Parse JSONObject and JSONArray and fix them in the listview

Question

How to parse JSONArray inside JSONObject?. Here is the JSON response I'm getting from the server.

{
"searchdata": {
    "titles": [
        "<b>Laptop</b> - Wikipedia, the free encyclopedia",
        "<b>laptop</b> - definition of <b>laptop</b> by the Free Online Dictionary ..."
    ],
    "desc": [
        "A <b>laptop</b> computer is a personal computer for mobile use. A <b>laptop</b> has most of the same components as a desktop computer, including a display, a keyboard, a ...",
        "lap·top (l p t p) n. A portable computer small enough to use on one&apos;s lap. <b>laptop</b> [ˈlæpˌtɒp], <b>laptop</b> computer. n (Electronics &amp; Computer Science / Computer ..."
    ],
    "links": [
        "http://en.wikipedia.org/wiki/Laptop",
        "http://www.thefreedictionary.com/laptop"
    ],
    "nextpage": ""
}
}

I'm able to get JSONObject but how to get JSONArray one by one, so that I can fix them in the listview.

I want to show the values of each array in a single row of the listview and so on....

Any help will be appreciated.

You can use GSON library for JSON parsing (instead of doing it manually). Look at example here: javacodegeeks.com/2011/01/… — Piotr
– Piotr, Commented Feb 28, 2013 at 8:04

Nezam · Accepted Answer · 2013-02-28 07:39:15Z

1

Very easy..

you need to fix code like this:

//jsonString is your whole JSONString which you have shown above

JSONObject jObj = new JSONObject(jsonString);
JSONObject jSearchData = jObj.getJSONObject("searchdata");
JSONArray jTitles = jSearchData.getJSONArray("titles");
JSONArray jDesc= jSearchData.getJSONArray("desc");
JSONArray jLinks= jSearchData.getJSONArray("links");
String nextPage = jSearchData.getString("nextpage");
//and so on and so forth

For fetching the array items and show it into a listview:

//you can iterate over each item and add it to an ArrayList like this:

//i am showing you a single one,follow the same process for other arrays:

ArrayList titlesArray = new ArrayList();

for (int i = 0; i < jTitles.length(); i++) {
String item = jTitles.getString(i);
titlesArray.add(item);

}

Next you make this arraylist a source to a listview like this:

 // Get a handle to the list view
    ListView lv = (ListView) findViewById(R.id.ListView01);
 lv.setAdapter(new ArrayAdapter<string>((Your activity class).this,
            android.R.layout.simple_list_item_1, titlesArray));

edited Feb 28, 2013 at 7:39

answered Feb 28, 2013 at 7:23

Nezam

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5 Comments

Anupam Over a year ago

Hey Nezam, I have added each item in the array, so now how can I call those items in the listview. Can you help me with that?

Nezam Over a year ago

just set it to the adapter. Like.. in place of titlesArray supply your array in the last line of the code which i posted

Anupam Over a year ago

stackoverflow.com/questions/15131306/…

Anupam Over a year ago

Can you please check the question I have posted.

Nezam Over a year ago

If you would have followed my answer here.. you would not have needed to post a new question.Anyways,i answered there.Check it out.

Perception · Accepted Answer · 2013-02-28 07:36:12Z

1

Consider that your top level JSON will be parsed into a JSONObject, and that subsequently you can request to receive from it, any sub level objects and/or arrays via the methods getJSONObject(name) and getJSONArray(name). Your arrays of interest are two levels deep in the JSON hierarchy, so you will need something like this:

String json = ...;
JSONObject rootObj = new JSONObject(json);
JSONObject searchObj = rootObj.getJSONObject("searchdata");
JSONArray titlesObj = searchObj.getJSONArray("titles");
JSONArray descsObj = searchObj.getJSONArray("desc");
JSONArray linksObj = searchObj.getJSONArray("links");

You can iterate any of the arrays as such (using titles as an example):

for(int i = 0; i < titlesObj.length(); i++) {
    String title = titlesObj.getString(i);
}

edited Feb 28, 2013 at 7:36

answered Feb 28, 2013 at 7:23

Perception

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6 Comments

Anupam Over a year ago

While iterating I'm getting error stating - Type Mismatch. Cannot convert from Object to Stringat String title = titlesObj.get(i); Why is that?

Perception Over a year ago

@Anupam - method should have been getString, not get. I've fixed the code sample. Also, don't forget to accept whichever answer helped you the most!

Anupam Over a year ago

@Nezam Yes because I saw this answer first and it solved my problem. Anyways thankyou for your answer.

Nezam Over a year ago

Perception was just 22 secs fast with a mistake in his answer.Anyways.glad you got it solved

Perception Over a year ago

@Nezam, brow beating the OP this way is highly inappropriate. You made a large edit to your answer some time after it was posted which (significantly) altered it.

|

SubbaReddy PolamReddy · Accepted Answer · 2013-02-28 07:23:15Z

0

it will be help:

JSONArray  titles = new jSONObject(jsonstring).getJSONObject("searchdata").getJSONArray("titles");

JSONArray  desc  = new jSONObject(jsonstring).getJSONObject("searchdata").getJSONArray("desc");

JSONArray  links = new jSONObject(jsonstring).getJSONObject("searchdata").getJSONArray("links");

answered Feb 28, 2013 at 7:23

SubbaReddy PolamReddy

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