android - Volley Server Error with null Network response -


every time try use post method volley, sever error. null value in getcause, , default value in getnetworkresponse.tostring().

if use method, works fine (i response url).

can can do?

    map<string, string> jsonparams = new hashmap<string, string>();     jsonparams.put("teststr", "abd");      requestqueue requestqueue = volleysingleton.getinstance().getrequestqueue();     jsonobjectrequest request = new jsonobjectrequest(             request.method.post,             url,             new jsonobject(jsonparams),             new response.listener<jsonobject>() {                 @override                 public void onresponse(jsonobject response) {                      try {                         toast.maketext(getapplicationcontext(), "success"+response.tostring(), toast.length_long).show();                     }catch(exception e){                         toast.maketext(getapplicationcontext(), "json error", toast.length_long).show();                     }                 }             },             new response.errorlistener() {                 @override                 public void onerrorresponse(volleyerror error) {                     log.d("abd", "error: " + error                                     + ">>" + error.networkresponse.statuscode                                     + ">>" + error.networkresponse.data                                     + ">>" + error.getcause()                                     + ">>" + error.getmessage());                 }             }) {                  @override                 protected map<string,string> getparams() {                     hashmap<string, string> params = new hashmap<string, string>();                     params.put("key", "value");                     return params;                 }                  @override                 public map<string, string> getheaders() throws authfailureerror {                     hashmap<string, string> headers = new hashmap<string, string>();                     headers.put("content-type", "application/json; charset=utf-8");                     return headers;                 }     };     requestqueue.add(request);

error log:

error: error: com.android.volley.servererror>>404>>[b@42b1e0d0>>null>>null

update: networkresponse.statuscode comes 404, though url accessible (and return data if use method). if remove header part in post method, still same.

the url:

<?php     $response = array();      $jsonstring = file_get_contents('php://input');     $jsonobj = json_decode($jsonstring, true);      if(!isset($jsonobj['teststr'])){         $response["msg"] = "no data.";     }else{         $response["msg"] = "success: ".$jsonobj['teststr'];     }     echo json_encode($response); ?>

first, try make sure server works well. can use postman(chrome plug-in) or other way send post request url , see responses.

after make sure there's no problem server, let solve problem volley.

there's problem jsonobjectrequest when use post method. volley jsonobjectrequest post request not working.

i suggest use stringrequest first , overwrite getparams method did before. after survive task, can try write own request, not difficult useful.

i suggest add request.setshouldcache(false) before requestqueue.add(request);. default, volley saves response in cache , behavior may cause strange problem.


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