Sending a JSON HTTP POST request from Android

Question

I'm using the code below to send an http POST request which sends an object to a WCF service. This works ok, but what happens if my WCF service needs also other parameters? How can I send them from my Android client?

This is the code I've written so far:

StringBuilder sb = new StringBuilder();    String http = "http://android.schoolportal.gr/Service.svc/SaveValues";     HttpURLConnection urlConnection=null;   try {       URL url = new URL(http);       urlConnection = (HttpURLConnection) url.openConnection();     urlConnection.setDoOutput(true);        urlConnection.setRequestMethod("POST");       urlConnection.setUseCaches(false);       urlConnection.setConnectTimeout(10000);       urlConnection.setReadTimeout(10000);       urlConnection.setRequestProperty("Content-Type","application/json");         urlConnection.setRequestProperty("Host", "android.schoolportal.gr");     urlConnection.connect();        //Create JSONObject here     JSONObject jsonParam = new JSONObject();     jsonParam.put("ID", "25");     jsonParam.put("description", "Real");     jsonParam.put("enable", "true");     OutputStreamWriter out = new   OutputStreamWriter(urlConnection.getOutputStream());     out.write(jsonParam.toString());     out.close();        int HttpResult =urlConnection.getResponseCode();       if(HttpResult ==HttpURLConnection.HTTP_OK){           BufferedReader br = new BufferedReader(new InputStreamReader(               urlConnection.getInputStream(),"utf-8"));           String line = null;           while ((line = br.readLine()) != null) {               sb.append(line + "\n");           }           br.close();            System.out.println(""+sb.toString());        }else{               System.out.println(urlConnection.getResponseMessage());       }   } catch (MalformedURLException e) {             e.printStackTrace();   }   catch (IOException e) {        e.printStackTrace();       } catch (JSONException e) {     // TODO Auto-generated catch block     e.printStackTrace(); }finally{       if(urlConnection!=null)       urlConnection.disconnect();   }   

Answer 1

Posting parameters Using POST:-

URL url; URLConnection urlConn; DataOutputStream printout; DataInputStream  input; url = new URL (getCodeBase().toString() + "env.tcgi"); urlConn = url.openConnection(); urlConn.setDoInput (true); urlConn.setDoOutput (true); urlConn.setUseCaches (false); urlConn.setRequestProperty("Content-Type","application/json");    urlConn.setRequestProperty("Host", "android.schoolportal.gr"); urlConn.connect();   //Create JSONObject here JSONObject jsonParam = new JSONObject(); jsonParam.put("ID", "25"); jsonParam.put("description", "Real"); jsonParam.put("enable", "true"); 

The part which you missed is in the the following... i.e., as follows..

// Send POST output. printout = new DataOutputStream(urlConn.getOutputStream ()); printout.writeBytes(URLEncoder.encode(jsonParam.toString(),"UTF-8")); printout.flush (); printout.close (); 

The rest of the thing you can do it.

Answer 2

try some thing like blow:

SString otherParametersUrServiceNeed =  "Company=acompany&Lng=test&MainPeriod=test&UserID=123&CourseDate=8:10:10"; String request = "http://android.schoolportal.gr/Service.svc/SaveValues";  URL url = new URL(request);  HttpURLConnection connection = (HttpURLConnection) url.openConnection();    connection.setDoOutput(true); connection.setDoInput(true); connection.setInstanceFollowRedirects(false);  connection.setRequestMethod("POST");  connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");  connection.setRequestProperty("charset", "utf-8"); connection.setRequestProperty("Content-Length", "" + Integer.toString(otherParametersUrServiceNeed.getBytes().length)); connection.setUseCaches (false);  DataOutputStream wr = new DataOutputStream(connection.getOutputStream ()); wr.writeBytes(otherParametersUrServiceNeed);     JSONObject jsonParam = new JSONObject(); jsonParam.put("ID", "25"); jsonParam.put("description", "Real"); jsonParam.put("enable", "true");  wr.writeBytes(jsonParam.toString());  wr.flush(); wr.close(); 

References :

1. http://www.xyzws.com/Javafaq/how-to-use-httpurlconnection-post-data-to-web-server/139
2. Java - sending HTTP parameters via POST method easily