hello i have a JSON data format can anyone please help me to make dynamic JSONStringer object for this String
{"Text":"Hello Simple Text",
"Files":[{"ContentType":"image/png",
"Content":"iVBORw0KGgoAAAANSUhEUgAAAR8AAACMCAIAAADKsDpDAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAB3RJTUUH2wYWDzIB3zSYdQAAAAd0RVh0QXV0aG9yAKmuzEgAAAAMdEVYdERlc2NyaXB0aW9uABMJISMAAAAKdEVYdENvcHlyaWdodACsD8w6AAAADnRFWHRDcmVhdGlvbiB0aW1lADX3DwkAAAAJdEVYdFNvZnR3YXJlAF1w/zoAAAALdEVYdERpc2NsYWltZXIAt8C0jwAAAAh0RVh0V2FybmluZwDAG+aHAAAAB3RFWHRTb3VyY2UA9f+D6wAAAAh0RVh0Q29tbWVudAD2zJa/AAAABnRFWHRUaXRsZQCo7tInAAABAElEQVR4nO2de1zUVf7/3+dzmwsMoCgDXgARBO/"}],
"AuthToken":"XkWQRd65+H+iPtlOoAEYAR0jrzB1o3UV"}
i have used
jsonstr = new JSONStringer().object().key("Text")
.value(msg).key("Files").array().object().key(
"ContentType").value("image/png").key(
"Content").value(enimg)
.endObject().endArray().key("AuthToken").value(token)
.endObject();
but the server is giving me fault message in return, not accepting the data.
actually i was doing the right thing..everything was OK..
the problem was with org.json package it was not accurate with Base64 string
i switched to another library and all worked..
https://stackoverflow.com/questions/338586/a-better-java-json-library
see the above question for another json libraries
that was problem with org.json
i switched to another..and all it works
nesting too deep in JSON... should I switch to XML?
This is a way to do what you want:
// Creating root JSONObject
JSONObject json = new JSONObject();
// Put in it a String field
json.put("Text", "Hello sample");
// Creating a JSONArray
JSONArray arr = new JSONArray();
//Creating the element to populate the array
JSONObject element = new JSONObject();
element.put("ContentType","image/png");
element.put("Content","iVBORw0K...gDXgARBO/");
// Put it in the array
arr.put(element);
// Put the array and other fileds in the root JSONObject
json.put("Files", arr);
json.put("AuthToken", "XkWQ...o3UV");
// Get the JSON String
String s = json.toString();
// Get formatted and indented JSON String
String s2 = json.toString(4);
// 4 is the number of spaces to indent the string
You can use JSONObject class for this purpose
http://developer.android.com/reference/org/json/JSONObject.html
Related
I want to parse json from a url and use the json data with a listview.
I also want to only list the score and the name, but I have no idea how. Thanks.
{
"level":[
{
"id":1,
"server":[
{"score":33,"name":"Car"},
{"score":72,"name":"Bus"},
]
}
]
}
Do you know how to retrieve the data?
After you retrieve the data, parsing it is very simple. To get each individual item with its attributes I would use the following code:
String responseFromUrl;
JSONObject JSONResponse = new JSONObject(responseFromURL);
JSONArray level = JSONResponse.getJSONArray("level");
//The following loop goes through each object in "level". This is nessecary if there are multiple objects in "level".
for(int i=0; i<level.length(); i++){
JSONObject object = level.get(i);
int id = object.getInteger("id");
JSONArray server = object.getJSONArray("server");
//This second loop gets the score and name for each object in "server"
for(int j=0; j<server.length(); j++){
JSONObject serverObject = server.get(i);
int score = serverObject.getInteger("score");
String name = serverObject.getString("name");
}
}
Obviously replace "responseFromUrl" with the JSON response from the url in string format. If you don't know why I used JSONObject, JSONArray, String, Integer, etc., or are just confused about this, Udacity has a good course for making http connections and parsing JSON responses from APIs.
Link to Udacity Course
You can use the gson library to convert json to an java object
Download the latest jar and import into your project, currently you can download the latest at this link:
https://repo1.maven.org/maven2/com/google/code/gson/gson/2.8.1/gson-2.8.1.jar
After, this will help you:
https://stackoverflow.com/a/23071080/4508758
Hugs!
I have a scenario where I need only 1 objects out of the entire json.
{"id":"1","first_name":"Steve","last_name":"Holt","user_type":"Teacher","user_key_area":"Math"}
In above I want to extract user_type.
How will I do?
You can use Google GSON to parse the json response and map it to the model directly . Here is the tutorial for the same TUTORIAL
Use this to extract the user_type from the json, pass the your json response in place of response variable.
JsonObject object =new JsonObject(response);
String user_type = object.getString("user_type");
You are getting this json in response you can get 1 object like this:
String value = response.getString("Key Name");
Get Response and that create JsonObject
JsonObject jsonObject =new JsonObject(res);
Create String object and pass string parameter "user_type"
String userType = jsonObject.getString("user_type");
Hi i want to change/alter value of a string inside a json object which inside a JSONArray and which is from a file stored in internal storage.
My initial thoughts are to convert the object to a string do a find a replace and convert back to JSONObject search the JSONArray for the JSONObject remove the old one and put the new one in. Then save the array as a .JSON File to internal storage (will this replace the file thats already there or will it create another file with the same name?).
This is my initial thoughts on how to do this but is this the correct way or is there easier more efficient way to do this?
First, you need to retrieve the required JSON Object form the JSON Array.
You can update the key-value pair of your JSON Object directly by using
mJsonObj.put("<key>", <value>).
try using this :
nameValuePairs.add(new BasicNameValuePair("cus_id", cus_id));
getting data in this:
JSONObject json = new JSONObject(responseString);
JSONArray jArray = json.getJSONArray("customer");
for (int i = 0; i < jArray.length(); i++) {
JSONObject json_data = jArray.getJSONObject(i);
cus_points = json_data.getString("cus_points");
Depends on the library you are using for parsing JSON. Some do allow code like jsonOArray.get("jsonObject").put("key", "val");
Some require to obtain the object first then do something like
JsonObj = jsonArray.get("jsonObject"); jsonObj.putVal("key", "val");
Which library do you use for processing json?
Example JSON Page
http://maps.googleapis.com/maps/api/geocode/json?latlng=51.155455,-0.165058&sensor=true
#SuppressLint("NewApi")
public void readAndParseJSON(String in) {
try {
JSONObject reader = new JSONObject(in);
// This works and returns address
JSONArray resultArry = reader.getJSONArray("results");
String Address = resultArry.getJSONObject(1).getString("formatted_address").toString();
Log.e("Address", Address);
// Trying to get PostCode on code below - this is not working (log says no value at address components)
JSONArray postCodeArray = reader.getJSONArray("address_components");
String postCode = postCodeArray.getJSONObject(1).getString("long_name").toString();
Log.e("PostCode", postCode );
This code returns the address correctly. How can I get the post code long_name which is inside address_components?
Solution
I had to get each array, and then get the post code value.
I am using the value 7, as that is the JSONObject that has the postcode stored in the "long_name" field.
JSONObject readerJsonObject = new JSONObject(in);
readerJsonObject.getJSONArray("results");
JSONArray resultsJsonArray = readerJsonObject.getJSONArray("results");
JSONArray postCodeJsonArray = resultsJsonArray.getJSONObject(0).getJSONArray("address_components");
String postCodeString = postCodeJsonArray.getJSONObject(7).getString("long_name").toString();
Log.e("TAG", postCodeString);
Hope that helps.
reader.getJSONObject(1).getJSONArray("address_components");
Your problem is that results is a JSONArray that contains a child JSONObject composed of several children: "address_components", "formatted_address", "geometry", and "types". The result array actually contains many of these such objects, but let's focus on just the first child for now.
Look carefully at your code. With this line:
JSONArray resultArry = reader.getJSONArray("results");
You are getting the entire results. Later on, you then call the same method again:
JSONArray postCodeArray = reader.getJSONArray("address_components");
But you're asking for an "address_components" from the reader, where I do not expect you'll find anything (having already read the entire result before.) You should instead be working with the JSONArray you already got before, since it already contains the entire result.
Try something like:
JSONObject addressComponents = resultArry.getJSONObject(1).getJSONObject("address_components");
String postCode = addressComponents.getString("long_name");
Note: I don't know why you're singling out JSONObject #1 (as opposed to 0, which is the first, or any other one of them) and I also am not sure why you named the String postCode. So if I've misunderstood your intention, I apologize.
Is difficult to find the error... because all looks well. The problem maybe can exist when you make the json.put("address_components", something);
So my advice is put a breakpoint at this line
JSONArray postCodeArray = reader.getJSONArray("address_components");
o display the json in logcat
Log.d("Simple", reader.toString());
Then Paste your json in this web page to view more pretty
http://jsonviewer.stack.hu/
and check if all keys are stored well.
Solution
Need to get each array, and then get the post code value. The value 7 is used, as that is the JSONObject that has the postcode stored in the "long_name" field.
JSONObject readerJsonObject = new JSONObject(in);
readerJsonObject.getJSONArray("results");
JSONArray resultsJsonArray = readerJsonObject.getJSONArray("results");
JSONArray postCodeJsonArray = resultsJsonArray.getJSONObject(0).getJSONArray("address_components");
String postCodeString = postCodeJsonArray.getJSONObject(7).getString("long_name").toString();
Log.e("TAG", postCodeString);
Hope that helps.
Okay I am quering data from a Grails webservice that returns JSON. The JSON when viewed with the JSONViewer app parses fine. When I take that same string and use JSONObject(string) in my Android app I get "value of String cannot be converted to JSONObject."
Here's my JSON string
[[{"class":"mygrails.TopTen","id":491,"ttAmount":14200000,"ttMlId":402,"ttRank":1,"ttWeekId":1108},{"class":"mygrails.MovieList","id":402,"mlApproved":1,"mlApprovedId":5,"mlMovieId":"GNOMEOAN","mlReleaseDate":"2011-03-08T07:41:45Z","mlTitle":"Gnomeo and Juliet","mlWeekId":1106}]]
Now the JSON is comes from the standard JSON conversion of a SQL data using render from the groovy file through the import grails.converters.JSON.
... //(call to render JSON in the groovy file)
def a
a = Table.findAll("from someTable as st where st.id=" params.id)
render a as JSON
...
So I am not sure what I doing wrong and why the JSON looks a little off to me. (still new to JSON)
In json if you see "[]" means its a json array and if you see "{}" it is an json object. Both of then can have the other nested inside then.
In your case the string the starts with json array.
So try something like the following
String str = "[[{"class":"mygrails.TopTen","id":491,"ttAmount":14200000,"ttMlId":402,"ttRank":1,"ttWeekId":1108},{"class":"mygrails.MovieList","id":402,"mlApproved":1,"mlApprovedId":5,"mlMovieId":"GNOMEOAN","mlReleaseDate":"2011-03-08T07:41:45Z","mlTitle":"Gnomeo and Juliet","mlWeekId":1106}]]";
JSONArray jsonArray = new JSONArray(str);
jsonArray = jsonArray.getJSONArray(0);
JSONObject jsonObject = jsonArray.getJSONObject(0);
String class = jsonObject.getString("class"); // class will value "mygrails.TopTen"
Try to create an JSONArray from the String instead of JSONObject. I didn't test this but that should do the trick: you have two nested arrays that contain then actual data.
Check out your JSON online with http://jsonformat.com/
http://www.freeformatter.com/json-formatter.html
JSON Viewer
http://jsonviewer.stack.hu/
Paste your text in there and you can see what you should parse: