Question

I need to know if an object exists in a JSON string and do different things depending on the existence of that object. If it doesn’t exist, I want omit the object because it throws NullPonterException. I’ve tried using if but no success… Can someone tell me how can I check the existence of an object?

Thank you in advance!

Answer 1

Try something like the following:

String jsonString = yourJsonString;
String nameOfObjectInQuestion = "yourObjectInQuestion";
JSONObject json = null;
JSONObject objectInQuestion = null;
try { 
    json = new JSONObject(jsonString); 
    objectInQuestion = json.getJSONObject(nameOfObjectInQuestion);
} 
catch (JSONException ignored) {}

if (objectInQuestion == null) {
    // Stomp your feet
}
else {
    // Clap your hands
}