;}}      

Adapter Myadapter:

PackageCom.example.administrator.shuaxin;importAndroid.support.v7.widget.recyclerview;importAndroid.view.layoutinflater;importAndroid.view.view;importAndroid.view.viewgroup;importAndroid.widget.imageview;importAndroid.widget.textview;importJava.util.list;public class Myadapter extends recyclerview.adapter<myadapter.viewholder>{Private list<itembean>Mlist; Static Class Viewholder extendsrecyclerview.viewholder{View MyView; ImageView ImageView; TextView title; TextView content; PublicViewholder (View Itemview) {Super(Itemview); MyView =Itemview; ImageView =(ImageView) Itemview.findviewbyid (r.id.iv_image); title =(TextView) Itemview.findviewbyid (r.id.tv_title); Content =(TextView) Itemview.findviewbyid (r.id.tv_content); }} public Myadapter (list<itembean>List) {this.mlist =List } @Override Public Viewholder oncreateviewholder (viewgroup parent, intViewType) {View view = Layoutinflater.from (Parent.getcontext ()). Inflate (R.layout.item,null); final Viewholder holder = new viewholder (view); return holder;}//Bind data to the control @Override public void Onbindviewholder (viewholder holder, int position) {Itembean Bean = mlist.get (position); Holder.imageView.setBackgroundResource (bean.itemimage); Holder.title.setText (Bean.itemtitle); Holder.content.setText (bean.itemcontent); } @Override public int GetItemCount () {return mlist.size ();}//The following two methods are provided to the page to refresh and load when the public void add is called (LIST<ITEMB Ean> addmessagelist) {//Add data int position = mlist.size (); Mlist.addall (position, addmessagelist); notifyiteminserted (position); } public void Refresh (list<itembean> newlist) {//Refresh Data Mlist.removeall (mlist); Mlist.addall (NewList); Notifydatasetchanged (); }}

Then the activity file.

PackageCom.example.administrator.shuaxin;importAndroid.support.v7.app.appcompatactivity;importAndroid.os.bundle;importAndroid.support.v7.widget.linearlayoutmanager;importAndroid.support.v7.widget.recyclerview;importCom.scwang.smartrefresh.header.materialheader;importCom.scwang.smartrefresh.layout.api.refreshlayout;importCom.scwang.smartrefresh.layout.footer.classicsfooter;importCom.scwang.smartrefresh.layout.header.classicsheader;importCom.scwang.smartrefresh.layout.listener.onloadmorelistener;importCom.scwang.smartrefresh.layout.listener.onrefreshlistener;importJava.util.arraylist;importJava.util.date;importJava.util.List; public class Mainactivity extendsappcompatactivity {Private list<itembean>List PrivateMyadapter Myadapter; PrivateRecyclerview Recyclerview; Refreshlayout refreshlayout; @Override protected voidOnCreate (Bundle savedinstancestate) {Super. OnCreate (Savedinstancestate); Setcontentview (R.layout.activity_main); Refreshlayout =(refreshlayout) Findviewbyid (r.id.refreshlayout); Initial data loadInitdate (); Refresh Data LoadSetpullrefresher (); } private voidInitdate () {list = new arraylist<itembean>(); for (int i=0;i<20;i++) {List.add (newItembean (R.mipmap.ic_launcher, "inittitle" +I, new Date (). toString () + "")); } myadapter = newMyadapter (list); Recyclerview =(Recyclerview) Findviewbyid (R.id.recyclerview); Linearlayoutmanager LayoutManager = new Linearlayoutmanager (this);//Vertical Linear layoutRecyclerview.setlayoutmanager (LayoutManager); Recyclerview.setadapter (Myadapter); } private voidSetpullrefresher () {//Set header to Materialheader//set header to classicsfooter more classic style refreshlayout.setrefreshheader (new Classicsheader (This)); Set Footer to Classic style refreshlayout.setrefreshfooter (new Classicsfooter (this)); Refreshlayout.setonrefreshlistener (NewOnrefreshlistener () {@Override public voidOnrefresh (Refreshlayout refreshlayout) {///Where to perform a pull-up refresh (network request, update UI, etc.)//analog network request to the data arraylist<itembean> NewList = new Arraylist<itembean>(); for (int i=0;i<20;i++) {newlist.add (new Itembean (R.mipmap.ic_launcher, "newtitle" +I, new Date () . toString () + "" )); } myadapter.refresh (NewList); Refreshlayout.finishrefresh (2000/*,false*/);//Do not pass time immediately stop flush incoming false indicates refresh failed }); Refreshlayout.setonloadmorelistener (New Onloadmorelistener () {@Override public void Onloadmore ( Refreshlayout refreshlayout) {//analog network request to data arraylist<itembean> NewList = new arraylist<itembean>(); for (int i=0;i<20;i++) {newlist.add (new Itembean (R.mipmap.ic_launcher, "addtitle" +I, new Date (). ToString () + "" )); } myadapter.add (NewList); Here to perform the specific operation of the drop-down load (network request, update UI, etc.) Refreshlayout.finishloadmore (2000/*,false*/);//Do not pass the time immediately stop flush incoming false indicates load failed }); } }

Look at the effect.

Android dropdown Refresh on load smartrefreshlayout + recyclerview