Can't get a string from nested downloaded JSON

Question

I'm getting a JSON from the server:

                JSONObject vkjson = response.json;

I have tried to make it a string and check via LogCat to make sure it works - and yeah, it 100% works. But it is nested:

{"response":{"first_name":"...","last_name":"..."} }

I have tried to do this:

       String result = vkjson.getJSONObject("response").getString("first_name");

But IDE doesn't like the getJSONObject part and underlines it. IDE says:

Unhandled exception in org.json.JSONException

What's wrong? Is it because the JSON is loading from the server or the code is incorrect?

Thank you in advance.

score 0 · Answer 1 · answered Jan 09 '18 at 11:51

There's nothing wrong with your code other than not handling the JSONException which is potentially thrown (i.e. what would happen if there isn't an object called "response").

You need to look at exception handling and wrap this code in a try .. catch block or otherwise deal with the exception.

Java exception handling

score 0 · Accepted Answer · answered Jan 09 '18 at 11:52

0

Unhandled exception in org.json.JSONException

Mean that the method can throw a JSONException and you have to handle it.

So you have to:

try {
     String result = vkjson.getJSONObject("response").getString("first_name");
} catch (JSONException exception){
            //Handle exception here
}

answered Jan 09 '18 at 11:52

appersiano

2,670
22
42

Ah, thank you! I thought it means that something is wrong with data being sent to a method – asmodeoux Jan 09 '18 at 11:56

score 0 · Answer 3 · answered Jan 09 '18 at 11:52

0

Do this-:

try
{
 JSONObject vkjson = response.json;

  //More code related to json
}

catch(JsonException e)
{
   e.printStackTrace();
}

answered Jan 09 '18 at 11:52

Shivam Oberoi

1,447
1
9
18

score 0 · Answer 4 · answered Jan 09 '18 at 12:08

            JSONObject jsonObject = null;
            try {
                jsonObject = new JSONObject(responseString);
                if(jsonObject != null)
                {
                    if (jsonObject.has("response")) {
                        JSONObject responseObject = jsonObject.getJSONObject("response");
                        String firstName = responseObject.getString("first_name");
                        Log.d("Tag",firstName);
                    }
                }
            } catch (JSONException e) {
                e.printStackTrace();
            }

Can't get a string from nested downloaded JSON

4 Answers4