sqlite - Android - java.lang.IndexOutOfBoundsException: Invalid Index 1, size is 1 -

i'm creating quiz app , import sqlite database file android project, looks :

it has id, actual question, when right answer, 3 wrong answers , difficulty of question. id has number, question , answers has text type, because want add numbers , text in fields, , difficulty has number type. import file assets folder named dbquestion , tried run app, pressed play button, , opens first question database, when check radio button , press next question these errors:

08-08 06:42:15.266: d/androidruntime(2459): shutting down vm 08-08 06:42:15.266: w/dalvikvm(2459): threadid=1: thread exiting uncaught exception (group=0x414c4700) 08-08 06:42:15.367: e/androidruntime(2459): fatal exception: main 08-08 06:42:15.367: e/androidruntime(2459): java.lang.runtimeexception: unable start activity componentinfo{com.tmm.android.chuck/com.tmm.android.chuck.questionactivity}: java.lang.indexoutofboundsexception: invalid index 1, size 1 08-08 06:42:15.367: e/androidruntime(2459):     @ android.app.activitythread.performlaunchactivity(activitythread.java:2211) 08-08 06:42:15.367: e/androidruntime(2459):     @ android.app.activitythread.handlelaunchactivity(activitythread.java:2261) 08-08 06:42:15.367: e/androidruntime(2459):     @ android.app.activitythread.access$600(activitythread.java:141) 08-08 06:42:15.367: e/androidruntime(2459):     @ android.app.activitythread$h.handlemessage(activitythread.java:1256) 08-08 06:42:15.367: e/androidruntime(2459):     @ android.os.handler.dispatchmessage(handler.java:99) 08-08 06:42:15.367: e/androidruntime(2459):     @ android.os.looper.loop(looper.java:137) 08-08 06:42:15.367: e/androidruntime(2459):     @ android.app.activitythread.main(activitythread.java:5103) 08-08 06:42:15.367: e/androidruntime(2459):     @ java.lang.reflect.method.invokenative(native method) 08-08 06:42:15.367: e/androidruntime(2459):     @ java.lang.reflect.method.invoke(method.java:525) 08-08 06:42:15.367: e/androidruntime(2459):     @ com.android.internal.os.zygoteinit$methodandargscaller.run(zygoteinit.java:737) 08-08 06:42:15.367: e/androidruntime(2459):     @ com.android.internal.os.zygoteinit.main(zygoteinit.java:553) 08-08 06:42:15.367: e/androidruntime(2459):     @ dalvik.system.nativestart.main(native method) 08-08 06:42:15.367: e/androidruntime(2459): caused by: java.lang.indexoutofboundsexception: invalid index 1, size 1 08-08 06:42:15.367: e/androidruntime(2459):     @ java.util.arraylist.throwindexoutofboundsexception(arraylist.java:255) 08-08 06:42:15.367: e/androidruntime(2459):     @ java.util.arraylist.get(arraylist.java:308) 08-08 06:42:15.367: e/androidruntime(2459):     @ com.tmm.android.chuck.quiz.gameplay.getnextquestion(gameplay.java:112) 08-08 06:42:15.367: e/androidruntime(2459):     @ com.tmm.android.chuck.questionactivity.oncreate(questionactivity.java:39) 08-08 06:42:15.367: e/androidruntime(2459):     @ android.app.activity.performcreate(activity.java:5133) 08-08 06:42:15.367: e/androidruntime(2459):     @ android.app.instrumentation.callactivityoncreate(instrumentation.java:1087) 08-08 06:42:15.367: e/androidruntime(2459):     @ android.app.activitythread.performlaunchactivity(activitythread.java:2175) 08-08 06:42:15.367: e/androidruntime(2459):     ... 11 more 08-08 06:42:19.576: d/dalvikvm(2485): gc_for_alloc freed 67k, 6% free 2844k/3016k, paused 187ms, total 197ms 08-08 06:42:20.756: d/gralloc_goldfish(2485): emulator without gpu emulation detected. 

this how dbhelper.class looks like:

package com.tmm.android.chuck.db;  import java.io.file; import java.io.fileoutputstream; import java.io.ioexception; import java.io.inputstream; import java.io.outputstream; import java.util.arraylist; import java.util.list;  import android.content.context; import android.database.cursor; import android.database.sqlexception; import android.database.sqlite.sqlitedatabase; import android.database.sqlite.sqliteopenhelper;  import com.tmm.android.chuck.quiz.question;  /**  * @author robert.hinds  *   */ public class dbhelper extends sqliteopenhelper {      // android's default system path of application database     private static string db_path = "/data/data/com.tmm.android.chuck/databases/";     private static string db_name = "dbquestion";     private sqlitedatabase mydatabase;     private final context mycontext;      /**      * constructor takes , keeps reference of passed context in order      * access application assets , resources.      *       * @param context      */     public dbhelper(context context) {         super(context, db_name, null, 1);         this.mycontext = context;     }      /**      * creates empty database on system , rewrites own      * database.      * */     public void createdatabase() throws ioexception {          boolean dbexist = checkdatabase();         if (!dbexist) {             // calling method , empty database created             // default system path             // of application gonna able overwrite             // database our database.             this.getreadabledatabase();              try {                 copydatabase();             } catch (ioexception e) {                 throw new error("error copying database");             }         }     }      /**      * check if database exist avoid re-copying file each      * time open application.      *       * @return true if exists, false if doesn't      */     private boolean checkdatabase() {         file dbfile = mycontext.getdatabasepath(db_name);         return dbfile.exists();     }      /**      * copies database local assets-folder created      * empty database in system folder, can accessed ,      * handled. done transfering bytestream.      * */     private void copydatabase() throws ioexception {          // open local db input stream         inputstream myinput = mycontext.getassets().open(db_name);          // path created empty db         string outfilename = db_path + db_name;          // open empty db output stream         outputstream myoutput = new fileoutputstream(outfilename);          // transfer bytes inputfile outputfile         byte[] buffer = new byte[1024];         int length;         while ((length = myinput.read(buffer)) > 0) {             myoutput.write(buffer, 0, length);         }          // close streams         myoutput.flush();         myoutput.close();         myinput.close();      }      public void opendatabase() throws sqlexception {         // open database         string mypath = db_path + db_name;         mydatabase = sqlitedatabase.opendatabase(mypath, null,                 sqlitedatabase.open_readonly);     }      @override     public synchronized void close() {         if (mydatabase != null)             mydatabase.close();         super.close();     }      @override     public void oncreate(sqlitedatabase db) {     }      @override     public void onupgrade(sqlitedatabase db, int oldversion, int newversion) {     }      // add public helper methods access , content     // database.     // return cursors doing "return mydatabase.query(....)" it'd     // easy     // create adapters views.      public list<question> getquestionset(int difficulty, int numq) {         list<question> questionset = new arraylist<question>();         cursor c = mydatabase.rawquery(                 "select * questions difficulty=" + difficulty                         + " order random() limit " + numq, null);         while (c.movetonext()) {             // log.d("question", "question found in db: " + c.getstring(1));             question q = new question();             q.setquestion(c.getstring(1));             q.setanswer(c.getstring(2));             q.setoption1(c.getstring(3));             q.setoption2(c.getstring(4));             q.setoption3(c.getstring(5));             q.setrating(difficulty);             questionset.add(q);         }         return questionset;     } } 

gameplay.class :

/**  *   */ package com.tmm.android.chuck.quiz;  import java.util.arraylist; import java.util.list;  /**  * @author robert.hinds  *   * class represents current game being played  * tracks score , player details  *  */ public class gameplay {      private int numrounds;     private int difficulty;     private string playername;     private int right;     private int wrong;     private int round;      private list<question> questions = new arraylist<question>();      /**      * @return playername      */     public string getplayername() {         return playername;     }     /**      * @param playername playername set      */     public void setplayername(string playername) {         this.playername = playername;     }     /**      * @return right      */     public int getright() {         return right;     }     /**      * @param right right set      */     public void setright(int right) {         this.right = right;     }     /**      * @return wrong      */     public int getwrong() {         return wrong;     }     /**      * @param wrong wrong set      */     public void setwrong(int wrong) {         this.wrong = wrong;     }     /**      * @return round      */     public int getround() {         return round;     }     /**      * @param round round set      */     public void setround(int round) {         this.round = round;     }     /**      * @param difficulty difficulty set      */     public void setdifficulty(int difficulty) {         this.difficulty = difficulty;     }     /**      * @return difficulty      */     public int getdifficulty() {         return difficulty;     }     /**      * @param questions questions set      */     public void setquestions(list<question> questions) {         this.questions = questions;     }      /**      * @param q question add      */     public void addquestions(question q) {         this.questions.add(q);     }      /**      * @return questions      */     public list<question> getquestions() {         return questions;     }       public question getnextquestion(){          //get question         question next = questions.get(this.getround());         //update round number next round         this.setround(this.getround()+1);         return next;     }      /**      * method increment number of correct answers game      */     public void incrementrightanswers(){         right ++;     }      /**      * method increment number of incorrect answers game      */     public void incrementwronganswers(){         wrong ++;     }     /**      * @param numrounds numrounds set      */     public void setnumrounds(int numrounds) {         this.numrounds = numrounds;     }     /**      * @return numrounds      */     public int getnumrounds() {         return numrounds;     }      /**      * method checks if game on      * @return boolean      */     public boolean isgameover(){         return (getround() >= getnumrounds());     }   } 

appreciate :)

this whole project ->> https://www.dropbox.com/s/e7jl14b1503aj6v/androidchuckquiz-master.rar

try this.questions =new arraylist<question>(questions);

also try

c.movetonext();  while (!c.isafterlast()) {             // log.d("question", "question found in db: " + c.getstring(1));             question q = new question();             q.setquestion(c.getstring(1));             q.setanswer(c.getstring(2));             q.setoption1(c.getstring(3));             q.setoption2(c.getstring(4));             q.setoption3(c.getstring(5));             q.setrating(difficulty);             questionset.add(q);             c.movetonext();         }