How to Parse This JSON in Android

Android Studio: How to parse a JSON Object from Inside of a JSON Array?

By getting first node in array you have obtained address node so no need to run loop there, address object is not an array you can get values directly. Try something like this:

        JSONArray array = object.getJSONArray("pollingLocations");
        for (int i = 0; i < array.length(); i++) {
            JSONObject jsonObject = array.getJSONObject(i);
           String locationName = jsonObject.getJSONObject("address")
                   .getString("locationName");
           Log.d("locationName", locationName);
            JSONArray sourcesArray = jsonObject.getJSONArray("sources");

          // run loop to get values from this array
          for (int j = 0; j < sourcesArray.length(); j++){
                JSONObject source = sourcesArray.getJSONObject(j);
                String name = source.getString("name");
            }
        }

How to Parse a JSON Object In Android

In the end I solved it by using JSONObject.get rather than JSONObject.getString and then cast test to a String.

private void saveData(String result) {
    try {
        JSONObject json= (JSONObject) new JSONTokener(result).nextValue();
        JSONObject json2 = json.getJSONObject("results");
        test = (String) json2.get("name");
    } catch (JSONException e) {
        e.printStackTrace();
    }
}

How to parse the Json response in android?

you can parse current json String to get value from it as :

// Convert String to json object
JSONObject json = new JSONObject(responseText);

// get LL json object
JSONObject json_LL = json.getJSONObject("LL");

// get value from LL Json Object
String str_value=json_LL.getString("value"); //<< get value here

How to parse json string in Android?

Use JSON classes for parsing e.g

JSONObject mainObject = new JSONObject(Your_Sring_data);
JSONObject uniObject = mainObject.getJSONObject("university");
String  uniName = uniObject.getString("name");
String uniURL = uniObject.getString("url");

JSONObject oneObject = mainObject.getJSONObject("1");
String id = oneObject.getString("id");
....

How to parse a JSON file with volley

Your data is not a JSONObject instead it is a JSONArray so you would use the JSONArrayRequest from Volley and not JSONObjectRequest like you are using. You are probably getting an exception there which you are catching. After you get the JSONArray this line will give you your station for the first station

JSONObject station = jsonArray.getJSONObject(0).getJSONArray("1").getJSONObject(0);

and

station.getString("motto"); 

will give you the motto for the station.

This is because your data structure is very complicated. I would suggest making it better and easier to navigate

---

This is what your code snippet for request should look like

  JsonArrayRequest jsonArrayRequest = new JsonArrayRequest("https://api.myjson.com/bins/cd6dh",
      new Listener<JSONArray>() {
        @Override
        public void onResponse(JSONArray response) {
          try {
            JSONObject station1 = response.getJSONObject(0).getJSONArray("1").getJSONObject(0);
            String stationName = station1.getString("motto");
          } catch (JSONException e) {
            e.printStackTrace();
          }
        }
      },
      new ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError error) {
          Log.e("volley", "error");
        }
      });
      requestQueue.add(jsonArrayRequest);

Turns out that other than the wrong request, you never assigned a listener either. It was null as the second parameter of your request.

Dynamically Parse JSON | Android

Solution:

Please follow the steps below.

First, create a model class:

public class MyResponse {

    public int page;
    public int pageSize;
    public int totalPageCount;
    public Map<String, String> data;

    (make setter getter for page, pageSize, totalPageCount)

    .......
    .......
}

then, make a custom class as:

class RedirectionInfoDeserializer implements JsonDeserializer<MyResponse> {

    private static final String KEY_PAGE = "page";
    private static final String KEY_PAGESIZE = "pageSize";
    private static final String KEY_TOTALPAGECOUNT = "totalPageCount";
    private static final String KEY_DATA = "data";

    @Override
    public MyResponse deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException {
        final JsonObject jsonObject = json.getAsJsonObject();

        // Read simple String values.
        final String page = jsonObject.get(KEY_PAGE).getAsInt();
        final String pageSize = jsonObject.get(KEY_PAGESIZE).getAsInt();
        final String pageCount = jsonObject.get(KEY_TOTALPAGECOUNT).getAsInt();

        // Read the dynamic parameters object.
        final Map<String, String> data = readParametersMap(jsonObject);

        RedirectionInfo result = new RedirectionInfo();
        result.setUri(uri);
        result.setHttpMethod(httpMethod);
        result.setParameters(parameters);
        return result;
    }

    @Nullable
    private Map<String, String> readParametersMap(@NonNull final JsonObject jsonObject) {
        final JsonElement paramsElement = jsonObject.get(KEY_DATA);
        if (paramsElement == null) {
            // value not present at all, just return null
            return null;
        }

        final JsonObject parametersObject = paramsElement.getAsJsonObject();
        final Map<String, String> parameters = new HashMap<>();
        for (Map.Entry<String, JsonElement> entry : parametersObject.entrySet()) {
            String key = entry.getKey();
            String value = entry.getValue().getAsString();
            data.put(key, value);
        }
        return data;
    }
}

then make a method as:

private Converter.Factory createGsonConverter() {
    GsonBuilder gsonBuilder = new GsonBuilder();
    gsonBuilder.registerTypeAdapter(MyResponse.class, new RedirectionInfoDeserializer());
    Gson gson = gsonBuilder.create();
    return GsonConverterFactory.create(gson);   
}

then, make this change in your Retrofit:

Retrofit retrofit = new Retrofit.Builder()
    .baseUrl("http://myserver.com")
    .addConverterFactory(createGsonConverter())
    .build();

That's it.

Try it, let me know if it works.

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