Parsing JSON correctly in Android Studio?

Question

Alright, totally new to Android Studio, but I've been trying to parse backpack.tf's json in Android Studio, and I'm a bit stuck.

Here is a little snippet of json I would try to parse:

{
"response": {
    "success": 1,
    "current_time": 1448658000,
    "items": {
        "A Color Similar to Slate": {
            "last_updated": 1448654419,
            "quantity": 48,
            "value": 99
        },

And the code I'm using to parse JSON is here:

   String finalJSON = buffer.toString();
   JSONObject parentObject = new JSONObject(finalJSON);
   JSONArray parentArray = parentObject.getJSONArray("A Color Similar to Slate");

  JSONObject finalObject = parentArray.getJSONObject(3);

  int price = finalObject.getInt("value");

  return "$" + price;

Thanks a bunch!

Answer 1

Try this:

You have JSON:

   {"response":{
        "success": 1,
                "current_time": 1448658000,
                "items": {
            "A Color Similar to Slate": {
                "last_updated": 1448654419,
                        "quantity": 48,
                        "value": 99
            },
        }
    }
    }

Code:

  String finalJSON =buffer.toString();;
    JSONObject parentObject = null;
    try {
        parentObject = new JSONObject(finalJSON);
        JSONObject objectA_Color=parentObject.getJSONObject("response").getJSONObject("items").getJSONObject("A Color Similar to Slate");

       int  value=objectA_Color.getInt("value");
    } catch (JSONException e) {
        e.printStackTrace();
    }

Answer 2

1) Create some (custom, adjusted to your needs) Model class

public class Model {
    private String title;
    private List<String> authors;
//getters fields, magic ...
}

2) Parse your JSON (

public static final String JSON_PATH = "/Users/dawid/Workspace/Test/test.json";

Gson gson = new Gson();
BufferedReader br = new BufferedReader(new FileReader(JSON_PATH));
Model model = gson.fromJson(br, Model.class);

OR

1) Parse it with JSON Parser

BufferedReader br = new BufferedReader(new FileReader(JSON_PATH));
JsonParser parser = new JsonParser();
JsonObject object = parser.parse(br).getAsJsonObject();

Both ways Require GSON library https://github.com/google/gson