Develop Reference

getJSONArray wrong format for {"GetProdByBizResult":{"TotalCount":4,"RootResults":[{....}]}}"

I successfully get data from wcf web service in my android studio app.
I get this format for the json response.
{"GetProdByBizResult":{"TotalCount":4,"RootResults":[{"catId":1348,"catOrder":1,...
what is the parameter that has to be provide in order to convert it to JSONArray ?
JSONArray jsonArray = jsonResponse.getJSONArray("RootResults");//this doesn't work
I found a workaround by replacing my json string to "RootResults":[{"....}]}"
then
jsonResponse.getJSONArray("RootResults");
is working perfect

{
"GetProdByBizResult": {
"TotalCount": 4,
"RootResults": [
{
"catId": 1348,
"catOrder": 1
}
]
}
}
Json array "RootResults" is a part of json object "GetProdByBizResult" so we need to take "GetProdByBizResult" josn object first and then from this object you can fetch the "RootResults" json array, like
JSONObject jsonObject = jsonResponse.getJSONObject("GetProdByBizResult");
JSONArray jsonArray = jsonObject.getJSONArray("RootResults");

JSON: Treat many objects as array of object

I have a JSON Like this
{ "video":{
"video_3745":{ },
"video_3437":{ },
"video_3471":{ },
"video_4114":{ }
}
}
In which every "video_xxxx" is of the SAME type. Is there a way to treat the "video" field as an array of that type? I need to iterate over all the videos, but the API is not sending them in an array, and I don't know how to model a class to receive this JSON without having to manually specify all the field names...
does GSON or LoganSquare have anything to help me out with this?

Try something like this
JSONObject video= json.getJSONObject("video"); // json is the whole response
Iterator x = video.keys();
JSONArray jsonArray = new JSONArray();
while (x.hasNext()){
String key = (String) x.next();
jsonArray.put(video.get(key));
}

You can't treat them as an array, but with the org.json.JSONObject class you can get the list of keys and iterate over them. I believe in GSON the JsonObject.entrySet method will allow something similar.
https://developer.android.com/reference/org/json/JSONObject.html
https://google.github.io/gson/apidocs/com/google/gson/JsonObject.html

how check is the json Array available and exist?

I'm loading a json array in my app.but i need to know if the json array is exist or not? because if the json array isn't exist, the app will crash.
for example, I have this json:
{
"music1":
[
{
"art":"",
"artist":"",
"music":"",
"flag":"",
"text":"",
"level":""
},
{
"art":"",
"artist":"",
"music":"",
"flag":"",
"text":"",
"level":""
},
]
}
and I want to know is there any json object named "music1" in my code or not, and then if there was I want to get the json array and show it in a list in my android app.
I'm looking forward a hero that could help me!

I wish this explanation would fit in a comment.
Anyway:
{
"music1":
[
{
"art":"",
"artist":"",
"music":"",
"flag":"",
"text":"",
"level":""
},
{
"art":"",
"artist":"",
"music":"",
"flag":"",
"text":"",
"level":""
}
]
}
Let call the above json object o.
So to check if o has music1, all you need to check is write the following line:
if(o.has("music1")){
JSONArray array= o.getJSONArray("music1");
}
Then you extract the objects of the json array :
for(int i=0;i<array.length();i++){
array.getJSONObject(i);
}

Check the availability of field:
if(jsonObj.has("music1")){
//yes
}
or this case:
JSONArray mJSONArray = jsonObj.optJSONArray("nmusic1");
If array is not available mJSONArray will be null

Getting the name of JSONArray as a string android

Hi, I have a JSONObject that has multiple arrays in it. I want to get the name of each array as a string does anyone know how I can do this?
Here's how my json looks. so the value I'm trying to get out is the name of the array so B or C in this case. the purpose of this is to set the text of a header on a list view to this value.
{"Contacts": //JSONObject
{
"B"://JSONArray..
[
{"ContactName":sdfsdf,"ID":900,"Number":1368349},
{"ContactName":adsdfd,"ID":1900,"Number":136856},
{"ContactName":adglkhdofg,"ID":600,"Number":136845}
],
"C":[
{"ContactName":alkghoi,"ID":900,"Number":1368349},
{"ContactName":wetete,"ID":1900,"Number":136856},
{"ContactName":dfhtfh,"ID":600,"Number":136845}
]
.....//and so on..
}
}

You can use the JSONObject method names() to return an array of the string names in the object.

How to parse this JSON object

This is the json response from my server . How can i parse it and store it in HashMap? Please help me.
{'records':
[{
'number':165,
'description': 'abcd'
},
{
'number':166,
'description': 'ab'
},
{
'number':167,
'description': 'abc'
}]
}

im new in android but maybe you can do something like this:
JSONObject JsonObject = new JSONObject(json);
JSONArray JsonArray_ = JsonObject .getJSONArray("records");
for (int i = 0; i < numberOfItems; i++) {
JSONObject record= JsonArray_photo.getJSONObject(i);
parsedObject.number = record.getString("number"); //its the same for all fields
map.add(parsedObject);
}
I done something like that for my own JSON parser. hope this helps. cheers

I suggest you look at the gson library, which makes it very easy indeed to parse JSON into an object representing the data. So you could create a Record object, with public member variables for number, description, and then use gson to parse the JSON into an object array.
http://code.google.com/p/google-gson/
Add the .jar to your libs folder and then use it like this:
Record[] records = new GsonBuilder().create().fromJson(jsonString,Record[].class)
int number = record[0].number;

The org.json package is included in Android: http://developer.android.com/reference/org/json/package-summary.html
Use is simple:
JSONObject json_object = new JSONObject(String json_string);
Each property can then be accessed as a Java property, e.g. json_object.property. It will throw a JSONException if the parsing fails for some reason (i.e., invalid JSON).

You can use Gson library, you can find full tutorial on softwarepassion.com