Develop Reference

Remove The Json Value From Json

I want to remove json value from below json file .
This is my json object :
{
"Approximation": {
"name": "Approximation",
"description": [
"Approximation",
"Approximation",
"Approximation"
],
"video": [
"evideo/package1/maths/Approximation/349188_f2ba28819a74355a456ef91d95451b71/349188_f2ba28819a74355a456ef91d95451b71/349188.mpd",
"evideo/package3/maths/approxomation/396183_Approximation/396183_fcedf516e0f5c935d561d486058fa6e0/396183.mpd",
"evideo/package2/maths/approxomation/387010_01approximation/387010_949440b1082fea19faa7dcb4aebf0b43/387010.mpd"
]
}
}
and this is what I'm trying
Code :
for (int i = 0; i < jsonArr.length(); i++) {
JSONObject jsonObj = jsonArr.getJSONObject(i);
jsonArr.remove(i);
children = new ArrayList<ChildrenEvent>();
et = new Events(jsonObj.optString("name"));
ct = new ChildrenEvent(jsonObj.optString("description"));
langs.add(et);
children.add(ct);
}

I am not sure what you are trying to achieve here. You don't need to remove the key "Approximation" to get the data.
This is how you parse this JSON.
{
"Approximation": {
"name": "Approximation",
"description": ["Approximation", "Approximation", "Approximation"],
"video": ["evideo/package1/maths/Approximation/349188_f2ba28819a74355a456ef91d95451b71/349188_f2ba28819a74355a456ef91d95451b71/349188.mpd", "evideo/package3/maths/approxomation/396183_Approximation/396183_fcedf516e0f5c935d561d486058fa6e0/396183.mpd", "evideo/package2/maths/approxomation/387010_01approximation/387010_949440b1082fea19faa7dcb4aebf0b43/387010.mpd"]
}
}
Code,
JSONObject mainObj = new JSONObject(json_string);
JSONObject appproxObj = mainObj.getJSONObject("Approximation");
// Parse name
String name = appproxObj.getString("name");
et = new Events(name);
langs.add(et);
// Parse descriptions
JSONArray descriptions = appproxObj.getJSONArray("description");
children = new ArrayList<ChildrenEvent>();
for (int i = 0; i < descriptions.length(); i++ ) {
String description = descriptions.getString(i);
ct = new ChildrenEvent(description);
children.add(ct);
}
Still if you need the JSON without key "Approximation", the variable appproxObj has the JSON without the key.

There is a method in JsonObject, that is remove(). It will help you to remove any key from jsonObject;
Use this:-
jsonObject.remove("key");

How to extract values from JSONObject in android

1.I am having json object like this how can i get the access to all values in android
2.before anyone down voting that i want to say i have searched stackoverflow for similar examples but those examples contains JSONObject and then JSONArray
3.Here in my case everything is JSONObject so i'm little bit confused
{
"1":
{"sno":"10","latitude":"31.249441437085455","longitude":"75.70003598928452"},
"2":
{"sno":"11","latitude":"31.249398442090207","longitude":"75.70003397762775"}
}
This is how i made it to JSONObject
1.Below code returned me output like that which is all JSONObject
2.Is there any way to make "1" and "2" as JSONArray ?
$select_rows = "select sno,latitude,longitude from activities where username='$username'";
if ($result = mysql_query($select_rows)) {
$num_of_fields = mysql_num_fields($result);
$num_of_rows = mysql_num_rows($result);
$i = 0;
$j = 1;
while ($retrieved = mysql_fetch_array($result)) {
for ($i = 0; $i < $num_of_fields; $i++) {
$field_name = mysql_field_name($result, $i);
$object[$j][$field_name] = $retrieved[$field_name];
}
$j++;
}
echo json_encode($object);
}

Hope this may help you
JSONObject jsonObject=new JSONObject(result);
jsonObject=jsonObject.getJSONObject("1");
Double lat=jsonObject.getDouble("latitude");
Toast.makeText(getBaseContext(),""+ lat, Toast.LENGTH_LONG).show();

Better create a valid JSONArray to make things easier. When you create the JSON string , don't append the index. I believe your are reading the data from sqlite and generating the JSON string.
Also change the outer { (curly brace) to [ (square bracket) to represent as Array element. So your json string will be like this
[
{
"sno": "10",
"latitude": "31.249441437085455",
"longitude": "75.70003598928452"
},
{
"sno": "11",
"latitude": "31.249398442090207",
"longitude": "75.70003397762775"
}
]
Then , you can simply get its as JSONArray
JSONArray jsonArray = new JSONArray(jsonString);
And then read each element in array item
for(int index = 0;index < jsonArray.length(); index++) {
JSONObject jsonObject = jsonArray.getJSONObject(index);
}

To get one of your inner JSONObject elements, you'll need to get it from the outer one using getJSONObject(String key).
Sample code:
JSONObject item1 = myJson.getJSONObject("1");
//item1 now contains {sno:10,latitude:31.2...etc}
//now you can get the individual values out of the resulting JSON Object
//for example, getting the latitude
double lat = item1.getDouble("latitude");

is my JSON response correct? and why i see this exception when i try to retrieve it?

my problem is that i have an asp. web service .. and it gives me the following result when i invoke it :
[
{
"_OrderDetails": [
{
"ProductName": "FUCHS SUPER GT SAE 10W30 6X5 / FP10100010102",
"TotalAfterDiscount_Lc": "7500",
"MeasureUnitName": "كرتونة",
"TotalPrice_Lc": "7500",
"PricePerUnit_Lc": "75",
"Quantity": "100"
}
],
"Id": "274",
"OrderDate": "4/10/2014 12:00:00 AM",
"Number": "16",
"CustomerName": "الأسد",
"Note": ""
}
]
and in the main activity i do the following :
Gson gson = new Gson();
Log.e("Response", responseJSON);
if (responseJSON != null) {
try {
JSONObject jsonObj = new JSONObject(responseJSON);
//JSONArray jsonarr =new JSONArray();
// details=jsonObj.getJSONObject(0);
// Getting JSON Array node
details = jsonObj.getJSONArray(TAG_CONTACTS);
// looping through All Contacts
for (int i = 0; i < details.length(); i++) {
JSONObject c = details.getJSONObject(i);
String product = c.getString(TAG_PRODUCT);
Log.e("prodeuct",product+"");
}
i see the response in the logcat correctly but when i try to get any object from the array i see a JSON exception it says :
JSON array can't be converted to JSON object !!!
please can anyone help me??

Because your json return jsonarray and you are try to access jsonobject.
Change your code:
if (responseJSON != null) {
try {
JSONArray jsonObj = new JSONArray(responseJSON);
// looping through All Contacts
for (int i = 0; i < jsonObj.length(); i++) {
// your code
}

Chang to JSONArray
if (responseJSON != null) {
try {
JSONArray array = new JSONArray(responseJSON)
}

http://jsonviewer.stack.hu/ use it to view your json and resolve it accordingly. you are using json array as json object.
use these:
JSONObject jsonObj = new JSONObject(responseJSON);
to
JSONArray jr = new JSONArray(responseJSON);

JSON Handling Quick

Hey guys this is the first time I am doing JSON and I have gotten the json from the server. Now my only question is how do I take the data.
The JSON includes
[
{
"name": "Joe Smith",
"employeeId":1,
"company": "ABC",
"phone": {
"work": "555-555-5555",
"home": "666-666-6666",
"mobile": "777-777-7777"
}
},
{
"name": "Does Smith",
"employeeId":2,
"company": "XYZ",
"phone": {
"work": "111-111-1111",
"home": "222-222-2222",
"mobile": "333-333-3333"
}
}
]
jsonData is my string of the JSON
Currently I have:
JSONObject json = new JSONOBject(jsonData);
JSONObject data = json.getJSONObject(*******)
JSONArray phones = data.getJSONArray("phone");
not sure what to put on the second line. Also, what is the best way to group the information.
Please make it easy to understand, not exactly a professional yet haha
Thanks!

Your first line is wrong because current string is JSONArray of JSONObject's so get data from current string as:
JSONArray json = new JSONArray(jsonData);
for(int i=0;i<json.length();i++){
JSONObject data = json.getJSONObject(i);
// get name,employeeId,... from data
String str_name=data.optString("work");
//...
JSONObject jsonobjphones = data.getJSONObject("phone");
// get work from phone JSONObject
String str_work=jsonobjphones.optString("work");
//....
}

Try this
List list=new ArrayList();
JSONObject jObject = new JSONObject(str_response_starter);
JSONArray json_array_item_id = jObject.getJSONArray("itemid");
System.out.println("json array item id"+json_array_item_id);
JSONArray json_array_item_name = jObject.getJSONArray("itemname");
System.out.println("json array item name"+json_array_item_name);
JSONArray json_array_item_type = jObject.getJSONArray("type");
System.out.println("json array item type"+json_array_item_type);
JSONArray json_array_item_cost = jObject.getJSONArray("cost");
System.out.println("json array item cost"+json_array_item_cost);
Now
List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(kvPairs.size());
String k, v;
Iterator<String> itKeys = kvPairs.keySet().iterator();
while (itKeys.hasNext()) {
k = itKeys.next();
System.out.println(" value of k"+k);
v = kvPairs.get(k);
System.out.println(" value of v"+v);

In JSON, [] represents JSONArray, {} represents JSONObject. In your JSON string, it starts with [, so you need to start with JSONArray:
JSONArray people = new JSONArray(jsonData);
And then you'll notice that each person is a JSONObject, so now you need to loop them in order to get their information:
for(int i=0;i<people.length();i++){
JSONObject person = people.getJSONObject(i);
JSONObject phones = person.getJSONObject("phone"); //phone is also a JSONObject, because it starts with '{'
String workPhone = phones.get("work");
}

How to call the JSON object in Android

I am new to the android development. i am having the following android code to call the json
try {
JSONObject jsonObject = new JSONObject(result);
//JSONObject object = jsonObject.getJSONObject("CUSTOMER_ID");
JSONArray jArray = new JSONArray(CUSTOMER_ID);
returnUsername1 = jArray.getInt("CUSTOMER_ID");
Toast.makeText(getApplicationContext(), ""+returnUsername1,Toast.LENGTH_LONG).show();
for (int i = 0; i < jArray.length(); i++) {
}
My JSON format is like [[{"0":"1","CUSTOMER_ID":"1"}]].
i refer some json format it should like [{"0":"1","sno":"1"}] i can understand this.But mine is different from this.
how can i call the customer_id using the above code.anyone can suggest a solution.

What you have is a Json Array
JSONArray jsonarray = new JSONArray(result); // result is a Array
[ represents json array node
{ represents json object node
Your Json. Do you need a Json array twice?
[ // array
[ //array
{ // object
"0": "1",
"CUSTOMER_ID": "1"
}
]
]
Parsing
JSONArray jsonArray = new JSONArray(result);
JSONArray ja= (JSONArray) jsonArray.get(0);
JSONObject jb = (JSONObject) ja.get(0);
String firstvalue = jb.getString("0");
String secondvalue = jb.getString("CUSTOMER_ID");
Log.i("first value is",firstvalue);
Log.i("second value is",secondvalue);
LogCat
07-22 14:37:02.990: I/first value is(6041): 1
07-22 14:37:03.048: I/second value is(6041): 1

Generally, to get a JSONObject from a JSONArray:
JSONObject jsonObject = jsonArray.getJSONObject(0); //0 -> first object
And then
int userID = jsonObject.getInt("CUSTOMER_ID");

CUSTOMER_ID is not considered a JSONObject in this case. If jsonObject is what you think it is, then you should be able to access it with jsonObject.getString("CUSTOMER_ID")

if you have any problems regarding to your JSON format first validate it through this site
http://jsonlint.com/
then for parsing
JSONObject jsonObject = new JSONObject(result);
// since your value for CUSTOMER_ID in your json text is string then you should get it as
// string and then convert to an int
returnUsername1 = Integer.parseInt(jsonObject.getString("CUSTOMER_ID"));

Try this
JSONObject jsonObject = new JSONObject(result);
JSONArray jArray =json.getJSONArray("enterjsonarraynamehere");
for (int i=0; i < jArray.length(); i++)
{
try {
JSONObject oneObject = jArray.getJSONObject(i);
// Pulling items from the array
String cust= oneObject.getString("CUSTOMER_ID");
} catch (JSONException e) {
// Oops something went wrong
}
}
Im assuming your json is something like this
<somecode>
{
"enterjsonarraynamehere": [
{ "0":"1",
"CUSTOMER_ID":"1"
},
{ "0":"2",
"CUSTOMER_ID":"2"
}
],
"count": 2
}
<somecode>