android - AsyncTask in Fragment not working and shows FATAL EXCEPTION: AsyncTask #1 -

the following code when run crashes app. calling in mainactivity. when run tells me:

fatal exception: asynctask #1 , directs me toward progressdialog , http response line

import android.app.fragment; import android.app.progressdialog; import android.os.asynctask; import android.os.bundle; import android.util.log; import android.view.layoutinflater; import android.view.view; import android.view.viewgroup; import android.widget.arrayadapter; import android.widget.edittext; import android.widget.listview;  import com.montel.senarivesselapp.model.showdatalist; import com.montel.senarivesselapp.model.vessel;  import org.apache.http.httpresponse; import org.apache.http.httpstatus; import org.apache.http.statusline; import org.apache.http.client.clientprotocolexception; import org.apache.http.client.httpresponseexception; import org.apache.http.client.methods.httpget; import org.apache.http.impl.client.defaulthttpclient; import org.json.jsonarray; import org.json.jsonexception; import org.json.jsonobject;  import java.io.bufferedreader; import java.io.bytearrayoutputstream; import java.io.ioexception; import java.util.arraylist;  public class showallfragment extends fragment {      //variables json query     private static final string name ="vessel_name";     private static final string etad="eta_date";     private static final string etat="eta_time";     private static final string etbd="etb_date";     private static final string etbt="etb_time";     private static final string shippingname="shipping_agent_name";     private static final string v1 = "vessels";     private static final string v2 = "vessel";       private arraylist<vessel> vlist = new arraylist<>();     private arrayadapter arrayadapter = null;     private listview listview = null;     private edittext et = null;     private showdatalist ssadapter = null;     private view rootview;      public showallfragment() {     }      @override     public view oncreateview(layoutinflater inflater, viewgroup container, bundle savedinstancestate) {          rootview = inflater.inflate(r.layout.fragment_showall, container, false);         setcontentview(r.layout.fragment_showall);         setretaininstance(true);           return rootview;     }      private void setcontentview(int fragment_showall) {      }      @override     public void onactivitycreated(bundle savedinstancestate) {         super.onactivitycreated(savedinstancestate);     }       //for getting json schedule server     class schedule extends asynctask<string, string, string> {         progressdialog loaddialog;          @override         protected void onpreexecute() {             super.onpreexecute();             //show loading dialog             loaddialog = new progressdialog(showallfragment.this);             loaddialog.setmessage("please wait....");             loaddialog.setcancelable(false);             loaddialog.show();          }           @override         protected string doinbackground(string... uri) {             bufferedreader input = null;             string data = null;              try {                  defaulthttpclient client = new defaulthttpclient();                  httpresponse response = client.execute(new httpget("http://"));                 statusline stline = response.getstatusline();                 if (stline.getstatuscode() == httpstatus.sc_ok) {                     bytearrayoutputstream out = new bytearrayoutputstream();                     response.getentity().writeto(out);                     data = out.tostring();                     out.close();                 } else {                     response.getentity().getcontent().close();                     throw new ioexception(stline.getreasonphrase());                 }             } catch (httpresponseexception he) {                 he.printstacktrace();             } catch (clientprotocolexception cpe) {                 cpe.printstacktrace();             } catch (ioexception e) {                 e.printstacktrace();             } {                 if (input != null) {                     try {                         input.close();                         return data;                     } catch (exception e) {                         system.out.println(e);                     }                 }             }             return data;         }     @override     protected void onpostexecute(string result) {         super.onpostexecute(result);         //fill vlist array         log.d("post execute", result.tostring());         loaddialog.dismiss();         if (result != null) {             try {                 jsonobject jo = new jsonobject(result);                 jsonarray vessels = jo.getjsonarray(v1);                  log.d("vessel log", vessels.tostring());                 vlist = new arraylist();                  (int = 0; < vessels.length(); i++) {                     jsonobject vv = vessels.getjsonobject(i);                     log.d("vessel name", vv.getjsonobject(v2).getstring(name));                      vlist.add(new vessel(vv.getjsonobject(v2).getstring(name),                             vv.getjsonobject(v2).getstring(etad),                             vv.getjsonobject(v2).getstring(etat),                             vv.getjsonobject(v2).getstring(etbd),                             vv.getjsonobject(v2).getstring(etbt),                                      vv.getjsonobject(v2).getstring(shippingname)));                  }               } catch (jsonexception e) {                 e.printstacktrace();             }          }          listview = (listview) rootview.findviewbyid(r.id.datashow);         listview.setadapter(arrayadapter);         ssadapter = new showdatalist(showallfragment.this , vlist);         listview.setadapter(ssadapter);     }        } } 

 securityexception: permission denied (missing internet permission 

so should request internet permission in projects androidmanifest.xml file. add on rigth place:

 <uses-permission android:name="android.permission.internet" />