Parse simple JSON Array without key

Question

I need help with parsing simple JSONArray like this:

{
 "text":[
  "Morate popuniti polje tekst."
 ]
}

I have tried with this but I failed:

 if (response_str != null) {
    try {
        JSONObject jsonObj = new JSONObject(response_str);
        JSONArray arrayJson = jsonObj.getJSONArray("text");

        for (int i = 0; i < arrayJson.length(); i++) {
            JSONObject obj = arrayJson.optJSONObject(i);
            error = obj.getString("text");
        }
    }

Dan Harms · Accepted Answer · 2014-04-30 16:27:47Z

9

Your JSONArray is an array of Strings. You can iterate this way

JSONObject jsonObj = new JSONObject(response_str);
JSONArray arrayJson = jsonObj.getJSONArray("text");

for (int i = 0; i < arrayJson.length(); i++) {
    String error = arrayJson.getString(i);
    // Do something with each error here
}

answered Apr 30, 2014 at 16:27

Dan Harms

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3 Comments

Zookey Over a year ago

This works, but Raghunandan answered first, so I will acpet his answer, sorry. Anyway, thank you, this is more complete and clear solution.

Dan Harms Over a year ago

You are free to pick whichever answer you like, but if it is a more complete and clear solution, maybe it should be chosen?

Zookey Over a year ago

He answered faster than you, so I test it and it works, that's fair.

Raghunandan · Accepted Answer · 2014-04-30 17:12:55Z

7

You have a JSONArray text. There is no array of JSONObject.

{  // Json object node 
"text":[ // json array text 
 "Morate popuniti polje tekst." // value
]
}

Just use

for (int i = 0; i < arrayJson.length(); i++) {
  String value =  arrayJson.get(i);
}

In fact there is no need for a loop as you have only 1 element in json array

You can just use

String value = (String) arrayJson.get(0); // index 0 . need to cast it to string

Or

String value = arrayJson.getString(0); // index 0

http://developer.android.com/reference/org/json/JSONArray.html

public Object get (int index)

Added in API level 1
Returns the value at index.

Throws
JSONException   if this array has no value at index, or if that value is the null reference. This method returns normally if the value is JSONObject#NULL.
public boolean getBoolean (int index)

getString

public String getString (int index)

Added in API level 1
Returns the value at index if it exists, coercing it if necessary.

Throws
JSONException   if no such value exists.

edited Apr 30, 2014 at 17:12

answered Apr 30, 2014 at 16:26

Raghunandan

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1 Comment

Zookey Over a year ago

Anyway, dcharms answer is more clear, so you should edit your, because somebody else could have same problem.

matiash · Accepted Answer · 2014-04-30 16:27:38Z

3

Try this:

JSONObject jsonObject = new JSONObject(response_str);
JSONArray arrayJson = jsonObject.getJSONArray("text");
String theString = arrayJson.getString(0);

answered Apr 30, 2014 at 16:27

matiash

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