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up vote 1 down vote favorite

My Json is:

{
"Response":{
"Asset":[
{
"id":2461,
"name":"TestAsset7771",
"model_name":"TestModel777",
"serial_number":"TestAsset7771",
"current_data":{
"timestamp":"",
"name":"Temperature",
"value":"?"
}
},
{
"id":2448,
"model_id":1229,
"name":"TestAsset777",
"model_name":"TestModel777",
"serial_number":"TestAsset777",
"current_data":{
"timestamp":"",
"name":"Temperature",
"value":"?"
}
}
]
}
}

My code is:

 JSONObject outerObject = new JSONObject(jsonObj.toString());
JSONObject innerObject = outerObject.getJSONObject("Response");
JSONArray jsonArray = innerObject.getJSONArray("Asset");
for (int i = 0, size = jsonArray.length(); i < size; i++)
{
  JSONObject objectInArray = jsonArray.getJSONObject(i);
  String[] elementNames = JSONObject.getNames(objectInArray)
  for (String elementName : elementNames)
  {
    String value = objectInArray.getString(elementName);
    System.out.printf("name=%s, value=%s\n", elementName, value);
  }
}

For inner array - ie current data, am getting values as:

name=current_data, value={"timestamp":"","name":"Temperature","value":"?"}

How can i put another inner array so that i can get values of "timestamp":"", "name":"Temperature", "value":"?" in separate variables instead of complete JSON

share|improve this question
    
Uh, "value" is a map. Extract the entries from the map. –  Hot Licks Oct 30 '13 at 15:23
    
value is json again.. –  user2572739 Oct 30 '13 at 15:26
    
If the above JSON listing is accurate and you used a plain JSON parser, the value of "current_data" will be a Map. For the particular JSON parser you're using the form of Map would be a JSONObject. Access the elements just as you'd access any other Map. –  Hot Licks Oct 30 '13 at 15:57
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4 Answers

up vote 1 down vote

Its better to use Gson to parse JSON. Anyway, if you decide to follow as this is, try as :

You have a class like this:

class CurrentData{
  String name,timestamp,value;
  void print(){
    System.out.printf("name=%s, timestamp=%s, value=%s\n", name,timestamp, value);
  }
}

Now, change your for loop as follows:

 for (String elementName : elementNames)
  {
    if(!elementName.equals("current_data")){
    String value = objectInArray.getString(elementName);
    System.out.printf("name=%s, value=%s\n", elementName, value);
    }
    else{
    CurrentData obj=new CurrentData();// You can use array of objects declaring outside the loop as your need
    JSONObject curr_object=objectInArray.getJSONObject("current_data");
    obj.name=curr_object.getString("name");
    obj.timestamp=curr_object.getString("timestamp");
    obj.value=curr_object.getString("value");
    obj.print();
    }
  }
share|improve this answer
    
using GSON to parse is a good idea.. let me try that once.. –  user2572739 Oct 30 '13 at 15:54
    
That's good. Happy coding :) –  Nizam Oct 30 '13 at 15:57
    
Why iterate through elementNames vs just accessing objectInArray.getJSONObject("current_data")?? –  Hot Licks Oct 30 '13 at 16:01
    
@HotLicks He/She wrote iteration, not for "current_data", but for other elements. Just look for "model_id" for example. –  Nizam Oct 30 '13 at 16:09
    
Except why iterate on Map elements? You presumably want specific values and no sense going through values you don't want. –  Hot Licks Oct 30 '13 at 16:54
show 3 more comments
up vote 0 down vote 
for (String elementName : elementNames)
  {
  JSONObject jsonobject = jsonarray.getJSONObject(elementName);

    System.out.printf( "name=%s, value=%s\n",jsonobject.getString("name"),jsonobject.getString("value"));

  }
share|improve this answer
    
You're not accessing "current_data" first. –  Hot Licks Oct 30 '13 at 16:08
    
@HotLicks thanks you are right. –  Nambi Narayanan Oct 30 '13 at 16:11
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up vote 0 down vote

"value" is another jason object, so you can just call "getJasonObject()" to obtain the item and then proceed with that new array as normal.

Edit: I made a fail (not enough C0FFEE in my memory) and corrected thanks to the comment.

share|improve this answer
    
Actually it's a JSON object -> JSONObject -> Map. –  Hot Licks Oct 30 '13 at 15:58
    
Yes, I find that COFFEE has a very narrow value range -- easy to underflow and overflow. –  Hot Licks Oct 30 '13 at 16:56
add comment
up vote 0 down vote 
JSONObject outerObject = new JSONObject(jsonObj.toString());
JSONObject innerObject = outerObject.getJSONObject("Response");
JSONArray jsonArray = innerObject.getJSONArray("Asset");
for (int i = 0, size = jsonArray.length(); i < size; i++) {
  JSONObject objectInArray = jsonArray.getJSONObject(i);
  JSONObject currentData = objectInArray.getJSONObject("current_data");
  if (currentData != null) {
      String timestamp = currentData.getString("timestamp");
      String name = currentData.getString("name");
      String value = currentData.getString("value");
      // Assign above results to array elements or whatever
  }

}

share|improve this answer
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