Check if JSONObject key exists

android json jsonexception
Rafa picture Rafa · Sep 9, 2015 · Viewed 7k times · Source

I'm making api calls to a back-end who always has a JSONArray series and sometimes has a JSONArray places. In the code below, I am trying to write an if statement that says, whenever there is no places array, make another http request. However, I am not getting a nullpointer, it just throws a JSON Exception saying there is no value for places. What can I put as the terminating condition, for when places has no value? I have tried places == null and that hasn't worked.

try{
    JSONArray places = passingObject.getJSONArray("places");
    JSONArray series = passingObject.getJSONArray("series");

    if(some condition){
       //do something else
    }
}catch(JSONException e){
    Log.d("JSON EXCEPTION" e.getMessage());
}

Answer

Breavyn picture Breavyn · Sep 9, 2015

Check if the object has a key called places.

if (passingObject.has("places") {
    JSONArray places = passingObject.getJSONArray("places");
} else {
    askServerAgain();
}

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