Related code for Android development----ListView Refresh

Mainactity

public class Mainactivity extends Listactivity {
static final int menu_manual_refresh = 0;
static final int menu_disable_scroll = 1;
static final int menu_set_mode = 2;
static final int menu_demo = 3;
int index=1;

Private Pulltorefreshlistview Mpullrefreshlistview;

@Override
protected void OnCreate (Bundle savedinstancestate) {
Super.oncreate (savedinstancestate);
Setcontentview (R.layout.activity_main);
Mpullrefreshlistview = (Pulltorefreshlistview) Findviewbyid (r.id.pull_refresh_list);//1
New Getdatatask (). Execute ("http://api.expoon.com/AppNews/getNewsList/type/1/p/" +index);
Set a listener to is invoked when the list should is refreshed. Drop-down refresh processing
Mpullrefreshlistview.setonrefreshlistener (New onrefreshlistener<listview> () {//2
@Override
public 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);//3. Refresh Interface processing agent, display new time

Do work to refresh the list here.

New Getdatatask (). Execute ("http://api.expoon.com/AppNews/getNewsList/type/1/p/" +index); 4. Perform a custom asynctask to refresh the data request
}
});

Add an End-of-list listener//5. Setting up pull-up loading processing
Mpullrefreshlistview.setonlastitemvisiblelistener (New Onlastitemvisiblelistener () {

@Override
public void onlastitemvisible () {

New Getdatatask (). Execute ("http://api.expoon.com/AppNews/getNewsList/type/1/p/" +index);
Toast.maketext (Mainactivity.this, "Loading", 1). Show ();
}
});


}


Private class Getdatatask extends Asynctask<string, Integer, string> {

@Override
Protected string Doinbackground (String ... params) {
Simulates a background job.
String json = NULL;
try {

Thread.Sleep (4000);
HttpClient httpclient=new defaulthttpclient ();
HttpGet httpget=new HttpGet (params[0]);
try {
HttpResponse execute = httpclient.execute (httpget);
int statusCode = Execute.getstatusline (). Getstatuscode ();
if (statuscode==200) {
httpentity entity = execute.getentity ();
JSON = entityutils.tostring (entity);
LOG.I ("AAA", JSON);
}
} catch (Clientprotocolexception e) {
TODO auto-generated Catch block
E.printstacktrace ();
} catch (IOException e) {
TODO auto-generated Catch block
E.printstacktrace ();
}

} catch (Interruptedexception e) {}


return JSON;
}

@Override
protected void OnPostExecute (String result) {
Super.onpostexecute (result);
Gson gson=new Gson ();
Final List_news Fromjson = Gson.fromjson (Result,list_news.class);
LOG.I ("BBB", Fromjson.getdata (). toString ());
Mlistitems.addfirst ("Added after Refresh ...");
Myadapter adapter=new Myadapter (Fromjson.getdata (), Getapplicationcontext ());
ListView Actuallistview = Mpullrefreshlistview.getrefreshableview ();
Actuallistview.setadapter (adapter);

Actuallistview.setonitemclicklistener (New Onitemclicklistener () {

@Override
public void Onitemclick (adapterview<?> arg0, View arg1,
int arg2, long arg3) {
TODO auto-generated Method Stub
Intent intent=new Intent (mainactivity.this,detailsactivity.class);
Intent.putextra ("List", Fromjson.getdata (). Get (ARG2));
StartActivity (Intent);
}
});
Adapter.notifydatasetchanged ();
Index= index+1;
Call Onrefreshcomplete when the list has been refreshed.
Mpullrefreshlistview.onrefreshcomplete ();
}
}

}

Detailsactivity

public class Detailsactivity extends Activity {

@Override
protected void OnCreate (Bundle savedinstancestate) {
TODO auto-generated Method Stub
Super.oncreate (savedinstancestate);
Setcontentview (R.layout.show_detail);
Intent Intent = Getintent ();
News news= (News) Intent.getserializableextra ("list");
ImageView imageview= (ImageView) Findviewbyid (r.id.image_show);
TextView textview= (TextView) Findviewbyid (r.id.text_show);
Textview.settext (News.getnews_title ());
Bitmaputils bitmaputils=new bitmaputils (Getapplicationcontext ());
Bitmaputils.display (ImageView, News.getpic_url ());
}

}

Baseadapter

public class Myadapter extends Baseadapter {
List<news> list;
Context context;
Public Myadapter (list<news> List, context context) {
Super ();
This.list = list;
This.context = context;
}
@Override
public int GetCount () {
TODO auto-generated Method Stub
return List.size ();
}



@Override
Public Object getItem (int position) {
TODO auto-generated Method Stub
return List.get (position);
}

@Override
public long getitemid (int position) {
TODO auto-generated Method Stub
return position;
}

@Override
Public View GetView (int position, View Convertview, ViewGroup parent) {
TODO auto-generated Method Stub
Viewholder Viewholder;
if (convertview==null) {
Viewholder=new Viewholder ();
Convertview=layoutinflater.from (context). Inflate (R.layout.list_view, NULL);
viewholder.textview= (TextView) Convertview.findviewbyid (R.id.text);
viewholder.imageview= (ImageView) Convertview.findviewbyid (r.id.image);
Convertview.settag (Viewholder);
}else{
Viewholder= (Viewholder) Convertview.gettag ();
}
ViewHolder.textView.setText (List.get (position). Getnews_title ());
Bitmaputils bitmaputils=new bitmaputils (context);
Bitmaputils.display (Viewholder.imageview,list.get (position). Getpic_url ());
return convertview;
}
Class viewholder{
TextView TextView;
ImageView ImageView;
}
}

Sub-Assembly class

public class List_news {
List<news> data;

Public list<news> GetData () {
return data;
}

public void SetData (list<news> data) {
This.data = data;
}

}

Layout page Main

<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"
tools:context= "Com.bwie.sx.MainActivity" >
<com.handmark.pulltorefresh.library.pulltorefreshlistview
Android:id= "@+id/pull_refresh_list"
Android:layout_width= "Fill_parent"
android:layout_height= "Fill_parent"
Android:cachecolorhint= "#00000000"
Android:divider= "#19000000"
android:dividerheight= "4DP"
Android:fadingedge= "None"
Android:fastscrollenabled= "false"
Android:footerdividersenabled= "false"
Android:headerdividersenabled= "false"
Android:smoothscrollbar= "true"/>


</RelativeLayout>

public class News implements serializable{
String News_title;
String Pic_url;
Public String Getnews_title () {
return news_title;
}
public void Setnews_title (String news_title) {
This.news_title = News_title;
}
Public String Getpic_url () {
return pic_url;
}
public void Setpic_url (String pic_url) {
This.pic_url = Pic_url;
}

}

Related code for Android development----ListView Refresh