how to set value in list object from json

how to set value in list object from json - android

I want to set array value in list , i am using volley library for it.Can you please help me how to set value in List dataset = new LinkedList<>(Arrays.asList(name)); like List dataset = new LinkedList<>(Arrays.asList("name1","name2"));.
try {
// Parsing json array response
// loop through each json object
jsonResponse = "";
List<String> dataset=new LinkedList<>();
for (int i = 0; i < response.length(); i++) {
JSONObject person = (JSONObject) response
.get(i);
String name = person.getString("Name");
dataset = (Arrays.asList(name));
}
btnService.attachDataSource(dataset);
}
above code only set last value in dataset.

ArrayList list = new ArrayList();
list.add(name);
and solved my self

Related

Why I am getting null JSON response?

I am fetching data from JSON to android.But, I am getting an empty JSON response. The PHP code which generates JSON data is as follows:
$result = $conn->query("SELECT dbname FROM users ORDER BY dbname ASC");
//defined second array for dbnames' list
$dblist = array();
while($row = $result->fetch_assoc()){
//array_push($response['dblist'],$row['dbname']);
$dblist[] = array('name'=>$row['dbname']);
}
$response['dblist'] = $dblist;
This is the JSON response.
{"dblist":[{"name":"a"},{"name":"arsod"}]}
The Java code to fetch data in android is as follows:
JSONObject obj = new JSONObject(s);
JSONArray names = obj.getJSONArray("dblist");
for(int i=0; i < names.length(); i++) {
JSONObject n = names.getJSONObject(i);
String name = n.getString("name");
Toast.makeText(MainActivity.this, name, Toast.LENGTH_SHORT).show();
institutes.add(name);
}
where institutes is an ArrayList in which I want to add each fetched element. But while fetching the data, I get the error in logcat org.json.JSONException: End of input at character 0 of. What is going wrong?

Considering the following:
s = {"dblist":[{"name":"a"},{"name":"arsod"}]}
Your code should be like,
JSONObject obj = new JSONObject(s);
JSONArray names = obj.getJSONArray("dblist");
for(int i=0; i < names.length(); i++) {
JSONObject n = names.getJSONObject(i);
String name = n.getString("name");
Toast.makeText(MainActivity.this, name, Toast.LENGTH_SHORT).show();
institutes.add(name);
}

remove this line:
JSONObject object = obj.getJSONObject("dblist");
and replace all occurences of object. with obj.
your JSONObject obj doesn't contain "dblist" object, there is only array inside it, so you should look for getJSONArray("dblist") straight inside obj
edit: you are parsing different String s, I've just checked this code:
final String s = "{\"dblist\":[{\"name\":\"a\"},{\"name\":\"arsod\"}]}";
JSONObject obj = new JSONObject(s);
JSONArray names = obj.getJSONArray("dblist");
for (int i = 0; i < names.length(); i++) {
JSONObject n = names.getJSONObject(i);
String name = n.getString("name");
Toast.makeText(this, name, Toast.LENGTH_SHORT).show();
}
which is almost exacly same as your and works pretty fine...

ArrayList of objects are not setting in new ArrayList object

try {
JSONObject jsonObject = new JSONObject(botResponse.getResponseStringUrl());
JSONArray array = jsonObject.getJSONArray("value");
for (int i = 0; i < array.length(); i++) {
JSONObject jo = array.getJSONObject(i);
String seq = jo.getString("sequenceNo");
Log.d("sequenceNo", seq + "iteration" + i);
lo = new ListObject();
lo.setStaffID(jo.getString("staffID"));
lo.setStatus(jo.getString("status"));
lo.setSequenceNo(jo.getString("sequenceNo"));
lo.setReason(jo.getString("reason"));
lo.setFrom(jo.getString("from"));
lo.setDays(jo.getString("days"));
lo.setLeaveType(jo.getString("leaveType"));
lo.setTo(jo.getString("to"));
lo.setName(jo.getString("name"));
developersLists.add(lo);
botresponselist.add(lo);
}
message.setMessageList(botresponselist);
message.setDevelopersList(developersLists);
}
developerlist's all multiple values are not setting in message.setDevelopersList. as setDevelopersList is new arraylist created in message class. only first object is getting set not all the object. but object lo is displaying multiple values. Thank you in Advance

The problem is you are creating new instance of ListObject and saving in the same variable due to this it will store only one value.
You have to create a new ListObject instance within the for loop.
Just add this in the for loop, instead of declaring the ListObject outside the for loop.
ListObject lo = new ListObject();

I am trying to parse through a json could some one help me

I excuted the followinf api request
https://api-v3.mbta.com/predictions?sort=arrival_time&filter%5Bstop%5D=70028%2C70029
and I am having the following parsing problem.
Failed to parse JSON
org.json.JSONException: Value [{"attributes":{"arrival_time":"2018-04-25T13:20:01-04:00","departure_time":"2018-04-25T13:20:01-04:00",
"direction_id":1,"schedule_relationship":null,"status":null,"stop_sequence":140,"track":null}
,"id":"prediction-36315805-70029-140","relationships":{"route":{"data":{"id":"Orange","type":"route"}},"stop":
{"data":{"id":"70029","type":"stop"}},"trip":{"data":{"id":"36315805","type":"trip"}}},"type":"prediction"},{"attributes"
:{"arrival_time":"2018-04-25T13:26:03-04:00","departure_time":"2018-04-25T13:26:03-04:00","direction_id":0,"schedule_relationship":null,
"status":null,"stop_sequence":50,"track":null},"id":"prediction-36315802-70028-50","relationships":{"route":{"data":{"id":"Orange","type":"route"}},"stop":{"data":{"id":"70028","type":"stop"}},"trip":{"data":{"id":"36315802","type":"trip"}}},"type":"prediction"},{"attributes":{"arrival_time":"2018-04-25T13:29:28-04:00","departure_time":"2018-04-25T13:29:28-04:00","direction_id":1,"schedule_relationship":null,"status":null,"stop_sequence":140,"track":null},"id":"prediction-36315806-70029-140","relationships":{"route":{"data":{"id":"Orange","type":"route"}},"stop":{"data":{"id":"70029","type":"stop"}},"trip":{"data":{"id":"36315806","type":"trip"}}},"type":"prediction"},{"attributes":{"arrival_time":"2018-04-25T13:33:00-04:00","departure_time":"2018-04-25T13:33:00-04:00","direction_id":0,"schedule_relationship":null,"status":null,"stop_sequence":50,"track":null},"id":"prediction-36315803-70028-50","relationships":{"route":{"data":{"id":"Orange","type":"route"}},"stop":{"data":{"id":"70028","type":"stop"}},"trip":{"data":{"id":"36315803","type":"trip"}}},"type":"prediction"},{"attributes":{"arrival_time":"2018-04-25T13:36:20-04:00","departure_time":"2018-04-25T13:36:20-04:00","direction_id":1,"schedule_relationship":null,"status":null,"stop_sequence":140,"track":null},"id":"prediction-36315807-70029-140","relationships":{"route":{"data":{"id":"Orange","type":"route"}},"stop":{"data":{"id":"70029","type":"stop"}},"trip":{"data":{"id":"36315807","type":"trip"}}},"type":"prediction"},{"attributes":{"arrival_time":"2018-04-25T13:44:44-04:00","departure_time":"2018-04-25T13:44:44-04:00","direction_id":0,"schedule_relationship":"ADDED","status":null,"stop_sequence":50,"track":null},"id":"prediction-ADDED-1524238424-70028-50","relationships":{"route":{"data":{"id":"Orange","type":"route"}},"stop":{"data":{"id":"70028","type":"stop"}},"trip":{"data":{"id":"ADDED-1524238424","type":"trip"}}},"type":"prediction"},{"attributes":{"arrival_time":"2018-04-25T13:52:00-04:00","departure_time":"2018-04-25T13:52:00-04:00","direction_id":1,"schedule_relationship":null,"status":null,"stop_sequence":140,"track":null},"id":"prediction-36315809-70029-140","relationships":{"route":{"data":{"id":"Orange","type":"route"}},"stop":{"data":{"id":"70029","type":"stop"}},"trip":{"data":{"id":"36315809","type":"trip"}}},"type":"prediction"},{"attributes":{"arrival_time":"2018-04-25T13:52:39-04:00","departure_time":"2018-04-25T13:52:39-04:00","direction_id":0,"schedule_relationship":null,"status":null,"stop_sequence":50,"track":null},"id":"prediction-36315757-70028-50","relationships":{"route":{"data":{"id":"Orange","type":"route"}},"stop":{"data":{"id":"70028","type":"stop"}},"trip":{"data":{"id":"36315757","type":"trip"}}},"type":"prediction"},{"attributes":{"arrival_time":"2018-04-25T14:00:20-04:00","departure_time":"2018-04-25T14:00:20-04:00","direction_id":0,"schedule_relationship":null,"status":null,"stop_sequence":50,"track":null},"id":"prediction-36315758-70028-50","relationships":{"route":{"data":{"id":"Orange","type":"route"}},"stop":{"data":{"id":"70028","type":"stop"}},"trip":{"data":{"id":"36315758","type":"trip"}}},"type":"prediction"},{"attributes":{"arrival_time":"2018-04-25T14:09:34-04:00","departure_time":"2018-04-25T14:09:34-04:00","direction_id":1,"schedule_relationship":null,"status":null,"stop_sequence":140,"track":null},"id":"prediction-36315810-70029-140","relationships":{"route":{"data":{"id":"
I am parsing the code like this
private void parseItems(List<GalleryItem> items, JSONObject jsonBody)
throws IOException, JSONException {
JSONObject photosJsonObject = jsonBody.getJSONObject("data");
JSONArray photoJsonArray = photosJsonObject.getJSONArray("attributes");
for (int i = 0; i < photoJsonArray.length(); i++) {
JSONObject photoJsonObject = photoJsonArray.getJSONObject(i);
GalleryItem item = new GalleryItem();
item.setId(photoJsonObject.getString("arrival_time"));
item.setCaption(photoJsonObject.getString("departure_time"));
item.setUrl(photoJsonObject.getString("departure_time"));
items.add(item);
}
}
could some one tell me where I am making a mistake when parsing the object.
thank you

Well, from your posted json data is an array and attributes is an object, you were trying to parse them the other way around. Try this:
JSONArray data = jsonBody.getJSONArray("data");
for (int i = 0; i < data.length(); i++) {
JSONObject singleData = data.getJSONObject(i);
JSONObject attributes = singleData.getJSONObject("attributes");
GalleryItem item = new GalleryItem();
item.setId(attributes.getString("arrival_time"));
item.setCaption(attributes.getString("departure_time"));
item.setUrl(attributes.getString("departure_time"));
items.add(item);
}

As data is a JSONArray, and your photosJsonObject should be JSONArray not object, which contains the objects. Rest is ok I think.

JSON data list dynamic

I am working in Android just for a heads up. I was able to retrieve JSON data but now I have come to the point where there are multiples. Example:
"workers":[
{
"id":3357,
"username":"Unreliable.worker",
"password":"x",
"monitor":0,
"count_all":41,
"count_all_archive":0,
"hashrate":477,
"difficulty":106.56
},
{
"id":4061,
"username":"Unreliable.worker2",
"password":"x",
"monitor":0,
"count_all":0,
"count_all_archive":null,
"hashrate":0,
"difficulty":0
}
would I have to do a for loop or is there another way to do it?
This is the code that I am using now to get them:
JSONObject workersJSONObject = personalJSONObject.getJSONObject("workers");
but I don't know how I would get for each and separate them. I'll get them by using:
id= workersJSONObject.getDouble("id");

[] in JSON refers to a JSON array. You could use something like:
JSONArray workersJSONArray = personalJSONObject.getJSONArray("workers");
Then loop through each item as (basically get each object inside array):
for (int i = 0; i < workersJSONArray.length(); i++) {
JSONObject workersJSONObject = workersJSONArray.getJSONObject(i);
// parse object just like before
}

On JSON, {} defines an object, [] defines an array instead. if you want details. see this and JSONArray
sample:
JSONArray workersJSOnArray = new JSONArray(stringData);
or
JSONArray workersJSOnArray = personalJSONObject.getJSONArray("workers");
/* THen you can loop from each data you want */
int len = workersJSOnArray.length();
for (int i = 0; i < len; i++)
{
JSONObject item = workersJSOnArray.optJSONObject(i);
int id = item.getInt ("id");
.....
}

Traverse array IN JSONArray

I'm making an app for android which makes a call to a webservice that returns a json with ARRAY as a parameter, I can go through all the settings and save them easily.
The problem is when I get the array that I returned within the JSON object.
Example of JSON:
[{"codigoArticulo":"0001","nombreArticulo":"CHULETAS DE CORDERO","factorVentasDefecto":"KG","precio":21.95,"factoresDeVenta":["KG","UN"]},{"codigoArticulo":"0007","nombreArticulo":"FALDETA DE CORDERO","factorVentasDefecto":"KG","precio":11.95,"factoresDeVenta":["KG","FL"]}]
I can save "codigoArticulo", "nombreArticulo", "factorVentasDefecto" and "precio easily, BUT i don't know how i can save "factoresDeVenta".
i have this code:
JSONArray resparray = new JSONArray(JSONdevuelto);
for (int i = 0; i < resparray.length(); i++) {
JSONObject respJSON = resparray.getJSONObject(i);
int IDArticulo = respJSON.getInt("codigoArticulo");
String NombreArticulo = respJSON.getString("nombreArticulo");
String FactordeVenta = respJSON.getString("factorVentasDefecto");
int PrecioArticulo = respJSON.getInt("precio");
}
How i can save in one array the variables on "factoresDeVenta"?
I try
String[] Factores = respJSON.getJSONArray("factoresDeVenta");
but no works because are incompatible types.
I need the array to make later a Spinner
Thank you.

factoresDeVenta is an JSONArray inside JSONObject so you will need to use getJSONArray or optJSONArray and use loop for getting values from JSONArray:
JSONArray jArray = respJSON.optJSONArray("factoresDeVenta");
for (int i = 0; i < jArray.length(); i++) {
String str_value=jArray.optString(i); //<< jget value from jArray
}

JSONArray jArray = respJSON.getJSONArray("factoresDeVenta");
It would give you the array of data stored in factoresDeVenta, which you can again traverse to get the individual elements from that array.

You can store in ArrayList<String>
ArrayList<String> arrStr = new ArrayList<String>();
JSONArray jArray = respJSON.optJSONArray("factoresDeVenta");
for (int i = 0; i < jArray.length(); i++) {
arrStr.add(jArray.getString(i));
}
And then you can convert arraylist to string array
String[] Factores = arrStr.toArray(new String[arrStr.size()]);

Develop Reference

The Android operating system is a mobile operating system that was developed by Google (GOOGL?) to be primarily used for touchscreen devices, cell phones, and tablets.

how to set value in list object from json - android

ArrayList list = new ArrayList(); list.add(name); and solved my self

Related

Why I am getting null JSON response?

ArrayList of objects are not setting in new ArrayList object

I am trying to parse through a json could some one help me

JSON data list dynamic

Traverse array IN JSONArray

Categories

Resources