How can parse my json result - java

I am working in android. I want to parse my json data.
This is my json data:-
{
"response":{
"groups":[
{
"type":"nearby",
"name":"Nearby",
"items":[
{
"id":"4ed0c8f48231b9ef88fe5f09",
"name":"Banayan Tree School",
"contact":{
},
"location":{
"lat":26.857954980225713,
"lng":75.76602927296061,
"distance":510
},
"categories":[
{
"id":"4bf58dd8d48988d1a8941735",
"name":"General College & University",
"pluralName":"General Colleges & Universities",
"shortName":"Other - Education",
"icon":"https:\/\/foursquare.com\/img\/categories\/education\/default.png",
"parents":[
"Colleges & Universities"
],
"primary":true
}
],
"verified":false,
"stats":{
"checkinsCount":5,
"usersCount":4,
"tipCount":0
},
"hereNow":{
"count":0
}
}
]
}
]
}
}
i want to use icon to show icon in imageview. please suggest me how can i get this icon value and how can i user this icon url in imageview.
Thank you in advance.
i am trying this, but still it is creating error:-
this is my code:- but still is creating error:-
JSONArray groups= (JSONArray) jsonObj.getJSONObject("response").getJSONArray("groups");
int length= groups.length(); if (length > 0){ for (int i = 0; i < length; i++)
{
JSONObject group= (JSONObject) groups.get(i); JSONArray items =(JSONArray) group.getJSONArray("items");
for (int j = 0; j < items.length(); j++)
{
JSONObject item = (JSONObject) items.get(j);
JSONObject iconobject=(JSONObject) item.getJSONObject("categories");//this is creating error that JSON.typeMismatch
venue.icon=iconobject.getString("icon");
}}}}

The class JSONObject can help you:
String data = ... // your json data
JSONObject json = new JSONObject(data);
You can access nodes in your structure with help of getJSONObject(String) and getJSONArray(String).
For example:
JSONObject response = json.getJSONObject("response");
JSONArray groups = response.getJSONArray("groups");
JSONObject firstGroup = groups.getJSONObject(0);
// and so on
When you got your node that contains your icon value you can use the getString(String) method to get the icon url:
JSONObject firstCategory = categories.getJSONObject(0);
String iconUrl = firstCategory.getString("icon");
After you got the url you have to download the image before you can use it. How to download an image from an url is described here
When you downloaded the image you can update the imageview:
Bitmap image = loadBitmap(iconUrl); // how to implement loadBitmap is shown in the link above
ImageView iv = findViewById(R.id.my_imageview);
iv.setImageBitamp(image);

Try this:
try {
JSONArray jArray = new JSONArray(result);
// get into the 'groups' array
JSONObject jData = jArray.getJSONObject(0);
JSONArray jGroupsArray = jData.getJSONArray("groups");
// get into the 'items' array
jData = jArray.getJSONObject(2);
JSONArray jItemsArray = jData.getJSONArray("items");
// get into the 'categories' array
jData = jArray.getJSONObject(4);
JSONArray jCategoriesArray = jData.getJSONArray("categories");
// get into the 'icon' value as String and use it as you please
jData = jArray.getJSONObject(4);
String iconURL = jData.getString("icon");
} catch (JSONException e) {
Log.e(Constants.LOG_TAG, "Error parsing data", e);
}
Hope this helps

Refer to the JSON documentation: http://www.json.org/javadoc/org/json/package-summary.html. It's really simple.
In your case, you would have to read the JSON string to a JSON object, then parse "response" as a JSONObject, "groups" as a JSONArray inside "response", iterate through the JSONObjects contained in the "groups" array, parse "Items" as a JSONArray inside your JSONObject, and son on...
You should be able to get to the URL in no time.

Related

JSON Reading Object Values

I have a JSON response from Spotify that I'm trying to read from. And in my java code I am getting the 'name' value for the album object, and not for the tracked object. Here is the response: https://pastebin.com/fcvTzJJv
Towards the bottom of the JSON Response, there is a name field that says "Money in the Grave", that is what I want to get from the JSON, instead of "The Best in the world pack" which is under the name of the album.
Here is the code that reads this response:
try
{
JSONObject obj = new JSONObject(result);
JSONObject tracks = obj.getJSONObject("tracks");
JSONArray items = tracks.getJSONArray("items");
for(int i = 0; i < items.length(); i++)
{
//album object
JSONObject album = items.getJSONObject(i).getJSONObject("album");
//SHOULD be getting the images array but does not
//artist array
JSONArray artists = album.getJSONArray("artists");
//gets the necessary artist information
for(int j = 0; j < artists.length(); j++)
{
JSONObject artist = artists.getJSONObject(j);
songLists.add(artist.getString("name") + " - " +album.getString("name"));
}
}
}
With the above code, I'm getting "The Best in the World Pack", and not "Money in the Grave". Could someone help explain how to get the track's name, and not the albums name. Thanks
for(int i = 0; i < items.length(); i++)
{
JSONObject values = items.getJSONObject(i);
String name= values.getString("name");
System.out.println(name+" nameee");
//artist array
JSONArray artists = album.getJSONArray("artists");
}
this will work for you and will return "Money In The Grave (Drake ft. Rick Ross)"
You can try like this and it will give that track name
String response = yourJSonData;
try {
JSONObject jsonObject = new JSONObject(response);
Log.e("data","data---"+response);
JSONArray jsArrItems = jsonObject.getJSONObject("tracks").getJSONArray("items");
Log.e("data","data---222>>"+jsArrItems.getJSONObject(0).getString("name")+"<<>>"+jsArrItems);
} catch (JSONException e) {
e.printStackTrace();
}
If you have items as JSONArray more than 1 then can use the loop as well
get name like tems.getJSONObject(i).getString("name") in your items loop as name you are looking is in items array object not in artist object.

Json array inside array retrieve values Android

i m trying to get values from JSONArray inside array, i m able to retrieve whole JSON values into JSONArray successfully but not able to retrieve values inside JSONArray. When i convert JSONArray to JSONObject to get values stored inside JSONArray. It gives error: org.json.JSONException: No value for "banner"
Here is JSON code, i verified JSON code with jsonlint.com and it showed JSON is Validate,
[
{"code":"banner","moduletitle":0,
"banner":
[
{"image":"http://imageurl"},
{"image":"http://imageurl"},
{"image":"http://imageurl"}
]
}
]
I m trying to get this from 3 hour but no luck. i m new in JSON and do not know how JSON Actually work, and also read abut GSON Library to get JSON values. here is My Java code.
JSONArray jsonObj = null;
String image_url = "";
String banner_code ="";
try {
jsonObj =new JSONArray(lib_function.getJSONUrl( jsontags.Top_Banner_JOSN_URLs));
Log.d("value retrun :","" +jsonObj);
//---vlaue is coming and print in Log ----//
} catch (JSONException e) {
Log.v("Error in Parser :", " " + e);
Log.d("no value retrun :", "failed to convert");
}
try{
JSONObject jo = new JSONObject();
JSONArray ja = new JSONArray();
// populate the array
jo.put("arrayName", jsonObj);
JSONArray subArray = jo.getJSONArray("banner");
image_url= subArray.getString(Integer.parseInt("image"));
Log.d("banner code",""+subArray);
}catch(Exception e)
{
Log.d("not working",""+e);
}
I folllow this question but luck:
How to parse JSON Array inside another JSON Array in Android
If anyone suggest, what i m doing wrong will be appreciate. or let me know, where i can get more information about json
UPDATE thanks too all to give their precious time for answering my stupid question. All answers are correct , but i can accept only one answer. A Big thanks to all
Here:
JSONObject jo = new JSONObject();
JSONArray ja = new JSONArray();
// populate the array
jo.put("arrayName", jsonObj);
Because parsing jsonObj JSONArray so no need to create new JSONArray and JSONObject to extract it from jsonObj. remove all above three lines.
banner JSONArray is inside JSONObject which is contained by jsonObj JSONArray, get it as:
JSONObject jsonObject=jsonObj.optJSONObject(0);
JSONArray subArray = jsonObject.getJSONArray("banner");
// get code key from `jsonObject`
String strCode=jsonObject.optString("code");
// get all images urls from `subArray`
for(int index=0;index<subArray.length();index++){
JSONObject imgJSONObject=subArray.optJSONObject(index);
// get image urls
String strImgURL=imgJSONObject.optString("image");
}
Also, if jsonObj JSONArray contains multiple JSONObject's then use for-loop to iterate it.
I am assuming you have the rest of the values accessible to you, so posting just this snippet.
code=jsonObject.getString("code");
moduletitle=jsonObject.getString("moduletitle");
banner=jsonObject.getJSONArray("banner");
jsonObj =new JSONArray(lib_function.getJSONUrl( jsontags.Top_Banner_JOSN_URLs);
From above line you will get JSONArray. So now loop it and get you banner JSONArray.Again loop bannerArray and you will get image Urls
If You want value of "image" which is in json arrray than
String response = "your response";
try{
JsonArray jAry = new JsonArray(response);
JsonObject jObj = jAry.getJsonObject(0);
JsonArray jsonBanner = jObj.getJsonArray("banner");
JsonObject temp;
for(int i=0;i<jsonBanner.length;i++){
temp = jsonBanner.getJsonObject(i);
String image = temp.optString("image");
}
}

Parse JSON object to string in java

I am a newbie to json parsing, I have grabbed a json string from a request and now I need to parse it with java. I'm using simple-lib for this. But I'm really stuck as I'm not familiar with it. I need to extract following data
I used following java code for that but it's not giving me the result I need, please someone help me...
JSONParser parser = new JSONParser();
try {
Object obj = parser.parse(new FileReader("test.json"));
JSONObject jsonObject = (JSONObject) obj;
JSONArray msg = (JSONArray) jsonObject.get("content");
Iterator<String> iterator = msg.iterator();
while(iterator.hasNext()) {
System.out.println(iterator.next());
}
Sample JSON
{
"status": 200,
"message": "ok",
"timestamp": "2014-05-22T14:29:56.824+03:00",
"pagesCount": 1,
"version": "1.1",
"pages": [
{
"number": 100,
"subpages": [
{
"number": 1,
"timestamp": "2014-05-22T13:41:41.116+03:00",
"content": "text"
},
Something like this perhaps?
JSONParser parser = new JSONParser();
JSONObject jsonObject = (JSONObject) parser.parse(new FileReader("test.json"));
JSONArray pages = (JSONArray) jsonObject.get("pages");
if (pages != null) {
for (Object p : pages) {
JSONObject page = (JSONObject) p;
JSONArray subPages = (JSONArray) page.get("subpages");
if (subPages != null) {
for (Object sp : subPages) {
JSONObject subPage = (JSONObject) sp;
System.err.println(subPage.get("content"));
}
}
}
}
You are requesting for the value that corresponds to the key content from your outermost object, but no such key exists in your sample input. In addition, the only field named content has a string as its value and not a JSON array.
To get at the content field you would need to walk the object hierarchy until you reach the element that you need, using something along these lines:
JSONParser parser = new JSONParser();
JSONObject json = (JSONObject) parser.parse(new FileReader("test.json"));
JSONArray pages = (JSONArray) json.get("pages");
// Page 10
JSONObject page = (JSONObject) pages.get(10);
// Subpages of page 10
JSONArray subpages = (JSONArray) page.get("subpages");
// Subpage 7 of page 10
JSONObject subpage = (JSONObject) subpages.get(10);
// Content of subpage 7 of page 10
String content = (String) subpage.get("content");
Please note that I am assuming that e.g. index 10 corresponds to page 10. That may not be true in your case; pages may not be zero-indexed, there may be missing pages or they may not be in the correct order. In that case you will have to iterate over the page and subpage lists and test the value of the number field to find the object that you need.
In any case, if you are indeed using json-simple, as seems to be the case, then JSONObject is a subclass of HashMap and JSONArray a subclass of ArrayList. Therefore, their interfaces should be quite familiar to you.
Disclaimer: Untested code - exception and other error handling removed for brevity
First of all, The json is not valid (if you pasted it complete)
In JSON "{}" is an object, and "[]" is an array, others are just key value pairs.
Simply you can do like this without using parser ,
JSONObject objResponseJSON = new JSONObject(responseJSONString);
int status = (int) objResponseJSON.getInt("status");
//fetch other
JSONArray pages = objResponseJSON.getJSONArray("pages");
for(int count = 0; count < pages.length(); count++){
//fetch other
JSONObject objJSON = pages.getJSONObject(count);
JSONArray subpages = objJSON.getJSONArray("subpages");
for(int count1 = 0; count1 < subpages.length(); count1++){
JSONObject objSubpageJSON = subpages.getJSONObject(count1);
//fetch other
int number = (int) objSubpageJSON.getInt("number");
}
}

Issue With JSON Object in Java?

I have a JSON Object which converted into String and saved into database .But when i am trying to get it back it is throwing exception.My object is something like that...
{"COLUMN":["Type","Sub Type","F.P.","P.P.","Process","Due To Start"]}
How can we get the data back in Normal form?
My Java Code is.....
JSONObject obj = new JSONObject();
JSONArray the_json_array = obj.getJSONArray(userReorderOption);
int size = the_json_array.size();
ArrayList<JSONObject> arrays = new ArrayList<JSONObject>();
for (int i = 0; i < size; i++) {
JSONObject another_json_object = the_json_array.getJSONObject(i);
arrays.add(another_json_object);
}
And Exception i am getting....
net.sf.json.JSONException: JSONObject["{\"TASKLIST_COLUMN_REORDER\":[\"Type\",\"Sub Type\",\"F.P.\",\"P.P.\",\"Process\",\"Due To Start\"]}"] is not a JSONArray.
And this is java Code how i am creating JSON Object and saving into database...
String userReorderSelection;
Set set = new LinkedHashSet(userReorderSelection);
JSONObject json = new JSONObject();
json.accumulate("COLUMN", set);
saveJSONObj("PrimaryKeyColumn", json.toString());
Thanks Tichodroma,
But as i told i am using net.sf.json.JSONObject class and above things we can achieve from this class too..What i did to solve the above issue?...Please have a look on the Java code...
JSONObject jsonObj = new JSONObject();
JSONObject obj = jsonObj.fromObject(userReorderOption);
JSONArray columnName = (JSONArray) obj.get("COLUMN");
for (int i = 0; i < columnName.size(); i++) {
System.out.println(columnName.getString(i));
}
This code work fine for me with my Json Jar**(net.sf.json)**
Your JSON is not a JSONArray.
A JSONArray is an ordered sequence of values.
You have a JSONObject.
A JSONObject is an unordered collection of name/value pairs.
Edit:
Using the JSON implementation from org.codehaus.jettison.json, you can do this:
String json = "{\"COLUMN\":[\"Type\",\"Sub Type\",\"F.P.\",\"P.P.\",\"Process\",\"Due To Start\"]}";
JSONObject obj = new JSONObject(json);
JSONArray column = (JSONArray) obj.get("COLUMN");
for (int i = 0; i < column.length(); i++) {
final String field = column.getString(i);
System.out.println(field);
}
Result:
Type
Sub Type
F.P.
P.P.
Process
Due To Start

json in java getting the correct values from a list

I am using the package org.json package: I need help with getting the corect data from the json in java. this is the string I have in json:
{"GetLocationsResult":[{"ID":82,"Name":"Malmo","isCity":true,"isCounty":false,"isDisctrict":false,"ID_Parent":null,"ID_Map":35,"ZipCode":"7000"},{"ID":82,"Name":"Trelleborg","isCity":true,"isCounty":false,"isDisctrict":false,"ID_Parent":null,"ID_Map":35,"ZipCode":"7000"}]}
This is a listing and this is just a test, it will contain more than 2 items, so my questions is, I want to get the name of all locations, I want to populate a spinner with names in my android app.
How can I get the "Name":"Malmo" and so on....
???
The answer is simple....The JSON element starts with a { which is a JSON Object, and GetLocationsResults is a JSON Array of JSON Objects. In essence, I translated the JSON String to the following code...
JSONObject rootJson = new JSONObject(jsonString);
JSONArray jsonArray = rootJson.getJSONArray("GetLocationsResult");
//Let's assume we need names....
String[] names = null;
if (jsonArray != null) {
names = new String[jsonArray.length()];
for (int i = 0; i < jsonArray.length(); i++) {
JSONObject json = jsonArray.getJSONObject(i);
names[i] = json.getString("Name");
}
}
//Test
for (String name: names) {
System.out.println(name);
}

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