java - the listview is not working android not null pointer exception -

i trying display data website in listview not showing data. think there error in `asynctask,

i want view 2 text json file getting.

help me learn mistake. tried using ipadress , domainname nothing works , not exception

here code

package com.itdc.shashank.avdeal1;  import android.app.activity; import android.app.progressdialog; import android.os.asynctask; import android.os.bundle; import android.util.log; import android.view.menu; import android.widget.listview; import android.widget.toast;  import org.apache.http.httpentity; import org.apache.http.httpresponse; import org.apache.http.client.clientprotocolexception; import org.apache.http.client.httpclient; import org.apache.http.client.methods.httpget; import org.apache.http.impl.client.defaulthttpclient; import org.apache.http.util.entityutils; import org.json.jsonarray; import org.json.jsonexception; import org.json.jsonobject;  import java.io.ioexception; import java.util.arraylist;   public class itemview extends activity {     arraylist<item> list1;     actoradapter adp;     @override     protected void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         setcontentview(r.layout.activity_item_view);         list1=new arraylist<item>();         log.d("hello", "notworking");         new jsonasynctask().execute("http://avdeal.in/get_all_products.php");       }      public class jsonasynctask extends asynctask<string,void, boolean>{         progressdialog pd;         protected void onpreexecute(){              super.onpreexecute();             pd=new progressdialog(itemview.this);             pd.setmessage("please wait");             pd.settitle("connecting");             pd.show();             pd.setcancelable(false);         }         @override         protected boolean doinbackground(string... urls) {             try {                 httpget httppost=new httpget(urls[0]);                 httpclient httpclient=new defaulthttpclient();                 httpresponse response=httpclient.execute(httppost);                  int status=response.getstatusline().getstatuscode();                 if (status>0)                 {                     httpentity entity=response.getentity();                     string data= entityutils.tostring(entity);                      jsonobject jsono=new jsonobject(data);                     jsonarray jsonarray=jsono.getjsonarray("item");                 (int i=0;i<jsonarray.length();i++)                 {                     jsonobject object=jsonarray.getjsonobject(i);                     item items=new item(object.getstring("product_title"),object.getstring("product_price"));                    // item.setname(object.getstring("product_title"));                   //  item.setprice(object.getstring("product_price"));                     list1.add(items);                  }                 }             } catch (clientprotocolexception e) {                 e.printstacktrace();             } catch (ioexception e) {                 e.printstacktrace();             } catch (jsonexception e) {                 e.printstacktrace();             }              return true;         }          protected void onpostexecute(boolean result){             pd.dismiss();              adp.notifydatasetchanged();             if (result==false)                 toast.maketext(getapplicationcontext(), "unable fetch data", toast.length_short).show();             listview lv= (listview) findviewbyid(r.id.list);             adp=new actoradapter(getapplicationcontext(),r.layout.listview, list1);             lv.setadapter(adp);         }     }      @override     public boolean oncreateoptionsmenu(menu menu) {         // inflate menu; adds items action bar if present.          return true;     }     } 

this logcat when use webaddress website working

07-23 20:37:09.008  13927-14195/com.itdc.shashank.avdeal1 i/system.out﹕ [cds][dns]unable resolve host "www.avdeal.in": no address associated hostname 07-23 20:37:09.010  13927-14195/com.itdc.shashank.avdeal1 w/system.err﹕ java.net.unknownhostexception: unable resolve host "www.avdeal.in": no address associated hostname 07-23 20:37:09.019  13927-14195/com.itdc.shashank.avdeal1 w/system.err﹕ @ java.net.inetaddress.lookuphostbyname(inetaddress.java:439) 07-23 20:37:09.019  13927-14195/com.itdc.shashank.avdeal1 w/system.err﹕ @ java.net.inetaddress.getallbynameimpl(inetaddress.java:236) 07-23 20:37:09.020  13927-14195/com.itdc.shashank.avdeal1 w/system.err﹕ @ java.net.inetaddress.getallbyname(inetaddress.java:214) 07-23 20:37:09.020  13927-14195/com.itdc.shashank.avdeal1 w/system.err﹕ @ org.apache.http.impl.conn.defaultclientconnectionoperator.openconnection(defaultclientconnectionoperator.java:137) 07-23 20:37:09.020  13927-14195/com.itdc.shashank.avdeal1 w/system.err﹕ @ org.apache.http.impl.conn.abstractpoolentry.open(abstractpoolentry.java:164) 07-23 20:37:09.020  13927-14195/com.itdc.shashank.avdeal1 w/system.err﹕ @ org.apache.http.impl.conn.abstractpooledconnadapter.open(abstractpooledconnadapter.java:119) 07-23 20:37:09.021  13927-14195/com.itdc.shashank.avdeal1 w/system.err﹕ @ org.apache.http.impl.client.defaultrequestdirector.execute(defaultrequestdirector.java:365) 07-23 20:37:09.021  13927-14195/com.itdc.shashank.avdeal1 w/system.err﹕ @ org.apache.http.impl.client.abstracthttpclient.execute(abstracthttpclient.java:555) 07-23 20:37:09.022  13927-14195/com.itdc.shashank.avdeal1 w/system.err﹕ @ org.apache.http.impl.client.abstracthttpclient.execute(abstracthttpclient.java:487) 07-23 20:37:09.022  13927-14195/com.itdc.shashank.avdeal1 w/system.err﹕ @ org.apache.http.impl.client.abstracthttpclient.execute(abstracthttpclient.java:465) 07-23 20:37:09.022  13927-14195/com.itdc.shashank.avdeal1 w/system.err﹕ @ com.itdc.shashank.avdeal1.itemview$jsonasynctask.doinbackground(itemview.java:57) 07-23 20:37:09.023  13927-14195/com.itdc.shashank.avdeal1 w/system.err﹕ @ com.itdc.shashank.avdeal1.itemview$jsonasynctask.doinbackground(itemview.java:41) 07-23 20:37:09.024  13927-14195/com.itdc.shashank.avdeal1 w/system.err﹕ @ android.os.asynctask$2.call(asynctask.java:287) 07-23 20:37:09.024  13927-14195/com.itdc.shashank.avdeal1 w/system.err﹕ @ java.util.concurrent.futuretask.run(futuretask.java:234) 07-23 20:37:09.025  13927-14195/com.itdc.shashank.avdeal1 w/system.err﹕ @ android.os.asynctask$serialexecutor$1.run(asynctask.java:230) 07-23 20:37:09.025  13927-14195/com.itdc.shashank.avdeal1 w/system.err﹕ @ java.util.concurrent.threadpoolexecutor.runworker(threadpoolexecutor.java:1080) 07-23 20:37:09.026  13927-14195/com.itdc.shashank.avdeal1 w/system.err﹕ @ java.util.concurrent.threadpoolexecutor$worker.run(threadpoolexecutor.java:573) 07-23 20:37:09.026  13927-14195/com.itdc.shashank.avdeal1 w/system.err﹕ @ java.lang.thread.run(thread.java:838) 07-23 20:37:09.027  13927-14195/com.itdc.shashank.avdeal1 w/system.err﹕ caused by: libcore.io.gaiexception: getaddrinfo failed: eai_nodata (no address associated hostname) 07-23 20:37:09.029  13927-14195/com.itdc.shashank.avdeal1 w/system.err﹕ @ libcore.io.posix.getaddrinfo(native method) 07-23 20:37:09.029  13927-14195/com.itdc.shashank.avdeal1 w/system.err﹕ @ libcore.io.forwardingos.getaddrinfo(forwardingos.java:59) 07-23 20:37:09.030  13927-14195/com.itdc.shashank.avdeal1 w/system.err﹕ @ java.net.inetaddress.lookuphostbyname(inetaddress.java:405) 07-23 20:37:09.031  13927-14195/com.itdc.shashank.avdeal1 w/system.err﹕ ... 17 more 07-23 20:37:09.031  13927-14195/com.itdc.shashank.avdeal1 w/system.err﹕ caused by: libcore.io.errnoexception: getaddrinfo failed: etimedout (connection timed out) 07-23 20:37:09.033  13927-14195/com.itdc.shashank.avdeal1 w/system.err﹕ ... 20 more 

i guess issue related url http://108.170.10.163/get_all_products.php. check this. url showing 404(page not found) error.

edit:

as per comments @selvin nullpointerexception too.

you need add adp.notifydatasetchanged() after create adapter. means need this.

 adp=new actoradapter(getapplicationcontext(),r.layout.listview, list1);  adp.notifydatasetchanged();