Question

My code extract results of JSONObject, but, sometimes, the i value don’t begin to 1, and i have an error like that :

org.json.JSONException: No value for 1

My code :

JSONObject obj = new JSONObject(result);
       for(int i=1;i<=14;i++) {

            JSONArray arr = obj.getJSONArray(""+i);
        extraction(arr, i);
       }

I want to test before the extraction if the object code (i) exists or not. How i can do this ?

Answer 1

use obj.optJSONArray(name) the response will be null if the name does not exists.

JSONObject obj = new JSONObject(result);
   for(int i=1;i<=14;i++) {

        JSONArray arr = obj.optJSONArray(""+i);
        if(arr != null) {
              extraction(arr, i);
        }
   }