Android Development----Pullrefreshlibrary Pull-up loading related code

Mainactivity

public class Mainactivity extends Activity {

Private String URL = "Http://apis.juhe.cn/goodbook/catalog?key=9d6ef8c31647a206e05fcaff70527182&dtype=xml";
Private list<xmlarray> List;
Private ListView LV;
Define a variable to identify whether to exit
Achieve two clicks to exit
private static Boolean isexit = false;
private static final String TAG = MainActivity.class.getSimpleName ();
private static Handler Mhandler = new Handler () {

@Override
Public void Handlemessage (Message msg) {
super.handlemessage (msg);
isexit = false;
        }
    };

@Override
protected void OnCreate (Bundle savedinstancestate) {
Super.oncreate (savedinstancestate);
Setcontentview (R.layout.activity_main);
LV = (ListView) Findviewbyid (R.id.lv_main);
Httputils httputils = new Httputils ();
Httputils.send (httpmethod.get, URL, new requestcallback<string> () {

@Override
public void OnFailure (HttpException arg0, String arg1) {
TODO auto-generated Method Stub
LOG.I ("TAG", "request Failed");
}

@Override
public void onsuccess (responseinfo<string> arg0) {
TODO auto-generated Method Stub
LOG.I ("TAG", arg0.result.toString ());
XStream stream = new XStream ();
Stream.processannotations (Xmlroot.class);
XmlRoot xroot = (xmlroot) stream.fromxml (Arg0.result);
List = Xroot.getresult (). GetItem ();
LOG.I ("TAG", list.tostring ());
Lv.setadapter (New XMLAdapter (list, Getapplicationcontext ()));
Lv.setonitemclicklistener (New Onitemclicklistener () {

@Override
public void Onitemclick (adapterview<?> parent, view view,
int position, long ID) {
TODO auto-generated Method Stub
Intent Intent = new Intent (Mainactivity.this,
Itemactivitytwo.class);
Intent.putextra ("Lsid", list.get (position). GetId ());
StartActivity (Intent);
}
});
}
});

}

//Override onkeydown Method
@Override
Public boolean onKeyDown (int keycode, keyevent event) {
if (keycode = = keyevent.keycode_back) {
exit ();
return true;
        }
return Super.onkeydown (KeyCode, event);
    }

private void Exit () {
if (!isexit) {
isexit = true;
Toast.maketext (Getapplicationcontext (), "Press the back key again to exit the program",
toast.length_short). Show ();
//Use handler delay to send Change status information
//Time 2s
mhandler.sendemptymessagedelayed (0, +);
} else {

log.e (TAG, "Exit Application");

this.finish ();
        }
}

Itemactivity class

public class Itemactivitytwo extends Activity {
private int index = 0;
Private String xmlid;
Private list<jsonarray> List;
Private GridView GridView;
Private Jsonadapter adapter;
Private Pulltorefreshgridview Mpullrefreshgridview;

@SuppressWarnings ({"Unchecked", "Rawtypes"})
@Override
protected void OnCreate (Bundle savedinstancestate) {
TODO auto-generated Method Stub
Super.oncreate (savedinstancestate);
Setcontentview (r.layout.itemactivity);

Intent Intent = Getintent ();
xmlid = Intent.getstringextra ("Lsid");
//Get Pulltorefreshgridview
Mpullrefreshgridview = (pulltorefreshgridview) Findviewbyid (R.id.pull_refresh_grid);
GridView = Mpullrefreshgridview.getrefreshableview ();
gethttp ();
//Implement pull-up refresh with pull-down loading
Mpullrefreshgridview.setonrefreshlistener (New OnRefreshListener2 () {

@SuppressWarnings ("Rawtypes")
@Override
Public void Onpulldowntorefresh (Pulltorefreshbase refreshview) {
gethttp ();
            }

@SuppressWarnings ("Rawtypes")
@Override
Public void Onpulluptorefresh (Pulltorefreshbase refreshview) {
gethttp ();
            }

        });

    }

private void Gethttp () {
TODO auto-generated Method Stub
String url = "Http://apis.juhe.cn/goodbook/query?key=9d6ef8c31647a206e05fcaff70527182&catalog_id="
+ xmlid + "&pn=5&rn=" + index + "";
Httputils httputils = new Httputils ();
Httputils.send (httpmethod.post, URL, new requestcallback<string> () {

@Override
public void OnFailure (HttpException arg0, String arg1) {
TODO auto-generated Method Stub
LOG.I ("TAG", "request Failed");
}

@Override
public void onsuccess (responseinfo<string> arg0) {
TODO auto-generated Method Stub
Gson parsing
Gson Gson = new Gson ();
Jsonresult Fromjson = Gson.fromjson (Arg0.result,
Jsonresult.class);
List = Fromjson.getresult (). GetData ();
LOG.I ("TAG", list.tostring ());
adapter = new Jsonadapter (list, getapplicationcontext ());
Gridview.setadapter (adapter);
index = index++;
//Adapter Refresh
adapter.notifydatasetchanged ();
Mpullrefreshgridview.onrefreshcomplete ();
}
});
}

}

Customizing the application implementation to load a circular picture

public class Myapliation extends application {

@Override
public void OnCreate () {
TODO auto-generated Method Stub
Super.oncreate ();
System of
Imageloaderconfiguration configuration = imageloaderconfiguration
. Createdefault (Getapplicationcontext ());
Imageloader.getinstance (). init (configuration);

}

public static Displayimageoptions GetOptions () {

Displayimageoptions displayimageoptions = new Displayimageoptions.builder ()
. Displayer (new Roundedbitmapdisplayer). Build ();

return displayimageoptions;

}
}

Adapter Loading Pictures

}

Imageloader.getinstance (). DisplayImage (List.get (position). Getimg (),
Vh.iamge, Myapliation.getoptions ());
Bitmap Loading pictures
Bitmaputils bitmaputils = new Bitmaputils (context);
Bitmaputils.display (Vh.iamge, list.get (position). GETIMG ());

Android Development----Pullrefreshlibrary Pull-up loading related code