Android Development ListView List Refresh and load more implementations _android

This example describes the Android development ListView list Refresh and load more implementations. Share to everyone for your reference. Specifically as follows:

Up and down pull implementation refreshes and loads more listview as follows:

Package com.sin.android.ui; 
Import Android.content.Context; 
Import Android.util.AttributeSet; 
Import android.view.Gravity; 
Import android.view.MotionEvent; 
Import Android.view.View; 
Import Android.widget.AbsListView; 
Import Android.widget.AbsListView.OnScrollListener; 
Import Android.widget.LinearLayout; 
Import Android.widget.ListView; 
Import Android.widget.ProgressBar; 
Import Android.widget.TextView; /** * Dynamic refresh and load data ListView * @author Robintang * * */public class Dynamiclistview extends ListView implements Onscrol  
   Llistener {/** * listener * Monitor Control refresh or load more events * All entry events will have an offset, that is, position should be minus 1 is the entry in your adapter * @author Robintang  * * */public interface Dynamiclistviewlistener {/** * * * * @param dynamiclistview * @param When Isrefresh is true, it represents a refresh, which, when false, represents a load of more * @return true: Refresh or load more actions complete, refresh or load more animations automatically disappear false: Refresh or load more for completion, need to be completed in data loading To invoke the control's Donerefresh () or Donemore () method/public Boolean Onrefreshormore (Dynamiclistview Dynamiclistview, Boolean Isrefresh); /** * State control (Statusview, list header and bottom) State enumeration * @author Robintang */enum Refreshstatus {none, Norm Al, Willrefresh, refreshing}/** * State control * @author Robintang * * * * */class Statusview extends 
    Layout {public int height; 
    public int width; 
    Private ProgressBar ProgressBar = null; 
    Private TextView TextView = null; 
    Private Refreshstatus refreshstatus = Refreshstatus.none; 
    Private String normalstring = "Drop-down Refresh"; 
    Private String willrefreshstring = "Release Refresh"; 
    Private String refreshingstring = "refreshing"; 
      Public Statusview (context, AttributeSet attrs) {Super (context, attrs); 
    Initthis (context); 
      Public Statusview {Super (context); 
    Initthis (context); 
      private void Initthis (context context) {this.setorientation (linearlayout.horizontal); This.setgravity (Gravity.center_horizontal | GRavity. 
      center_vertical); 
      ProgressBar = new ProgressBar (context); 
      Progressbar.setlayoutparams (New Linearlayout.layoutparams (30, 30)); 
      TextView = new TextView (context); 
      Textview.setpadding (5, 0, 0, 0); 
      This.addview (ProgressBar); 
      This.addview (TextView); 
      int w = View.MeasureSpec.makeMeasureSpec (0, View.MeasureSpec.UNSPECIFIED); 
      int h = View.MeasureSpec.makeMeasureSpec (0, View.MeasureSpec.UNSPECIFIED); 
      This.measure (W, h); 
      Height = this.getmeasuredheight (); 
      width = This.getmeasuredwidth (); 
    This.setrefreshstatus (Refreshstatus.normal); 
    Public Refreshstatus Getrefreshstatus () {return refreshstatus; 
        public void Setrefreshstatus (Refreshstatus refreshstatus) {if (this.refreshstatus!= refreshstatus) { 
        This.refreshstatus = Refreshstatus; 
        if (Refreshstatus = = refreshstatus.refreshing) {this.progressBar.setVisibility (view.visible); 
       } else{this.progressBar.setVisibility (View.gone); 
        } refreshstatusstring (); 
      This.invalidate (); } private void Refreshstatusstring () {switch (refreshstatus) {case NORMAL:TEXTVIEW.S 
        Ettext (normalstring); 
        Progressbar.setprogress (0); 
      Break 
        Case Willrefresh:textView.setText (willrefreshstring); 
      Break 
        Case Refreshing:textView.setText (refreshingstring); 
      Break 
      Default:break; 
     }/** * Set state String * @param normalstring Normal String * @param a string that is refreshed (or loaded) after the release of Willrefreshstring * @param refreshingstring is refreshing (or loading) the string */public void setstatusstrings (string normalstring, String willrefres 
      Hstring, String refreshingstring) {this.normalstring = normalstring; 
      this.willrefreshstring = willrefreshstring; 
      this.refreshingstring = refreshingstring; This.refreshstatusstring (); 
  } private Statusview Refreshview; 
  Private Statusview Moreview; 
  private int itemflag =-1; 
  Private Boolean isrecorded = false; 
  private int DownY =-1; 
  Private final float Mintimestorefresh = 1.5f; 
  Private final static int item_flag_first = 1; 
  Private final static int item_flag_none = 0; 
  Private final static int item_flag_last =-1; 
  Two listeners private Dynamiclistviewlistener Onrefreshlistener; 
  Private Dynamiclistviewlistener Onmorelistener; 
  Whether to automatically load more private Boolean Domorewhenbottom = False when scrolling to the lower end; 
    Public Dynamiclistview (context, AttributeSet attrs, int defstyle) {Super (context, attrs, Defstyle); 
  Initthis (context); 
    Public Dynamiclistview (context, AttributeSet attrs) {Super (context, attrs); 
  Initthis (context); 
    Public Dynamiclistview {Super (context); 
  Initthis (context); } private void Initthis {Refreshview = new Statusview (COntext); 
    Moreview = new Statusview (context); 
    Refreshview.setstatusstrings ("Continue drop-down Refresh Data ...", "Refresh data after release ...", "refreshing data ..."); 
    Moreview.setstatusstrings ("Continue pull loading data ...", "Load Data ...", "Loading Data ..."); 
    This.addheaderview (Refreshview, NULL, FALSE); 
    This.addfooterview (Moreview, NULL, FALSE); 
    This.setonscrolllistener (this); 
    Donerefresh (); 
  Donemore (); 
  }//Listener operation Public Dynamiclistviewlistener Getonrefreshlistener () {return onrefreshlistener; } public void Setonrefreshlistener (Dynamiclistviewlistener onrefreshlistener) {This.onrefreshlistener = OnRefresh 
  Listener; 
  Public Dynamiclistviewlistener Getonmorelistener () {return onmorelistener; 
  public void Setonmorelistener (Dynamiclistviewlistener onmorelistener) {this.onmorelistener = Onmorelistener; 
  //Set public boolean Isdomorewhenbottom () {return domorewhenbottom; } public void Setdomorewhenbottom (Boolean domorewhenbottom) {THIS.DOMOREWHEnbottom = Domorewhenbottom; @Override public void Onscroll (abslistview l, int t, int oldl, int count) {//log ("%d%d%d", T, OLDL, Count 
    ); 
    if (t = = 0) Itemflag = Item_flag_first; 
      else if ((t + oldl) = = count) {Itemflag = Item_flag_last; if (domorewhenbottom && onmorelistener!= null && moreview.getrefreshstatus ()!= 
      refreshstatus.refreshing) {domore (); 
} else {itemflag = Item_flag_none; 
    isrecorded = false; @Override public void onscrollstatechanged (Abslistview arg0, int arg1) {} @Override public boolean Ontouchevent (motionevent ev) {switch (ev.getaction ()) {case MotionEvent.ACTION_DOWN:if (isrecorded = = False && (Itemflag = = Item_flag_first && onrefreshlistener!= null && Refreshview.getrefreshstatus () = = Refreshstatus.normal | | Itemflag = = Item_flag_last && onmorelistener!= null && MorevieW.getrefreshstatus () = = Refreshstatus.normal)) {DownY = (int) ev.gety (0); 
Isrecorded = true; 
      Log ("Press, Record:%d flag:%d", DownY, Itemflag); 
    } break; 
      Case MOTIONEVENT.ACTION_UP: {isrecorded = false; if (Onrefreshlistener!= null && refreshview.getrefreshstatus () = = Refreshstatus.willrefresh) {Dorefresh 
      (); else if (refreshview.getrefreshstatus () = = Refreshstatus.normal) {refreshview.setpadding (0,-1 * refreshView.h 
      Eight, 0, 0); } if (Onmorelistener!= null && moreview.getrefreshstatus () = = Refreshstatus.willrefresh) {Domore 
      (); else if (moreview.getrefreshstatus () = = Refreshstatus.normal) {moreview.setpadding (0, 0, 0,-1 * Moreview.heig 
      HT); 
    } break; Case Motionevent.action_move: {if (isrecorded = = False && (Itemflag = = Item_flag_first && o Nrefreshlistener!= null && Refreshview.getrefreshStatus () = = Refreshstatus.normal | | Itemflag = = Item_flag_last && onmorelistener!= null && moreview.getrefreshstatus () = = 
        Refreshstatus.normal)) {DownY = (int) ev.gety (0); 
Isrecorded = true; 
      Log ("Press, Record:%d flag:%d", DownY, Itemflag); 
        else if (isrecorded) {int nowy = (int) ev.gety (0); 
        int offset = Nowy-downy; 
          if (Offset > 0 && itemflag = item_flag_first) {//dropdown setselection (0); if (offset >= (Mintimestorefresh * refreshview.height)) {Refreshview.setrefreshstatus (Refreshstatus.willr 
          Efresh); 
          else {refreshview.setrefreshstatus (refreshstatus.normal); 
        Refreshview.setpadding (0,-1 * (Refreshview.height-offset), 0, 0); 
          else if (Itemflag = = Item_flag_last) {//Oberra setselection (This.getcount ()); if (offset <=-1 * (Mintimestorefresh * Moreview. Height)) {moreview.setrefreshstatus (Refreshstatus.willrefresh);
          else {moreview.setrefreshstatus (refreshstatus.normal);
        Moreview.setpadding (0, 0, 0,-1 * (Moreview.height + offset)); 
      }//Log ("Offset:%d", offset); 
    } break; 
    } Default:break; 
  return super.ontouchevent (EV); 
    /** * Start refreshing/private void Dorefresh () {//log ("Start refresh"); 
    Refreshview.setrefreshstatus (refreshstatus.refreshing); 
    Refreshview.setpadding (0, 0, 0, 0); 
  if (Onrefreshlistener.onrefreshormore (this, true)) Donerefresh (); 
    /** * Start loading more * * private void Domore () {//log ("load more"); 
    Moreview.setrefreshstatus (refreshstatus.refreshing); 
    Moreview.setpadding (0, 0, 0, 0); 
  if (Onmorelistener.onrefreshormore (this, false)) Donemore (); 
    Called after the/** * Refresh is completed, the animation for canceling the refresh/public void Donerefresh () {//log ("Refresh complete!"); RefreshvIew.setrefreshstatus (Refreshstatus.normal); 
  Refreshview.setpadding (0,-1 * refreshview.height, 0, 0); 
    /** * Load more completed after calling to cancel loading more animations/public void Donemore () {//log ("Load complete!"); 
    Moreview.setrefreshstatus (Refreshstatus.normal); 
  Moreview.setpadding (0, 0, 0,-1 * moreview.height); /** * Get refreshed Status * @return General will refresh refresh complete/public refreshstatus Getrefreshstatus () {return Refreshvi 
  Ew.getrefreshstatus (); /** * Get load more state * @return typically will load completion of load/public refreshstatus Getmorestatus () {return MOREVIEW.G 
  Etrefreshstatus (); 
}//private void log (Object obj) {//log ("%s", obj.tostring ()); }///private void log (String format, Object ... args) {//LOG.I ("Dynamiclistview", String.Format (format, args)) 
; 

 // } 
}

Use Example:

Package com.sin.android.ui; 
Import java.util.ArrayList; 
Import Java.util.Date; 
Import Android.annotation.SuppressLint; 
Import android.app.Activity; 
Import Android.os.Bundle; 
Import Android.os.Handler; 
Import Android.os.Message; 
Import Android.util.Log; 
Import Android.view.View; 
Import Android.widget.AdapterView; 
Import Android.widget.AdapterView.OnItemClickListener; 
Import Android.widget.ArrayAdapter; 
Import Android.widget.Toast; 
Import Com.sin.android.ui.DynamicListView.DynamicListViewListener; @SuppressLint ("Handlerleak") public class Mainactivity extends activity implements Dynamiclistviewlistener {DYNAMICLI 
  Stview ListView; 
  Arraylist<string> data; 
  Arrayadapter<string> adapter; Used to refresh control state Handler Handler = new Handler () {@Override public void Handlemessage (msg) {if (M 
        Sg.what = = 0) {adapter.notifydatasetchanged (); 
        Listview.donerefresh (); Toast.maketext (Mainactivity.this, "New Load" +msg.arg1+ "Piece of data!", Toast.length_long). Show (); 
        else if (Msg.what = 1) {adapter.notifydatasetchanged (); 
      Listview.donemore (); 
      else {super.handlemessage (msg); 
  } 
    } 
  }; 
    @Override protected void OnCreate (Bundle savedinstancestate) {super.oncreate (savedinstancestate); 
    ListView = new Dynamiclistview (this); 
    Setcontentview (ListView); 
    data = new arraylist<string> (); 
    for (int i = 1; i < ++i) {Data.add ("raw data" + i); } adapter = new Arrayadapter<string> (this, Android. 
    R.layout.simple_expandable_list_item_1, data); 
    Listview.setadapter (adapter); Listview.setonitemclicklistener (New Onitemclicklistener () {@Override public void Onitemclick (adapterview&lt ;? 
      > arg0, View arg1, int arg2, long arg3) {log.i ("", Data.get (arg2-1)); 
    } 
    });  Listview.setdomorewhenbottom (FALSE); 
    Scroll to the lower end when you do not load more listview.setonrefreshlistener (this); LisTview.setonmorelistener (this);  @Override public boolean Onrefreshormore (Dynamiclistview Dynamiclistview, Boolean Isrefresh) {if (Isrefresh) {New Thread (new Runnable () {@Override public void run () {//Refresh Arraylis 
          t<string> temp = new arraylist<string> (); 
            for (int i = 0; i < 3; ++i) {temp.add (0, New Date (). toLocaleString ()); 
            try {thread.sleep (1000); 
            catch (Interruptedexception e) {e.printstacktrace (); 
          } synchronized (data) {data.addall (0, temp); 
          } message = new message (); 
          Message.what = 0; 
          MESSAGE.ARG1 = Temp.size (); 
        Handler.sendmessage (message); 
    }). Start (); 
          else {new Thread (new Runnable () {@Override public void run () {//Load more Arraylist< 
          string> temp = new arraylist<string> (); 
            for (int i = 0; i < 3; ++i) {Temp.add (New Date (). toLocaleString ()); 
            try {thread.sleep (1000); 
            catch (Interruptedexception e) {e.printstacktrace (); 
          } synchronized (data) {Data.addall (temp); 
        } handler.sendemptymessage (1); 
    }). Start (); 
  return false; 

 } 
}

Run the screenshot as follows:

I hope this article will help you with your Android program.