Android JSON parsing of multiple JSONObjects inside JSONObject

Question

I have a JSON string coming from the server and it looks like this:

{
    \"categories\": {
        \"0\": {
            \"term_id\": \"247\",
            \"         


        

Answer 1

Big thanks to Ahmad Dwaik and Tom Hart fot the answers. This is the code for solution.

try
        {   

            JSONObject jObject= new JSONObject(responseData).getJSONObject("categories");
            Iterator<String> keys = jObject.keys();
            while( keys.hasNext() )
            {
                String key = keys.next();
                Log.v("**********", "**********");
                Log.v("category key", key);
                JSONObject innerJObject = jObject.getJSONObject(key);

                String name = innerJObject.getString("name");
                String term_id = innerJObject.getString("term_id");

                Log.v("name = "+name, "term_id = "+term_id);

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

Answer 2

Use the keys() iterator to iterate over all the properties, and call get() for each.

Iterator<String> iter = json.keys();
while (iter.hasNext()) {
    String key = iter.next();
    try {
        Object value = json.get(key);
    } catch (JSONException e) {
        // Something went wrong!
    }
}

See this : https://stackoverflow.com/a/13573965/2480911

Answer 3

Check this answer , that way you don't need to know the keys, and can just loop through and access the inner object, but categories would be better as a JSONArray rather than an Object, that way you could just normally loop through

for(int i = 0; i < array.length(); i++) {
    JSONObject obj = myArray.get(i);
    ....
}

Answer 4

try this

JSONObject jObject = new JSONObject(responceData);
JSONObject categoryObject = jObject.getJSONObject("categories");
JSONObject obj0 = categoryObject.getJSONObject("0");
String termId0 obj0.getString("term_id");
String name0 obj0.getString("name");
JSONObject obj1 = categoryObject.getJSONObject("1");
String termId1 obj1.getString("term_id");
String name1 obj1.getString("name");

but i agree with wqrahd, categories should be an array

Answer 5

While Ahmad Dwaik 'Warlock' has provided a very good answer but there is a mistake in his code current code is --

try
{   
    String jsonString="";//your json string here
    JSONObject jObject= new JSONObject(jsonString).getJSONObject("categories");
    Iterator<String> keys = jObject.keys();
    while( keys.hasNext() )
    {
        String key = keys.next();
        Log.v("**********", "**********");
        Log.v("category key", key);
        JSONObject innerJObject = jObject.getJSONObject(key);
        Iterator<String> innerKeys = innerJObject.keys();
        while( innerKeys.hasNext() )
        {
            String innerKkey = innerKeys.next();  //Here was the error
            String value = innerJObject.getString(innerKkey);
            Log.v("key = "+key, "value = "+value);
        }
    }
}
catch (JSONException e)
{   e.printStackTrace();    }

Answer 6

here you can retrieve all your json data, ask for a specific key and innerKey to get what you want, cheers

    try
    {   
        String jsonString="";//your json string here
        JSONObject jObject= new JSONObject(jsonString).getJSONObject("categories");
        Iterator<String> keys = jObject.keys();
        while( keys.hasNext() )
        {
            String key = keys.next();
            Log.v("**********", "**********");
            Log.v("category key", key);
            JSONObject innerJObject = jObject.getJSONObject(key);
            Iterator<String> innerKeys = innerJObject.keys();
            while( innerKeys.hasNext() )
            {
                String innerKkey = keys.next();
                String value = innerJObject.getString(innerKkey);
                Log.v("key = "+key, "value = "+value);
            }
        }
    }
    catch (JSONException e)
    {   e.printStackTrace();    }