snippet.java

OutputStream os = null;
			InputStream is = null;
			HttpURLConnection conn = null;
			try {

				URL url = new URL(
						"http://aristeu.pt/aristGas/ws/cliente/index.php/");

				JSONObject jsonParam = new JSONObject();
				jsonParam.put("Nome", "");
				jsonParam.put("Email", "");
				jsonParam.put("Morada", "");
				jsonParam.put("CodigoPostal", "");
				jsonParam.put("Localidade", "");
				jsonParam.put("Contribuinte", "");
				jsonParam.put("Telemovel", "");
				jsonParam.put("Telefone", "");
				jsonParam.put("Password", "");
				jsonParam.put("CodigoAcesso", "");
				jsonParam.put("Ativo", 1);

				String message = jsonParam.toString();

				conn = (HttpURLConnection) url.openConnection();
				conn.setReadTimeout(10000 /* milliseconds */);
				conn.setConnectTimeout(15000 /* milliseconds */);
				conn.setRequestMethod("POST");
				conn.setDoInput(true);
				conn.setDoOutput(true);
				conn.setFixedLengthStreamingMode(message.getBytes().length);

				// add necessary HTTP headers
				conn.setRequestProperty("Content-Type",
						"application/json;charset=utf-8");
				conn.setRequestProperty("X-Requested-With", "XMLHttpRequest");

				// open your connection
				conn.connect();

				// setup send
				os = new BufferedOutputStream(conn.getOutputStream());
				os.write(message.getBytes());
				// clean up
				os.flush();

				// get your response via Inputstream
				is = conn.getInputStream();

			} catch (Exception e) {
				Log.v("Error Here", e.getMessage());
			}