Adding element to JSON in Android Eclipse

Question

I m using Eclipse and Android project. I have parsed the JSON and have contents as String. I have a JSON like:

{        
"state":{
"updated":"2012-07-16T19:20:30",
"value":604,
"variables":{
    "var1":12,
    "var2":47,
    "var3":77,
    "var4":77
    }
} 
}

I want to add "var5":value to JSON in Android. The value could be String, decimal,array, integer etc. I want to have the updated JSON as String. Can anyone help me?

jeet · Accepted Answer · 2012-09-20 09:22:31Z

2

Create a new JSONObject from the String by:

String str="{        
"state":{
"updated":"2012-07-16T19:20:30",
"value":604,
"variables":{
    "var1":12,
    "var2":47,
    "var3":77,
    "var4":77
    }
} 
}";
JSONObject jsonObject=new JSONObject(str);

now get JSONObject with key "variables" from this object by:

JSONObject variables=jsonObject.getJSONObject("variables");

to add a new value to this JSONObject use:

variables.put("var5", newValue);

now put this json object variables to jsonObject.

jsonObject.put("variables", variables);

and get This jsonObject as a String:

String strResult=jsonObject.toString();

edited Sep 20, 2012 at 9:22

answered Sep 20, 2012 at 8:52

jeet

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3 Comments

user1637909 Over a year ago

Ya I have done that. I have the old JSON contents in a String. But, how will I get the updated JSON as String(as I have to put it on server)? I m new to Android, so pls help even if my question is simple @jeet

njzk2 Over a year ago

you did that? you could have said.

user1637909 Over a year ago

I have iterated and able to see the new value in LogCat. But just want to know how will get a String variable of my new JSON?

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