I would to send to a localhost server, json data from mobile device in an Android application. I use a real mobile phone as client for testing my app. I'm using API Rest for sending my data, and Servlet for receiving it.
I have a connection error.My mobile phone doesn't connect to server and I don't know why...
This is the client code:
public void send(){
StringBuilder sb = new StringBuilder();
String http = "http://10.0.2.2/W7TurismoServer/Servlet";
ArrayList<String> mostraArray=show();
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","http://10.0.2.2/W7TurismoServer/Servlet");
urlConnection.connect();
//Create JSONObject here*/
JSONObject jsonParam = new JSONObject();
JSONArray arraypref=new JSONArray();
arraypref.put(mostraArray);
jsonParam.put("stringList",arraypref);
System.out.println(jsonParam);
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();
}
}
show() method return ArrayList and I would send this array to server.
this is the server code:
* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
PrintWriter out= response.getWriter();
out.println("sono11");
System.out.println("stouk do");
StringBuffer jb = new StringBuffer();
String line = null;
try {
BufferedReader reader = request.getReader();
while ((line = reader.readLine()) != null)
jb.append(line);
} catch (Exception e) { /*report an error*/ }
try {
JSONObject jsonObject = JSONObject.fromObject(jb.toString());
System.out.println("sono venuto,"+jsonObject);
} catch (ParseException e) {
// crash and burn
throw new IOException("Error parsing JSON request string");
}
}
}
This class is in W7TurismoServer. Thank's in advance for helping.
