java - not able to generate random no to access random api -

i'm trying build android app provides result based on users previous search history, i'm using google search api search result , reranking result based on history. unfortunately google search api gives 100 searches free generated 3 different api's using different id's when i'm using random no generator does't work. here code snippet

package com.aas.pase; import java.util.*; import java.io.ioexception; import java.net.urlencoder; import java.util.arraylist; import java.util.collections; import java.util.comparator; import java.util.random;  import org.apache.http.httpentity; import org.apache.http.httpresponse; 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 com.aas.pase.r; import com.aas.pase_db.link; import com.aas.pase_db.manipulatedb;   import android.app.activity; import android.app.progressdialog; import android.content.dialoginterface; import android.content.dialoginterface.oncancellistener; import android.content.intent; import android.net.uri; import android.os.asynctask; import android.os.bundle; import android.text.html; import android.util.log; import android.view.view; import android.view.view.onclicklistener; import android.view.viewgroup; import android.widget.baseadapter; import android.widget.edittext; import android.widget.listview; import android.widget.textview;  public class resultactivity extends activity {  arraylist<link> result = new arraylist<link>(); manipulatedb manidb;  edittext txtkword; listview lvresult; resultadapter ada = new resultadapter();  textview title; textview link; textview snippet;  int totalresults = 99;  // network variables... httpclient cli; httpget post; httpresponse res; httpentity resent; string keyword; string key; string strresult;  @override protected void oncreate(bundle savedinstancestate) {     // todo auto-generated method stub     super.oncreate(savedinstancestate);     setcontentview(r.layout.result);      manidb = new manipulatedb(this);      keyword = this.getintent().getextras().getstring("keyword");      txtkword = (edittext) this.findviewbyid(r.id.txtkeyword);     txtkword.settext(keyword);     txtkword.setselection(keyword.length());      lvresult = (listview) this.findviewbyid(r.id.lvresults);     lvresult.setadapter(ada);      fetchresulttask task = new fetchresulttask();     task.execute(); }  public void onsearch(view v) {     keyword = txtkword.gettext().tostring();     fetchresulttask task = new fetchresulttask();     task.execute(); }  public class fetchresulttask extends asynctask<void, integer, boolean> {     progressdialog pd;     private random generator;     @override     protected void onpreexecute()     {         // todo auto-generated method stub         result.clear();         pd = new progressdialog(resultactivity.this);          pd.setmessage("searching web...");         pd.setprogressstyle(progressdialog.style_spinner);         pd.setoncancellistener(new oncancellistener(){             @override             public void oncancel(dialoginterface arg0) {                 // todo auto-generated method stub                 cancel(false);             }         });          pd.show();     }      @override     protected boolean doinbackground(void... arg0) {         // todo auto-generated method stub         try{             cli = new defaulthttpclient();              keyword = urlencoder.encode(keyword);             key="aizasycmkn7vrofn66vknauvgrhjhn8qbv6kmhk";             /*random rand=new random();             switch(rand.nextint(3)+1){             case 1: key="aizasycmkn7vrofn66vknauvgrhjhn8qbv6kmhk";             break;             case 2: key="aizasydcjjrufniqhseakigachu0hwzf6s-n1e0";             break;             case 3: key="aizasyajtx5sqjrmkd9il9fbmbkhsip0ld5n1na";             }*/              post = new httpget("https://www.googleapis.com/customsearch/v1?q=" + keyword + "&"+ key +"&cx=001661526915081556349:glrhiznip8g&atl=json");             res = cli.execute(post);             resent = res.getentity();              strresult = entityutils.tostring(resent, "utf-8");             // getting json object link object             jsonobject main = new jsonobject(strresult);             jsonobject queries = main.getjsonobject("queries");             jsonarray nextpage = queries.getjsonarray("request");             int total = integer.parseint(nextpage.getjsonobject(0).getstring("totalresults"));             if(total < 100 )                 totalresults = total;             if(totalresults > 0)             {                 jsonarray items = main.getjsonarray("items");                 for(int = 0; < items.length(); i++)                 {                     jsonobject entry = items.getjsonobject(i);                     link temp = new link();                     temp.sethtmlsnippet(entry.getstring("htmlsnippet"));                     temp.sethtmltitle(entry.getstring("htmltitle"));                     temp.sethtmlurl(entry.getstring("htmlformattedurl"));                     temp.setlink(entry.getstring("link"));                     temp.settitle(entry.getstring("title"));                     result.add(temp);                 }                  this.publishprogress(1);                 // reading results 11 100...                 int loopcount = totalresults / 10;                 if((totalresults % 10) == 0)                     loopcount--;                 int curstart = 1;                 for(int j = 1; j <= loopcount; j++)                 {                     curstart += 10;                     post = new httpget("https://www.googleapis.com/customsearch/v1?q=" + keyword + "&"+ key +"&cx=001661526915081556349:glrhiznip8g&atl=json&start=" + curstart);                     res = cli.execute(post);                     resent = res.getentity();                     strresult = entityutils.tostring(resent, "utf-8");                     jsonobject inmain = new jsonobject(strresult);                     jsonarray initems = inmain.getjsonarray("items");                     for(int = 0; < initems.length(); i++)                     {                         jsonobject entry = initems.getjsonobject(i);                         link temp = new link();                         temp.sethtmlsnippet(entry.getstring("htmlsnippet"));                         temp.sethtmltitle(entry.getstring("htmltitle"));                         temp.sethtmlurl(entry.getstring("htmlformattedurl"));                         temp.setlink(entry.getstring("link"));                         temp.settitle(entry.getstring("title"));                         result.add(temp);                     }                 }                  this.publishprogress(2);                 // assigning clicks sorting results...                 for(link tmp : result)                     tmp.setclicks(manidb.getclicks(tmp.getlink()));                  // soring...                 collections.sort(result, new comparator<link>(){                     @override                     public int compare(link one, link two) {                         // todo auto-generated method stub                         return integer.signum(two.getclicks() - one.getclicks());                     }                 });                  return true;             }             return false;         }         catch(ioexception e){             e.printstacktrace();         }         catch(illegalstateexception e) {             e.printstacktrace();         }         catch (jsonexception e) {             e.printstacktrace();         }         return false;     }      @override     protected void onprogressupdate(integer... values) {         // todo auto-generated method stub         switch(values[0])         {             case 1:                 pd.setmessage("reading results");                 break;              case 2:                 pd.setmessage("arranging results");                 break;         }     }      public string getpageno(int startindex)     {         int n = startindex;         int sum = 0;         while (n > 0)         {             int p = n % 10;             sum = sum + p;             n = n / 10;         }         return integer.tostring(sum);     }      @override     protected void onpostexecute(boolean isok) {         // todo auto-generated method stub         if(!iscancelled())         {             pd.dismiss();             log.v("mani", "total: " + result.size());             if(isok)             {                 ada.notifydatasetchanged();                 lvresult.setselectionafterheaderview();             }             else                 commons.showtoast("unable results", true);         }     } }  public class resultadapter extends baseadapter {      @override     public int getcount() {         // todo auto-generated method stub         return result.size();     }      @override     public object getitem(int arg0) {         // todo auto-generated method stub         return null;     }      @override     public long getitemid(int arg0) {         // todo auto-generated method stub         return 0;     }      @override     public view getview(final int pos, view view, viewgroup vgrp) {         // todo auto-generated method stub         if(view == null)             view = getlayoutinflater().inflate(r.layout.result_item, null);          // adding results list...         title = (textview) view.findviewbyid(r.id.txtitemtitle);         link = (textview) view.findviewbyid(r.id.txtitemlink);         snippet = (textview) view.findviewbyid(r.id.txtitemsnippet);          link temp = result.get(pos);         title.settext(html.fromhtml(temp.gethtmltitle()));         link.settext(html.fromhtml(temp.gethtmlurl()));         snippet.settext(html.fromhtml(temp.gethtmlsnippet()));          title.setonclicklistener(new onclicklistener(){             @override             public void onclick(view view) {                 // todo auto-generated method stub                 link tmplink = result.get(pos);                 manidb.addclick(tmplink);                 intent browse = new intent(intent.action_view, uri.parse(tmplink.getlink()));                 startactivity(browse);             }         });         return view;     } } 

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