Parsing JSON Data (Android)

Question

Alright. I have a JSON Object sent to me from a server which contains the following data:

{
    "result":
    [
        {"status":"green","type":"data1"},
        {"status":"green","type":"data2"},
        {"status":"green","type":"data3"}
    ],
    "status":"ok"
}

The data I want to get is the status for the three status values. Data1, data2, and data3 always show up in that order, so I'm now trying to grab the data by index (e.g. data1 = index 0, data2 = index 1, data3 = index 2). How do I do that?

I'm thinking of using a JSONArray to grab the stuff in result. (result.getJSONObject("result").getJSONArray("result").getString(0)). Will that work? — Aneesh Ashutosh, Jul 25 '13 at 17:02

score 1 · Accepted Answer · answered Jul 25 '13 at 17:04

1

Try following:

String stat1;
String stat2;
String stat3;
JSONObject ret; //contains the original response
//Parse to get the value
try {
    stat1 = ret.getJSONArray("results").getJSONObject(0).getString("status");
    stat2 = ret.getJSONArray("results").getJSONObject(1).getString("status");
    stat3 = ret.getJSONArray("results").getJSONObject(2).getString("status");
} catch (JSONException e1) {
    e1.printStackTrace();

}

answered Jul 25 '13 at 17:04

Shobhit Puri

25,769
11
95
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Perhaps instead of hardcoding the `getJSONObject`, loop over it? – jlindenbaum Jul 25 '13 at 17:07
Yup, that did it :D Thanks!! I'll vote as best answer when the site lets me (~5 minutes). – Aneesh Ashutosh Jul 25 '13 at 17:07
@jlindenbaum Yes, sure it can be done. He seems to have just 3 of them, so I hardcoded it to show how it can be done. If there ae more then it can be looped over. You are extremely correct. – Shobhit Puri Jul 25 '13 at 17:09

Tonithy · Answer 2 · 2013-07-25T17:29:12.140

You would use JSONObject and JSONArray, the entire string is one JSONObject so you would construct one with it.

JSONObject object = new JSONObject(YOUR_STRING_OF_JSON);

Then you can access it with different get methods depending upon your expected type.

JSONArray results = object.getJSONArray("result"); // This is the node name.
String status = object.getString("status");

for (int i = 0; i < results.length(); i++) {
    String resultStatus = results.getJSONObject(i).getString("status");
    String type = results.getJSONObject(i).getString("type");
    Log.w("JSON Result #" + i, "Status: " + resultStatus + " Type: " + type);
}

You need to surround it with a try/catch because JSON access can throw a JSONException.

This came in handy a little bit later in the project where there was a JSON I had to parse where I didn't know how long it would be :P Thanks!! — Aneesh Ashutosh, Jul 26 '13 at 01:28

score 1 · Answer 3 · answered Jul 25 '13 at 17:39

Try re-factoring via a forEach loop

var testData = 
{   
    "result":
    [   
        {"status":"green","type":"data1"},
        {"status":"green","type":"data2"},
        {"status":"green","type":"data3"}
    ],  
    "status":"ok"
};  


var output      = new Object;
var resultSet   = new Object;
    resultSet   = testData.result;

resultSet.forEach(function(data)
{   
    theStatus = data['status'];
    theType   = data['type']

    output[theType] = theStatus;
}); 

console.log( output['data1'] );

score 0 · Answer 4 · edited May 23 '17 at 12:21

0

If you've got your models setup to mirror that data set, then you can let GSON (https://code.google.com/p/google-gson/) do a lot of your work for you.

If you want a bit more control, and want to parse the set yourself you can use JSONObject, JSONArray. There's an example of parsing and assembling a json string here: Android create a JSON array of JSON Objects

edited May 23 '17 at 12:21

Community

1
1

answered Jul 25 '13 at 17:01

jlindenbaum

1,891
18
28

The issue I'm having, though, is that none of the arrays are named aside from the initial result array, so I don't know how to look inside them :/ – Aneesh Ashutosh Jul 25 '13 at 17:05
Based off what you've posted you know the name of the first array, the others are JSONObjects, that you can get out of the array. Once you have JSONObjects you know the name of the keys and can pull the value out as you please. – jlindenbaum Jul 25 '13 at 17:08

Parsing JSON Data (Android)

4 Answers4