CODEWITHSUNDEEP
javaandroidarraylistjson
Alk
Alk

Reputation: 5557

Looping through JSONObject to Create Array Java

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 
                }

Upvotes: 0

Views: 73

Answers (2)

Ragesh Ramesh
Ragesh Ramesh

Reputation: 3520

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.

Upvotes: 2

Sharjeel
Sharjeel

Reputation: 15798

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.

Upvotes: 0

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