Android Volley - BasicNetwork performRequest Unexpected response code 400

Question

Problem statement   I am trying to access an REST API that will return a JSON object for various HTTP status codes  400  403  200 etc  using Volley   For any HTTP status other than 200  it seems the  Unexpected response code 400  is a problem  Does anyone have a way to bypass this  error    Code   protected void getLogin            final String mURL    https   somesite com api login        EditText username    EditText  findViewById R id username       EditText password    EditText  findViewById R id password           Post params to be sent to the server     HashMap lt String  String gt  params   new HashMap lt String  String gt         params put  username   username getText   toString         params put  password   password getText   toString          JsonObjectRequest req   new JsonObjectRequest mURL  new JSONObject              params   new Response Listener lt JSONObject gt               Override         public void onResponse JSONObject response                 try                   JSONObject obj   response                          getJSONObject  some json obj                     Log w  myApp                            status code       obj getString  name                         VolleyLog v  Response  n  s   response toString 4                   catch  JSONException e                    e printStackTrace                                   new Response ErrorListener              Override         public void onErrorResponse VolleyError error                Log w  error in response    Error      error getMessage                               add the request object to the queue to be executed     AppController getInstance   addToRequestQueue req

User · Answer

You mean that want to get status codes   VolleyError has a member variable type of NetworkResponse and it is public   You can access error networkResponse statusCode for http error code   I hope it is helpful for you

User · Answer

in my case  I was not writing reg url with  8080   String reg url    http   192 168 29 163 8080 register php

User · Answer

What I did was append an extra     to my url  e g    String url    http   www google com     to   String url    http   www google com

User · Answer

Me too got the same error but in my case I was calling url with blank spaces   Then  I fixed it by parsing like below   String url    Your URL Link    url   url replaceAll        20     StringRequest stringRequest   new StringRequest Request Method GET  url                              new com android volley Response Listener lt String gt                                       Override                                 public void onResponse String response

User · Answer

Override public Map lt String  String gt  getHeaders   throws AuthFailureError       HashMap lt String  String gt  headers   new HashMap lt String  String gt         headers put  Content-Type    application json  charset utf-8        return headers      You need to add Content-Type to the header

User · Answer

Try this       StringRequest sr   new StringRequest type url  new Response Listener lt String gt               Override         public void onResponse String response                    valid response                  new Response ErrorListener              Override         public void onErrorResponse VolleyError error                   error                     Override     protected Map lt String String gt  getParams            Map lt String String gt  params   new HashMap lt String  String gt                 params put  username   username               params put  password   password               params put  grant type    password            return params              Override     public Map lt String  String gt  getHeaders   throws AuthFailureError           Map lt String String gt  params   new HashMap lt String  String gt                Removed this line if you dont need it or Use application json            params put  Content-Type    application x-www-form-urlencoded            return params

User · Answer

Just to update all  after some deliberations  I have decided to use Async Http Client instead to solve my earlier problem  The library allows a cleaner approach  to me  to manipulate HTTP responses especially in cases where JSON objects are returned in all scenarios HTTP statuses   protected void getLogin          EditText username    EditText  findViewById R id username        EditText password    EditText  findViewById R id password         RequestParams params   new RequestParams        params put  username   username getText   toString         params put  password   password getText   toString          RestClient post getHost      api v1 auth login   params              new JsonHttpResponseHandler               Override         public void onSuccess int statusCode  Header   headers                  JSONObject response                 try                      process JSONObject obj                  Log w  myapp   success status code       statusCode                  catch  JSONException e                       TODO Auto-generated catch block                 e printStackTrace                                      Override         public void onFailure int statusCode  Header   headers                  Throwable throwable  JSONObject errorResponse                Log w  myapp    failure status code       statusCode                 try                     process JSONObject obj                 Log w  myapp    error         errorResponse getString  message   toString                   catch  JSONException e                       TODO Auto-generated catch block                 e printStackTrace

User · Answer

change     public static final String URL    http   api-Location     to      public static final String URL    https   api-Location    it s happen because i m using 000webhostapp app

User · Answer

One way of doing this without changing Volley s source code is to check for the response data in the VolleyError and parse it your self  As of f605da3 commit  Volley throws a ServerError exception that contains the raw network response  So you can do something similar to this in your error listener     import com android volley toolbox HttpHeaderParser     public void onErrorResponse VolleyError error            As of f605da3 the following should work     NetworkResponse response   error networkResponse      if  error instanceof ServerError  amp  amp  response    null            try               String res   new String response data                         HttpHeaderParser parseCharset response headers   quot utf-8 quot                    Now you can use any deserializer to make sense of data             JSONObject obj   new JSONObject res             catch  UnsupportedEncodingException e1                   Couldn t properly decode data to string             e1 printStackTrace              catch  JSONException e2                   returned data is not JSONObject              e2 printStackTrace                       For future  if Volley changes  one can follow the above approach where you need to check the VolleyError for raw data that has been sent by the server and parse it  I hope that they implement that TODO mentioned in the source file

[android] Android Volley - BasicNetwork.performRequest: Unexpected response code 400

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