android - How to pass three string from for loop -

i have made program 'item','qty','rate' have them 3 in string array need them upload in mysql values reapeating several times in database.

here code:

   string items[] = itemsf.split("\n");     string qtys[] = qtyv.split("\n")    string rates[] = ratef.split("\n");     (final string r : rates) {          (final string : items) {             toast.maketext(billgenerating.this, it, toast.length_short).show();              (final string qt : qtys) {                 toast.maketext(billgenerating.this, qt, toast.length_short).show();                  class addbilldetails extends asynctask<void, void, string> {                      progressdialog loading;                      @override                     protected void onpreexecute() {                         super.onpreexecute();                         loading = progressdialog.show(billgenerating.this, "adding...", "wait...", false, false);                     }                      @override                     protected void onpostexecute(string s) {                         super.onpostexecute(s);                         loading.dismiss();                         toast.maketext(billgenerating.this, s, toast.length_long).show();                     }                      @override                     protected string doinbackground(void... v) {                         hashmap<string, string> params = new hashmap<>();                         params.put(key_bill_items, it);                         params.put(key_bill_qty, qt);                         params.put(key_bill_rate, r);                          requesthandler rh = new requesthandler();                         string res = rh.sendpostrequest(config.bill_details_local_job, params);                         return res;                     }                   }                 addbilldetails ae = new addbilldetails();                 ae.execute();             }         }             }            return sum;     } 

i have made mistake in looping process pls me.

assuming items, qtys , rates have same length.

string[] items = itemsf.split("\n"); string[] qtys = qtyv.split("\n"); string[] rates = ratef.split("\n");  for(int = 0; < items.length; i++){     addbilldetails ae = new addbilldetails();     ae.execute(items[i], qtys[i], rates[i]); } 

addbilldetails.class

class addbilldetails extends asynctask<string, string, string> {      progressdialog loading;      @override     protected void onpreexecute() {         super.onpreexecute();         loading = progressdialog.show(billgenerating.this, "adding...", "wait...", false, false);     }      @override     protected void onpostexecute(string s) {         super.onpostexecute(s);         loading.dismiss();         toast.maketext(billgenerating.this, s, toast.length_long).show();     }      @override     protected string doinbackground(string... v) {         hashmap<string, string> params = new hashmap<>();         params.put(key_bill_items, v[0]);         params.put(key_bill_qty, v[1]);         params.put(key_bill_rate, v[2]);          requesthandler rh = new requesthandler();         return rh.sendpostrequest(config.bill_details_local_job, params);     } }