How to parse json array in android with no name?

Question

How can I parse an json array in android looking like:

["BHUBANESWAR","BANGALORE CANT","BRAHMAPUR","VISAKHAPATNAM",
"VIJAYAWADA ROAD","ASOKHAR","CHAURAKHERI","BANIHAL","SADURA","ANANTNAG",
"PANJGAM","AWANTIPURA","KAKAPORA","PAMPORE"]

What I am trying is:

     try {
            JSONObject json = new JSONObject(s);

            JSONArray jsonArray = json.names();

            for ( int i = 0 ; i < jsonArray.length();i++)
            {
                Toast.makeText(getApplicationContext(),jsonArray.getInt(i),Toast.LENGTH_LONG).show();
            }

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

But I am not getting any output.

Are you sure that you aren't getting an exception for every item because you are trying to coerce a String to an int? — Marcus Hooper
– Marcus Hooper, Commented Oct 3, 2015 at 8:45

uday · Accepted Answer · 2015-10-03 09:46:49Z

4

try this...

try {
        JSONArray jsonArray = new JSONArray(s);

        for ( int i = 0 ; i < jsonArray.length();i++) {

            Toast.makeText(getApplicationContext(),jsonArray.getString(i),Toast.LENGTH_LONG).show();

        }

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

edited Oct 3, 2015 at 9:46

answered Oct 3, 2015 at 8:43

uday

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1 Comment

uday Over a year ago

Please refer this androidhive.info/2012/01/android-json-parsing-tutorial to know about difference between JsonArray and JsonObject

Kelevandos · Accepted Answer · 2015-10-03 10:00:06Z

uday's answer is right, let me offer some more detailed explanation o that.

JSON offers two basic data structures: Object and Array.

Object is formatted like this:

"name":{value(s)}

Value(s) may be another Object, an Array or just some data.

Array, on the other hand, is formatted like this:

[{value}, {value}, {value}...]

Again, value may be an Object, another array or, as in your example, a simple piece of data.

Your error happened because you assumed that the data you receive is an object with an array inside. However, it was actually an anonymous array, which means you can not parse into an JSONObject first, you need to use JSONArray right from the beginning.

So this is an anonymous array:

["BHUBANESWAR","BANGALORE CANT","BRAHMAPUR","VISAKHAPATNAM",
"VIJAYAWADA ROAD","ASOKHAR","CHAURAKHERI","BANIHAL","SADURA","ANANTNAG",
"PANJGAM","AWANTIPURA","KAKAPORA","PAMPORE"]

And if it was an object (called, for example, myArray), it would look like this:

"myArray":["BHUBANESWAR","BANGALORE CANT","BRAHMAPUR","VISAKHAPATNAM",
"VIJAYAWADA ROAD","ASOKHAR","CHAURAKHERI","BANIHAL","SADURA","ANANTNAG",
"PANJGAM","AWANTIPURA","KAKAPORA","PAMPORE"]

The difference is very little (just the "myArray": part) but it must nevertheless be parsed in the right way, or else the parser will fail.

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