Tutorial: Simple HttpClient + JSON object exchange

zoniq · by **zoniq** » Sat Nov 07, 2009 4:38 pm

Just posted a new tutorial: http://devstream.stefanklumpp.com/2009/ ... nt-to.html
Source code is available on GitHub: http://github.com/StefanKlumpp/Simple-HTTP-Client

fireshaper · by **fireshaper** » Wed Dec 09, 2009 7:10 pm

zoniq: Could you tell me the easiest way to execute an http request and receive the JSON reply? Thanks!

zoniq · by **zoniq** » Wed Dec 09, 2009 7:19 pm

I thought I did so in my tutorial ;-)

Or what do you mean exactly?

fireshaper · by **fireshaper** » Wed Dec 09, 2009 7:25 pm

Currently I'm sending the request via

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responseHandler = new BasicResponseHandler();
System.out.println(httpclient.execute(httpget, responseHandler));
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And I want to see what the return JSON code is. I'm using Eclipse, FYI.

zoniq · by **zoniq** » Wed Dec 09, 2009 7:28 pm

In the tutorial I'm using:

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// Raw DEBUG output of our received JSON object:
 
 Log.i(TAG,"<jsonobject>\n"+jsonObjRecv.toString()+"\n</jsonobject>");
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This prints the elements of the received JSONObject into your Logcat output.

fireshaper · by **fireshaper** » Wed Dec 09, 2009 7:44 pm

Could I do something like this:

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ResponseHandler responseHandler = new BasicResponseHandler();
 
        jsonObjRecv = (JSONObject) httpclient.execute(httpget, responseHandler);
 
        Log.v(TAG, "<jsonobject>\n"+jsonObjRecv.toString()+"\n</jsonobject>");
Parsed in 0.034 seconds,  using GeSHi 1.0.8.4

padde · by **padde** » Thu Dec 10, 2009 8:51 am

The BasicResponseHandler returns the results as a string so something like this should work:

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    ResponseHandler responseHandler = new BasicResponseHandler();
 
    JSONObject jsonObjRecv = JSONObject(httpclient.execute(httpget, responseHandler));
 
    Log.v(TAG, "<jsonobject>\n"+jsonObjRecv.toString()+"\n</jsonobject>");
 
Parsed in 0.036 seconds,  using GeSHi 1.0.8.4

But you could write your own JSONObjectResponseHandler that returns a JSONObject.
I guess even the cast to JSONObject would be necessary then.

binnyb · by **binnyb** » Sun May 16, 2010 7:36 pm

After putting together a project including this code, I found that it only loads one object into the

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JSONObject jsonObjRecv = new JSONObject(resultString);
 
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JSONObject. It leaves out all the other data that is important to retrieve. I notice that in the

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String resultString= convertStreamToString(instream);
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String, all of the data is available. Why is all of the data left out after the first sequence of { } in my json file?

Edit: i just fixed this problem, stupid mistake.

Resolution: instead of returning a JSONObject, i return a JSONArray.

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String resultString = convertStreamToString(inputStream);
 
inputStream.close();
 
JSONArray jsonArrayReceived = new JSONArray(resultString);
 
return jsonArrayReceived;
 
Parsed in 0.037 seconds,  using GeSHi 1.0.8.4

erica · by **erica** » Thu Nov 25, 2010 10:15 am

Can someone please tell me if the url is to a PHP page, how do i read the value of 'key_1' and 'key_2' used in this tutorial? Sorry to ask this simple question but i have no idea how to get the values. Thanks in advance.

daj · by **daj** » Sat Apr 09, 2011 12:32 pm

@erica:

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<?php
$reqBodyJSON = @file_get_contents('php://input');
$reqObj = json_decode($reqBodyJSON);
$email =  $reqObj->{'email_key'};
$password = $reqObj->{'password_key'};
$id = $reqObj->{'id_key'};
?>
 
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daj · by **daj** » Sat Apr 09, 2011 12:35 pm

does anyone know how to send over SSL to a self-signed cert?

Tutorial: Simple HttpClient + JSON object exchange

Tutorial: Simple HttpClient + JSON object exchange

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