Blog : Exception on httpclient.execute to web server

Exception on httpclient.execute to web server

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I try to send JSON data on web server and get response by this method.
public JSONObject postOnServer(JSONObject json) {

  HttpResponse response;
  JSONObject res = null;

  HttpClient httpclient = new DefaultHttpClient();
  HttpConnectionParams.setConnectionTimeout(httpclient.getParams(), 10000);
  HttpPost httpPost = new HttpPost(PATH);

  try {

  //StringEntity stringEntity = new StringEntity("json", String.valueOf(json));
  ByteArrayEntity postMessage = new ByteArrayEntity(json.toString().getBytes("UTF8"));
  httpPost.setEntity(postMessage);
  response = httpclient.execute(httpPost);

  if (response.getStatusLine().getStatusCode() == 200) {

  InputStream instream = response.getEntity().getContent();
  try {
  res = new JSONObject(convertStreamToString(instream));
  } catch (JSONException e) {
  // TODO Auto-generated catch block
  Log.i("Response JSON", e.toString());
  }

  } else {

  res = new JSONObject();
  try {
  res.put("error", "Unable to load page.");
  } catch (JSONException e) {
  // TODO Auto-generated catch block
  }

  }
  } catch (IOException ex) {

  Log.i("Connection.postOnServer", "1.try exception: "+ex);
  res = new JSONObject();
  try {
  res.put("error", "Synchronization is not enable: Connection has aborted.");
  } catch (JSONException e) {
  Log.i("Connection.postOnServer", "put exception: "+e);
  }

  }

  return res;
}
But always it end on line response = httpclient.execute(httpPost); with this exception
05-24 10:58:51.635: E/AndroidRuntime(4709): FATAL EXCEPTION: main
05-24 10:58:51.635: E/AndroidRuntime(4709): android.os.NetworkOnMainThreadException
05-24 10:58:51.635: E/AndroidRuntime(4709):  at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1099)
05-24 10:58:51.635: E/AndroidRuntime(4709):  at libcore.io.BlockGuardOs.connect(BlockGuardOs.java:84)
05-24 10:58:51.635: E/AndroidRuntime(4709):  at libcore.io.IoBridge.connectErrno(IoBridge.java:138)
05-24 10:58:51.635: E/AndroidRuntime(4709):  at libcore.io.IoBridge.connect(IoBridge.java:112)
05-24 10:58:51.635: E/AndroidRuntime(4709):  at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:192)
05-24 10:58:51.635: E/AndroidRuntime(4709):  at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:459)
05-24 10:58:51.635: E/AndroidRuntime(4709):  at java.net.Socket.connect(Socket.java:842)
05-24 10:58:51.635: E/AndroidRuntime(4709):  at org.apache.http.conn.scheme.PlainSocketFactory.connectSocket(PlainSocketFactory.java:119)
05-24 10:58:51.635: E/AndroidRuntime(4709):  at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:144)
05-24 10:58:51.635: E/AndroidRuntime(4709):  at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164)
05-24 10:58:51.635: E/AndroidRuntime(4709):  at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119)
05-24 10:58:51.635: E/AndroidRuntime(4709):  at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:360)
05-24 10:58:51.635: E/AndroidRuntime(4709):  at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555)
05-24 10:58:51.635: E/AndroidRuntime(4709):  at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
05-24 10:58:51.635: E/AndroidRuntime(4709):  at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465)
Have someone idea, how to fix it? On thirst try if i use catch(IOException), aplication is destroyd. If I use catch(Exception) aplication go on with no action. What should I do to send data?
   

   

   Android doesn't let you run network requests on the user interface thread. This is to stop the requests from jamming up the interface while they execute. You need to execute the request in a separate thread. Here's an example:
new Thread(new Runnable() {
  //Thread to stop network calls on the UI thread
  public void run() {
  //Request the HTML
  try {
  HttpParams httpParameters = new BasicHttpParams();
  HttpConnectionParams.setConnectionTimeout(httpParameters, TIMEOUT_CONNECTION);
  HttpConnectionParams.setSoTimeout(httpParameters, TIMEOUT_SOCKET);

  HttpClient client = new DefaultHttpClient(httpParameters);
  HttpGet request = new HttpGet(getString(R.string.url));
  HttpResponse response = client.execute(request);

  //Do something with the response
  }
  catch (IOException e) {
  Log.e("Tag", "Could not get HTML: " + e.getMessage());
  }
  }
}).start();