Using HttpClient and HttpPost in Android with post parameters

Question

I m writing code for an Android application that is supposed to take data  package it as Json and post it to a web server  that in turn is supposed to respond with json   Using a GET request works fine  but for some reason using POST all data seems to get stripped and the server does not receive anything   Here s a snippet of the code   HttpParams params   new BasicHttpParams    HttpConnectionParams setConnectionTimeout params  5000   HttpConnectionParams setSoTimeout params  5000           DefaultHttpClient httpClient   new DefaultHttpClient params   BasicCookieStore cookieStore   new BasicCookieStore    httpClient setCookieStore cookieStore    String uri   JSON ADDRESS  String result       String username    user   String apikey    something   String contentType    application json    JSONObject jsonObj   new JSONObject     try       jsonObj put  username   username       jsonObj put  apikey   apikey     catch  JSONException e        Log e TAG   JSONException      e      HttpPost httpPost   new HttpPost uri   List lt NameValuePair gt  postParams   new ArrayList lt NameValuePair gt     postParams add new BasicNameValuePair  json   jsonObj toString      HttpGet httpGet   null  try       UrlEncodedFormEntity entity   new UrlEncodedFormEntity postParams       entity setContentEncoding HTTP UTF 8       entity setContentType  application json        httpPost setEntity entity        httpPost setHeader  Content-Type   contentType       httpPost setHeader  Accept   contentType     catch  UnsupportedEncodingException e        Log e TAG   UnsupportedEncodingException      e      try       HttpResponse httpResponse   httpClient execute httpPost       HttpEntity httpEntity   httpResponse getEntity         if  httpEntity    null            InputStream is   httpEntity getContent            result   StringUtils convertStreamToString is           Log i TAG   Result      result           catch  ClientProtocolException e        Log e TAG   ClientProtocolException      e     catch  IOException e        Log e TAG   IOException      e      return result    I think I have followed the general guidelines on how to create the parameters and post them  but apparently not   Any help or pointers to where I can find a solution  are very welcome at this point  after spending a few hours realizing no post data was ever sent   The real server is running Wicket on Tomcat  but I ve also tested it out on a simple PHP page  with no difference

User · Accepted Answer

have you tried doing it without the JSON object and just passed two basicnamevaluepairs? also, it might have something to do with your serversettings

Update: this is a piece of code I use:

InputStream is = null;
ArrayList<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();
    nameValuePairs.add(new BasicNameValuePair("lastupdate", lastupdate)); 

try {
        HttpClient httpclient = new DefaultHttpClient();
        HttpPost httppost = new HttpPost(connection);
        httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
        HttpResponse response = httpclient.execute(httppost);
        HttpEntity entity = response.getEntity();
        is = entity.getContent();
        Log.d("HTTP", "HTTP: OK");
    } catch (Exception e) {
        Log.e("HTTP", "Error in http connection " + e.toString());
    }

User · Answer

You can actually send it as JSON the following way      Build the JSON object to pass parameters JSONObject jsonObj   new JSONObject    jsonObj put  username   username   jsonObj put  apikey   apikey      Create the POST object and add the parameters HttpPost httpPost   new HttpPost url   StringEntity entity   new StringEntity jsonObj toString    HTTP UTF 8   entity setContentType  application json    httpPost setEntity entity   HttpClient client   new DefaultHttpClient    HttpResponse response   client execute httpPost

User · Answer

public class GetUsers  extends AsyncTask         Override     protected void onPreExecute             super onPreExecute                private String convertStreamToString InputStream is            BufferedReader reader   new BufferedReader new InputStreamReader is            StringBuilder sb   new StringBuilder             String line   null          try               while   line   reader readLine       null                    sb append line     n                            catch  IOException e                e printStackTrace              finally               try                   is close                  catch  IOException e                    e printStackTrace                                     return sb toString               public String connect                 HttpClient httpclient   new DefaultHttpClient                Prepare a request object         HttpPost htopost   new HttpPost  URL            htopost setHeader new BasicHeader  Authorization   Basic Og                try                JSONObject param   new JSONObject                param put  PageSize  100               param put  Userid  userId               param put  CurrentPage  1                htopost setEntity new StringEntity param toString                      Execute the request             HttpResponse response               response   httpclient execute htopost                  Examine the response status                Get hold of the response entity             HttpEntity entity   response getEntity                 if  entity    null                        A Simple JSON Response Read                 InputStream instream   entity getContent                    String result   convertStreamToString instream                       A Simple JSONObject Creation                 json   new JSONArray result                       Closing the input stream will trigger connection release                 instream close                    return    response getStatusLine   getStatusCode                            catch  Exception e                e printStackTrace                       return null              Override     protected String doInBackground String    urls            return connect                Override     protected void onPostExecute String status           try                if status equals  200                                       Global defaultMoemntLsit clear                         for  int i   0  i  lt  json length    i                              JSONObject ojb   json getJSONObject i                           UserMomentModel u   new UserMomentModel                            u setId ojb getString  Name                             u setUserId ojb getString  ID                               Global defaultMoemntLsit add u                                                         userAdapter   new UserAdapter getActivity    Global defaultMoemntLsit                               recycleView setAdapter userMomentAdapter                               recycleView setLayoutManager mLayoutManager                                     catch  Exception e                        e printStackTrace

User · Answer

I ve just checked and i have the same code as you and it works perferctly  The only difference is how i fill my List for the params    I use a   ArrayList lt BasicNameValuePair gt  params  and fill it this way     params add new BasicNameValuePair  apikey   apikey     I do not use any JSONObject to send params to the webservices   Are you obliged to use the JSONObject

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