Android shuffle Questions and Answers (string arrays) -

i making app in there list of questions , respective answers. questions in 1 string array, while answers in string array.

i have implemented following in wish shuffle questions. (of course answers need linked question, else meaningless)

code:

          selected_q = new string[totalnoofq];           selected_a = new string[totalnoofq];           int[] random_code = new int[totalnoofq];            (int = 0; < totalnoofq; i++)            {                                                              random_code[i] = i;           }            collections.shuffle(arrays.aslist(random_code));           (int j = 0; j < totalnoofq; j++)            {                                                              int k = random_code[j];                                       selected_q [j] = databank_q [k];               selected_a[j] = databank_a [k];           } 

the code reports no fatal error, selected_q still in sequential order. why? please show me how can amend codes? thanks!!!

you shuffle list created using random_code, random_code not modified.

you need create temporary list based on random_code. shuffle list , use fill selected_x arrays.

something should work :

    int[] random_code = new int[totalnoofq];      (int = 0 ; < totalnoofq ; i++) {         random_code[i] = i;     }       list<integer> random_code_list = new arraylist<integer>(); // create arraylist (arraylist used here because has indexes)     (int idx = 0 ; idx <  random_code.length ; idx++) {         random_code_list.add(random_code[idx]); // fill     }     collections.shuffle(random_code_list); // shuffle      (int j = 0 ; j < totalnoofq ; j++) {         int k = random_code_list.get(j); // value         selected_q[j] = databank_q[k];         selected_a[j] = databank_a[k];     }