My String contains json
result=[{"USER_ID":83,"PROJECT_BY_DETAILS":"An adaptation of a nursery rhyme into a dramatic film"},{"USER_ID":88,"PROJECT_BY_DETAILS":"Test - over ye mountain blue "}]
How to create JSONOBject and JSONarray from this string
I used this code
JSONObject json =new JSONObject(result);
//Get the element that holds the earthquakes ( JSONArray )
JSONArray earthquakes = json.getJSONArray("");
i got error
Error parsing data org.json.JSONException: Value [{"USER_ID":83,"PRO
If it starts with [ its an array, try with:
JSONArray json =new JSONArray(result);
Difference between JSONObject and JSONArray
use this code for your JsonArray:
try {
JSONArray json = new JSONArray(YOUR_JSON_STRING);
for (int i = 0; i < json.length(); i++) {
JSONObject jsonDATA = json.getJSONObject(i);
String jsonid = jsonDATA.getInt("USER_ID");
String jsondetails = jsonDATA.getString("PROJECT_BY_DETAILS");
}
} catch (JSONException e) {
return null;
}
use Gson for you to do that.
That Json response is an array you know it because of the square brackets [].
Create a mapping object (a java class) with field USER_ID and PROJECT_BY_DETAILS.
public class yourClass(){
public String USER_ID;
public String PROJECT_BY_DETAILS;
}
Create a Type array like so.
final Type typeYourObject = new TypeToken>(){}.getType();
define your list private
List yourList;
Using Gson you will convert that array to a List like so
yourList = gson.fromJson(yourJson, typeYourObject);
with that list later you can do whatever you want. Also with Gson convert it back to JsonArray or create a customs JsonObject.
According to my understanding the JSON object looks like this,
{
"RESULT":[
{
"USER_ID":83,
"PROJECT_BY_DETAILS":"An adaptation of a nursery rhyme into a dramatic film"
},
{
"USER_ID":88,
"PROJECT_BY_DETAILS":"Test - over ye mountain blue "
}
]
}
You are converting this to a String and you wish to re-construct the JSON object. The decode function in the android-side would be this,
void jsonDecode(String jsonResponse)
{
try
{
JSONObject jsonRootObject = new JSONObject(jsonResponse);
JSONArray jData = jsonRootObject.getJSONArray("RESULT");
for(int i = 0; i < jData.length(); ++i)
{
JSONObject jObj = jData.getJSONObject(i);
String userID = jObj.optString("USER_ID");
String projectDetails = jObj.optString("PROJECT_BY_DETAILS");
Toast.makeText(context, userID + " -- " + projectDetails,0).show();
}
}
catch(JSONException e)
{
e.printStackTrace();
}
}
Related
I have this code to get all information from website, I did it very well and it works, but I got stuck when trying to get "fields" from the site
This is the site url:
http://content.guardianapis.com/search?order-by=newest&show-references=author&show-tags=contributor&q=technology&show-fields=thumbnail&api-key=test
Here is the code and how can I fix it
try {
JSONObject jsonRes = new JSONObject(response);
JSONObject jsonResults = jsonRes.getJSONObject("response");
JSONArray resultsArray = jsonResults.getJSONArray("results");
for (int i = 0; i < resultsArray.length(); i++) {
JSONObject oneResult = resultsArray.getJSONObject(i);
String url = oneResult.getString("webUrl");
String webTitle = oneResult.getString("webTitle");
String section = oneResult.getString("sectionName");
String date = oneResult.getString("webPublicationDate");
date = formatDate(date);
JSONArray fields = oneResult.getJSONArray("fields");
JSONArray fieldsArray=oneResult.getJSONArray("fields");
String imageThumbnail= null;
if(fields.length()>0){
imageThumbnail=fields.getJSONObject(0).getString("thumbnail");
}
resultOfNewsData.add(new News(webTitle url, date, section, imageThumbnail));
}
} catch (JSONException e) {
Log.e("FromLoader", "Err parsing response", e);
}
Because the fields object isn't an Array is a JSON object
"fields":{"thumbnail":"https://media.guim.co.uk/fa5ae6ca7c78fdfc4ac0fe4212562e6daf4dfb3d/0_265_4032_2419/500.jpg"}
An array object should contain [ JSON1, JSON2, JSON3 ]
In your case this
JSONArray fields = oneResult.getJSONArray("fields");
becomes this
JSONObject fields = oneResult.getJSONObject("fields");
And I don't understand why are you getting the same data twice - fields and fieldsArray
I have this json response:
[{"id":"1","cat":"A","pic":"false","sector":"1"},{"id":"2","cat":"B","pic":"true","sector":"2"}]
I need to parse it on android.
I have trying follow code:
JSONObject obj = new JSONObject(response);
JSONArray jsonArray = obj.getJSONArray("");
JSONObject jsonObject = jsonArray.getJSONObject(0);
Log.d("ID -> ", jsonObject.getString("id"));
Log.d("CAT -> ", jsonObject.getString("cat"));
But it doesnt work.
If my result will be:
{ "data":[{"id":"1","cat":"A","pic":"false","sector":"1"},{"id":"2","cat":"B","pic":"true","sector":"2"}]}
And I modify the code in:
JSONArray jsonArray = obj.getJSONArray("data");
It works.
How Can I parse It considered my first json response (without "data")
Thank you.
You should use next code:
JSONArray jsonArray = new JSONArray(response);
JSONObject jsonObject = jsonArray.getJSONObject(0);
Log.d("ID -> ", jsonObject.getString("id"));
Log.d("CAT -> ", jsonObject.getString("cat"));
Because you have not an object in json, but an array, so you should create array instead of object. And thats why your modification works. Because in modified code "data" is an object (JSONObject)
JSONArray array = new JSONArray(string_of_json_array);
for (int i = 0; i < array.length(); i++) {
JSONObject row = array.getJSONObject(i);
id = row.getInt("id");
pic = row.getString("pic");
}
Or you can just use Gson Library. Just create your pojo classes
public class Data{
int id;
String cat;
String pic;
String sector;
//setter and getter
}
then,
List<Data> datas = gson.fromJson(string_of_json_array, new TypeToken<List<Data>>(){}.getType());
for(Data item: datas){
String pic = item.getPic();
}
I have a json with colon between the strings, and I'm not sure how can I parse it. I know that I don't have an array in the json, but I'm not sure how can I get the values...
{
"config": {
"network": {
"hni:21407" : "num:[INTNUM]",
"hni:311490" : "num:044[INTNUM]"
}
}
}
This is what I'm trying, but I never go through the loop for, and not really sure if I need it.
JSONObject obj = new JSONObject(netWorkJson);
String arr = obj.optString("network");
for(int i = 0; i < arr.length(); i++) {
String hni = obj.getString("hni");
String num = obj.getString("num");
}
Thanks in advance
You first need to parse the inner json object "network", after that you can loop over it's keys and get the values for them one by one:
private void parseJSON(String netWorkJson) throws JSONException {
JSONObject obj = new JSONObject(netWorkJson);
JSONObject config = obj.getJSONObject("config");
JSONObject network = config.getJSONObject("network");
Iterator<?> keys = network.keys();
while(keys.hasNext()) {
String key = (String) keys.next();
String value = network.getString(key);
}
}
Beauty of this is that it will also work if you had 100 hni values for example, and that you don't have to get them one by one.
network is JSONObject instead of JSONArray, so no need to use for-loop for getting value from it.just use do it as:
JSONObject obj = new JSONObject(netWorkJson);
// get network JSONObject from obj
JSONObject network=obj.getJSONObject("network");
// get both values from network object
String strHni=network.optString("hni:21407");
String strNum =network.optString("hni:311490");
JSONObject message = new JSONObject(config);
String value=message.getJSONObject("network").getString("hni:21407")
Try This
try {
JSONObject jsonObject = new JSONObject("config");
JSONArray jsonArray = jsonObject.getJSONArray("network");
for(int i =0;i<jsonArray.length();i++){
JSONObject jsonObject1 = jsonArray.getJSONObject(i);
String hni21407 = jsonObject1.getString("hni:21407");
String hni311490 = jsonObject1.getString("hni:311490");
}
} catch (JSONException e) {
e.printStackTrace();
}
My application connects to the web and retrieves a JSON file. I am having some issues retrieving the data that I need from this file. Here is the link to the JSON file: http://api.wunderground.com/api/f9d9bc3cc3834375/forecast/q/CA/San_Francisco.json
Here is a snippet of what it looks like:
I would like to get the value of the "period" variable in the first JSon object within the "forecastday" array, which should be 0. Here is how i'm looking at this. "forecastday" is the array, within that there are a number of JSon objects, each containing variables like "period","icon"....."pop".
In my code, I attempt to get the JSON array "forecastday" and then get the first Json object of the array, I then retrieve the value of "period" in that object and set it in a TextView:
protected void onPostExecute(String response) {
if(response == null) {
response = "THERE WAS AN ERROR";
}
progressBar.setVisibility(View.GONE);
try {
JSONObject jsonObj = new JSONObject(response);
JSONArray contacts = jsonObj.getJSONArray("forecastday");
JSONObject c = contacts.getJSONObject(0);
String period = c.getString("period");
responseView.setText(period);
} catch (JSONException e) {
e.printStackTrace();
}
}
When I run the code, nothing is being retrieved. I'm new to working with JSon and am wondering if I'm looking at this wrong. Please help.
Your "forecastday" JSONArray is inside the "txt_forecast" JSONObject that is inside the "forecast" JSONObject of your response, so you have to extract your JSONArray from this JSONObject and not from the root JSON response :
try {
JSONObject jsonObj = new JSONObject(response);
--> JSONObject forecatsObj = jsonObj.getJSONObject("forecast");
--> JSONObject txtForecatsObj = forecatsObj.getJSONObject("txt_forecast");
JSONArray contacts = txtForecatsObj.getJSONArray("forecastday");
...
You were close but it is incorrect, try like this:
JSONObject jsonObj = new JSONObject(response);
JSONObject forecast = jsonObj.getJSONObject("forecast");
JSONObject txtForecast = forecast.getJSONObject("txt_forecast");
JSONArray forecastDay = txtForecast.getJSONArray("forecastday");
//parse the first period value
String period = forecastDay.getJSONObject(0).getString("period");
responseView.setText(period);
Try this code :
try {
JSONObject jsonObj = new JSONObject(response);
JSONObject forecastObj = jsonObj.getJSONObject("forecast");
JSONObject txt_forecastObj = forecastObj.getJSONObject("txt_forecast");
JSONArray foracastdayArray = txt_forecastObj.getJSONArray("foracastday");
JSONObject oOjb0 = foracastdayArray.getJSONObject(0);
String period = oOjb0.getString("perioed");
}catch (Exception e){
}
This code works for me fine:
JSONObject jsonResponse = new JSONObject(responce);
JSONArray jsonMainNode = jsonResponse.optJSONArray("forecastday");
for (int i = 0; i < jsonMainNode.length(); i++) {
JSONObject jsonChildNode = jsonMainNode.getJSONObject(i);
String period = jsonChildNode.optString("period");
responceView.setText(period);
}
I am receiving a String response from the following #Override method
#Override
publc void onSuccess(String response) {
....
}
The conflict I am facing is that I do not know how to break up this response into key value pairings. This is an example of the response.
{"action":{"generic_message":"test generic message"},"domains":{"key_example_one":"https:/google.com","api_root_url":"https://test.com/new/0.2/json"},"page":null}}
I have attempted to convert the string to a JSONObject, and then adding the JSONObjects to a JSONArray.
JSONObject mJObj;
try {
mJObj = new JSONObject(response);
JSONArray mJArry = mJObj.getJSONArray("action");
for (int i = 0; i < mJArry.length(); i++) {
JSONObject newObj = mJArry.getJSONObject(i);
String test2 = newObj.getString("generic_example_for_all_platforms");
}
} catch (JSONException e) {
e.printStackTrace();
}
EDIT: I am getting JSON exception that JSONArray cannot be converted to JSONObject, for the following line.
JSONArray mJArry = mJObj.getJSONArray("action");
Thanks in advante
You do want to read more about JSON here.
The first thing to know is that {} is equal to a Json Object and [] is equal to a Json Array.
try {
JSONObject mJObj = new JSONObject(response);
JSONObject actionJsonObject = mJObj.getJSONObject("action");
String generic_message = actionJsonObject.getString("generic_message");
JSONObject domainsJsonObject = mJObj.getJSONObject("domains");
String key_example_one = domainsJsonObject.getString("key_example_one");
String api_root_url = domainsJsonObject.getString("api_root_url");
String page = mJObj.getString("page");
} catch (JSONException e) {
e.printStackTrace();
}
Check out Gson.
JsonObject jsonObject = new JsonParser().parse(jsonString).getAsJsonObject();
EDIT:
Just saw that you can't move to other Json processors. The property 'action' holds a JSONObject not a JSONArray. What about JSONObject jsonObject = mJObj.getJSONObject("action").