Looping through JSONObject to Create Array Java

Question

I have a JSONObject of the following format:

[{"ascii_name":"Rio de Janeiro"},{"ascii_name":"Riyadh"},{"ascii_name":"Rome"},{"ascii_name":"Rawalpindi"},{"ascii_name":"Rabat"},{"ascii_name":"Recife"},{"ascii_name":"Ra's Bayrut"},{"ascii_name":"Rajkot"}]

which has been created using the following code:

while($row = $all_cities->fetch_array())
{
 $myArray["ascii_name"] = $row["ascii_name"];
 $returnArray[] = $myArray;
}
echo json_encode($returnArray);

Now I am using a Volley task to load this into my Android app. In the onResponsemethod I want to obtain each of the city names and load it into an ArrayList<String> using a for loop. This is my code now, however it won't work since s is a JSONObject not a JSONArray.

@Override
        public void onResponse(String s) {
            try {
                    JSONObject jsonObject = new JSONObject(s);
                for (int i = 0; i < jsonObject.length(); i++) {
                    JSONObject a = jsonObject.getJSONObject(i);
                    ....... more code which isn't relevant 
                }

your server is returning JSONArray and not JSONObject, so no need to convert it. — ELITE
– ELITE, Commented Feb 26, 2016 at 1:42

Ragesh Ramesh · Accepted Answer · 2016-02-26 01:33:27Z

2

Instead of

    JSONObject jsonObject = new JSONObject(s);

use

    JSONArray jsonArray = new JSONArray(s);

Also i think you are using StringRequest in Volley. Switch to JSONObjectRequest in Volley.

answered Feb 26, 2016 at 1:33

Ragesh Ramesh

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Comments

Sharjeel · Accepted Answer · 2016-02-26 01:33:20Z

0

JSONArray jsonArray = new JSONArray(s);
for (int i = 0; i < jsonArray.length(); i++) {
   JSONObject jsonObject = jsonArray.getJSONObject(i);

}

But make sure you do you have correct JSON response. You can do that by printing your json using Log.d before you parse it.

answered Feb 26, 2016 at 1:33

Sharjeel

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