Android hands-on tutorial 43rd pull load and drop-Pull refresh _android

ListView Drop-down Refresh is very common, many open source framework can do this, of course, can also be achieved. This case is based on Xlistview.

Layout:

<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 " > 
 
 <me.maxwin.view.xlistview 
  android:id= "@+id/xlv" 
  android:layout_width= "Match_parent" 
  android:layout_height= "Match_parent"/> 
 

Code for the main activity:

Package Com.itydl.xlistviewdemo; 
Import Java.text.SimpleDateFormat; 
Import java.util.ArrayList; 
Import Java.util.Date; 
 
Import java.util.List; 
Import Me.maxwin.view.XListView; 
Import Me.maxwin.view.XListView.IXListViewListener; 
Import android.app.Activity; 
Import Android.graphics.Color; 
Import Android.os.Bundle; 
Import Android.os.Handler; 
Import Android.os.Message; 
Import Android.os.SystemClock; 
Import Android.view.View; 
Import Android.view.ViewGroup; 
Import Android.widget.BaseAdapter; 
 
Import Android.widget.TextView; 
 public class Mainactivity extends activity {private Xlistview Mxlistview; 
 list<string> datas = new arraylist<string> (); 
 Private Myadapter adapter; Private Boolean isloadmore;//whether the markup for more data is being loaded private long pretime;//the current system time millisecond value that was refreshed on the previous refresh private Handler Handler = new Han 
    Dler () {public void Handlemessage (Android.os.Message msg) {if (Isloadmore) {//message is a pull load more initdatas (); 
    Isloadmore = false; Refresh complete, turn off pull load effectFruit Mxlistview.stoploadmore (); 
    }else{//message is Drop-down refresh Datas.clear (); 
    Initdatas (); 
   Refresh finished, turn off the Drop-down refresh Effect Mxlistview.stoprefresh (); 
  }//Refresh ListView adapter.notifydatasetchanged (); 
 }; 
 
 }; 
  @Override protected void OnCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate); 
  Setcontentview (R.layout.activity_main); 
  Initdatas (); 
  Mxlistview = (Xlistview) Findviewbyid (R.ID.XLV); 
  Set Adapter to ListView adapter = new Myadapter (); 
  Mxlistview.setadapter (adapter); 
 Initlistener (); 
   
  private void Initlistener () {//settings can be pulled down to refresh, the default is True Mxlistview.setpullrefreshenable (true); 
   
  The settings can be pulled up to load, the default is False mxlistview.setpullloadenable (true); Mxlistview.setxlistviewlistener (New Ixlistviewlistener () {@Override public void Onrefresh () {//dropdown refresh, solid 
    Inter-send handler//Send an empty message, delay two seconds after informing refresh Data handler.sendmessagedelayed (Message.obtain (), 2000); Add the last Refresh time: if (pretime!= 0) {Mxlistview.setRefreshtime (RefreshData (pretime)); 
   } pretime = System.currenttimemillis (); Private String RefreshData (long pretime) {return new SimpleDateFormat ("Yyyy-mm-dd HH:mm:ss"). Format (New Date 
   (Pretime)); 
    The @Override public void Onloadmore () {//tag is loading more, sending handler Isloadmore = true; 
   Handler.sendmessagedelayed (Message.obtain (), 2000); 
 } 
  });  /** Analog network data/private void Initdatas () {//The actual development should be child thread execution for (int i = 0; i < i++) {Datas.add ("I am the first" + 
  i + "strip data"); 
    } private class Myadapter extends baseadapter{@Override public int GetCount () {if (datas!= null) { 
   return Datas.size (); 
  return 0; 
   @Override public Object getitem (int position) {if (datas!= null) {return datas.get (position); 
  return null; 
  @Override public long getitemid (int position) {return position; @Override public View getview (int position, View Convertview, VIewgroup parent) {//Simulate item is TextView TextView TextView = new TextView (mainactivity.this); 
   Textview.settext (GetItem (position) + ""); 
   Textview.settextcolor (Color.green); 
  return textView;  } 
 } 
}

Just a few lines of code have done the main function, run as follows:

Like friends can pay attention to me Oh, this column will not regularly update the simple and interesting Android small text