Android-pulltorefresh drop-down Refresh library basic usage

Pulltorefresh is a very good set of pull-down refresh libraries that support:
Listview
Expandablelistview
Gridview
WebView
ScrollView
Horizontalscrollview
Viewpager
A variety of commonly used view types need to be refreshed, and it is also very convenient to use.
(: Https://github.com/chrisbanes/Android-PullToRefresh)

Pulltorefresh Basic usage:
1, add Pulltorefresh control in the layout file, such as Pulltorefreshlistview;
2, in the activity, set the listener Onrefreshlistener in response to user pull-down operation;
3, in the Listener's Onrefresh () method to perform data refresh operations, can be achieved through the asynctask;
4, after obtaining the data in Asynctask, remember to call the Onrefreshcomplete () method to notify the Pulltorefresh control data has been obtained, you can end the refresh operation.

Example: Pulltorefreshdemo
Operating effect:

View structure

Code Listing:
Layout file: Activity_main.xml

<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=" Match_parent "    android:paddingbottom= "@dimen/activity_vertical_margin"    android:paddingleft= "@dimen/activity_ Horizontal_margin "    android:paddingright=" @dimen/activity_horizontal_margin "    android:paddingtop=" @dimen /activity_vertical_margin "    tools:context=". Mainactivity ">     <com.handmark.pulltorefresh.library.pulltorefreshlistview        android:id=" @+id/pull_ To_refresh_listview "        android:layout_height=" fill_parent "        android:layout_width=" Fill_parent "/>< /relativelayout>

Java source code file: Mainactivity.java

Package Com.rainsong.pulltorefreshdemo;import Java.util.arrays;import Java.util.linkedlist;import Android.app.activity;import Android.os.asynctask;import Android.os.bundle;import android.text.format.DateUtils; Import Android.view.menu;import Android.widget.arrayadapter;import Android.widget.listview;import Com.handmark.pulltorefresh.library.pulltorefreshbase;import Com.handmark.pulltorefresh.library.pulltorefreshbase.onrefreshlistener;import Com.handmark.pulltorefresh.library.pulltorefreshlistview;public class Mainactivity extends Activity {private    Pulltorefreshlistview Mpulltorefreshlistview;    Private linkedlist<string> Mlistitems;    Private arrayadapter<string> Madapter;        @Override protected void OnCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate);                Setcontentview (R.layout.activity_main);        Set a listener to is invoked when the list should is refreshed. Mpulltorefreshlistview = (Pulltorefreshlistview) finDviewbyid (R.id.pull_to_refresh_listview); Mpulltorefreshlistview.setonrefreshlistener (New onrefreshlistener<listview> () {@Override Publ IC void Onrefresh (pulltorefreshbase<listview> refreshview) {String label = Dateutils.formatdatetime ( Getapplicationcontext (), System.currenttimemillis (), Dateutils.format_show_time | Dateutils.format_show_date |                                Dateutils.format_abbrev_all);                                Update the Lastupdatedlabel refreshview.getloadinglayoutproxy (). Setlastupdatedlabel (label);                Do work to refresh the list here.            New Getdatatask (). Execute ();                }        });                ListView Actuallistview = Mpulltorefreshlistview.getrefreshableview ();        Mlistitems = new linkedlist<string> ();                Mlistitems.addall (Arrays.aslist (mstrings)); Madapter = new Arrayadapter<string> (This, androiD.r.layout.simple_list_item_1, Mlistitems);    Actuallistview.setadapter (Madapter); } private class Getdatatask extends Asynctask<void, Void, string[]> {@Override protected Strin            G[] Doinbackground (Void ... params) {//simulates a background job.            try {thread.sleep (4000);        } catch (Interruptedexception e) {} return mstrings; } @Override protected void OnPostExecute (string[] result) {Mlistitems.addfirst ("Added after REFR            Esh ... ");                        Madapter.notifydatasetchanged ();            Call Onrefreshcomplete when the list has been refreshed.            Mpulltorefreshlistview.onrefreshcomplete ();        Super.onpostexecute (result); }} @Override public boolean Oncreateoptionsmenu (Menu menu) {//Inflate the menu, this adds items to the        Action Bar if it is present. Getmenuinflater (). Inflate (R.menu.main, menu);    return true; } private string[] mstrings = {"John", "Michelle", "Amy", "Kim", "Mary", "David", "Sunny", "James", "Maria" , "Michael", "Sarah", "Robert", "Lily", "William", "Jessica", "Paul", "Crystal", "Peter", "Jennifer" , "George", "Rachel", "Thomas", "Lisa", "Daniel", "Elizabeth", "Kevin"};

Instance source code Download http://download.csdn.net/detail/hantangsongming/8336075

Android-pulltorefresh drop-down Refresh library basic usage