java - how to create multiple JSON Object dynamically? -

i trying insert data multiple json objects don't know how create them dynamically in android.

in hard coded way like:-

jsonarray pdoinformation = new jsonarray();  jsonobject pdetail1 = new jsonobject(); jsonobject pdetail2 = new jsonobject(); jsonobject pdetail3 = new jsonobject();  pdetail1.put("productid", 1); pdetail1.put("qty", 3); pdetail1.put("listprice", 9500);  pdetail2.put("productid", 2); pdetail2.put("qty", 4); pdetail2.put("listprice", 8500);  pdetail3.put("productid", 3); pdetail3.put("qty", 2); pdetail3.put("listprice", 1500);  pdoinformation.put(pdetail1); pdoinformation.put(pdetail2); pdoinformation.put(pdetail3); 

but want create these jsonobject dynamically don't know how many of them going needed while coding , in dynamically created jsonobject data filled 3 arraylist of productid, qty , listprice.

so obvious number of dynamically created jsonobject depend on size of 1 arraylist.

arraylist :-

arraylist<string> productid = new arraylist<string>(); arraylist<string> qty = new arraylist<string>(); arraylist<string> listprice= new arraylist<string>(); 

 list<jsonobject> myjsonobjects = new  arraylist<jsonobject> (productid.size());   for(int i=0; i<productid.size(); i++) {     jsonobject obj = new jsonobject();     obj.put("productid", productid.get(i) );     obj.put("qty", qty.get(i));     obj.put("listprice", listprice.get(i));     myjsonobjects.add(obj);  } 

at end jsonobjects in myjsonobjects.