java - android.database.CursorIndexOutOfBoundsException....crash report -


i crash report error app. use imported sqlite database in assets folder. doing wrong? here's error user crash report:

android.database.cursorindexoutofboundsexception: index 0 requested, size of 0 @ android.database.abstractcursor.checkposition(abstractcursor.java:418) @ android.database.abstractwindowedcursor.checkposition(abstractwindowedcursor.java:136) @ android.database.abstractwindowedcursor.getstring(abstractwindowedcursor.java:50) @ rs.androidaplikacije.zastaveigradovi.kviz20hard.nextquestiongrad(kviz20hard.java:328) @ rs.androidaplikacije.zastaveigradovi.kviz20hard.access$1(kviz20hard.java:307) @ rs.androidaplikacije.zastaveigradovi.kviz20hard$2.run(kviz20hard.java:68) @ android.os.handler.handlecallback(handler.java:615) @ android.os.handler.dispatchmessage(handler.java:92) @ android.os.looper.loop(looper.java:137) @ android.app.activitythread.main(activitythread.java:4921) @ java.lang.reflect.method.invokenative(native method) @ java.lang.reflect.method.invoke(method.java:511) @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:1038) @ com.android.internal.os.zygoteinit.main(zygoteinit.java:805) @ dalvik.system.nativestart.main(native method)

and here's question method game class:

private void nextquestiongrad() {           flag.setvisibility(view.gone);          dodatnopitanje.setvisibility(view.visible);           testadapter mdbhelper = new testadapter(this);             databasehelper mydbhelper = new databasehelper(this);              if(!mydbhelper.checkdatabase()){             mdbhelper.createdatabase();             }              try{                    mdbhelper.open();                   cursor c = mdbhelper.gettestdatagradovi(mcurrentid);                 c.movetofirst();                  list<answer> labels = new arraylist<answer>();                  labels.add(new answer(c.getstring(2), true));                 labels.add(new answer(c.getstring(3), false));                 labels.add(new answer(c.getstring(4), false));                 labels.add(new answer(c.getstring(5), false));                  tacanodg = c.getstring(2);                  collections.shuffle(labels);                  dodatnopitanje.settext(c.getstring(1));                  bodgovor1.settext(labels.get(0).option);                 bodgovor1.settag(labels.get(0));                 bodgovor1.setonclicklistener(clicklistenergrad);                  bodgovor2.settext(labels.get(1).option);                 bodgovor2.settag(labels.get(1));                 bodgovor2.setonclicklistener(clicklistenergrad);                  bodgovor3.settext(labels.get(2).option);                 bodgovor3.settag(labels.get(2));                 bodgovor3.setonclicklistener(clicklistenergrad);                  bodgovor4.settext(labels.get(3).option);                 bodgovor4.settag(labels.get(3));                 bodgovor4.setonclicklistener(clicklistenergrad);                  score.settext("score: " + brojactacnihodgovora);              }             finally{                    mdbhelper.close();             }      }

i error on line:

labels.add(new answer(c.getstring(2), true));

here's adapter class:

public class testadapter  {     protected static final string tag = "dataadapter";      private final context mcontext;     private sqlitedatabase mdb;     private databasehelper mdbhelper;      public testadapter(context context)      {         this.mcontext = context;         mdbhelper = new databasehelper(mcontext);     }      public testadapter createdatabase() throws sqlexception      {         try          {             mdbhelper.createdatabase();         }          catch (ioexception mioexception)          {             log.e(tag, mioexception.tostring() + "  unabletocreatedatabase");             throw new error("unabletocreatedatabase");         }         return this;     }      public testadapter open() throws sqlexception      {         try          {             mdbhelper.opendatabase();             mdbhelper.close();             mdb = mdbhelper.getreadabledatabase();         }          catch (sqlexception msqlexception)          {             log.e(tag, "open >>"+ msqlexception.tostring());             throw msqlexception;         }         return this;     }      public void close()      {         mdbhelper.close();     }       public cursor gettestdata(string whereclause){              string sql ="select * tblpitanja 1 = 1 " + whereclause + " order random() limit 1";              return mdb.rawquery(sql, null);          }       public cursor gettestdatagradovi(long id){             string sql ="select * tblgradovi _id = " + id;             return  mdb.rawquery(sql, null);         }       public cursor gettestdatavalute(long id){              string sql ="select * tblvalute _id = " + id;               return mdb.rawquery(sql, null);          }  }

you trying access cursor data seems empty. use c.movetofirst() check if cursor empty - returns boolean indication: boolean isfilledwithdata = c.movetofirst()


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