Convert String into json array object…android

Question

I get from the server array of objects, and by this code I convert it to json:

public static ArrayList<bussListCubic> parseBussinessArray(String result) {
    ArrayList<bussListCubic> arr = new ArrayList<bussListCubic>();
        try {
          JSONArray jArray = new JSONArray(result);
          JSONObject json_data = null;
          for (int i = 0; i < jArray.length(); i++) {
             json_data = jArray.getJSONObject(i);
         bussListCubic userInfo = parseBussListCubic(json_data);
         arr.add(userInfo);
      }
        } catch (JSONException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
}
return arr;

}

Some times the app crashed and this is the error:

Caused by: java.lang.NullPointerException at
org.json.JSONTokener.nextCleanInternal(JSONTokener.java:116) at
org.json.JSONTokener.nextValue(JSONTokener.java:94) at
org.json.JSONArray.<init>(JSONArray.java:87) at
org.json.JSONArray.<init>(JSONArray.java:103)

it is also point that the error with this line : JSONArray jArray = new JSONArray(result) : line #4 in the above code...what does this error mean ?

thank you

Answer 1

The crash is caused by an invalid String result

print the result passed to parseBussinessArray method and see what is its value when crash happens