Android Volley gives me 400 error

answered Nov 7 '15 at 15:02

user3136364

ahmagad this worked. – Bolling Oct 6 at 14:05

up vote3down vote

400 indicates a bad request, maybe you're missing Content-Type=application/json on your headers

answered Feb 12 '14 at 20:58

Leonardo Pinto

18025

it's something else, JsonRequest has that by default – thepoosh Feb 12 '14 at 21:03

I think @thepoosh is right, anyway I tried it and still getting the same error. – Loolooii Feb 12 '14 at 21:16

it's a server error, check the API – thepoosh Feb 12 '14 at 21:17

@thepoosh its not a server error, its a bad request which means if anything its a client error – panini Feb 12 '14 at 21:20

I meant to say, server initiated error, meaning the API was misused – thepoosh Feb 12 '14 at 21:23

show 7 more comments

up vote1down vote

I've got this error and now Iit's been fixed. I did what is told in this link. What you need to do is

go to src/com/android/volley/toolbox/BasicNetwork.java
Change the following lines

 if (statusCode < 200 || statusCode > 299) {

     throw new IOException();

 }

with

 if (statusCode < 200 || statusCode > 405) {

     throw new IOException();

 }

Hope this helps.

edited Sep 3 '15 at 8:16

Amir

2,04711323

answered Apr 17 '15 at 8:47

stackex

1,5751312

I have removed this params.put("Content-Type", "application/x-www-form-urlencoded");

This is my Code Change.

@Override

        protected Map<String,String> getParams(){

            Map<String,String> params = new HashMap<String, String>();

            if(!isLogout) {

                params.put("username", username);

                params.put("password", password);

                params.put("grant_type", "password");

            } else {

            }

            return params;

        }

        @Override

        public Map<String, String> getHeaders() throws AuthFailureError {

            Map<String,String> params = new HashMap<String, String>();

            if(isLogout) {

                params.put("Authorization", "bearer "+LibraryDataModel.getToken());

            }else {

            // Removed this line

            // params.put("Content-Type", "application/x-www-form-urlencoded");

            }

            return params;

        }

answered Nov 18 '14 at 16:32

dhiku

1,0561328

I have the same issue before and I got the solution in my project:

RequestQueue requestManager = Volley.newRequestQueue(this);

        String requestURL = "http://www.mywebsite.org";

        Listener<String> jsonListerner = new Response.Listener<String>() {

            @Override

            public void onResponse(String list) {

            }

        };

        ErrorListener errorListener = new Response.ErrorListener() {

            @Override

            public void onErrorResponse(VolleyError error) {

                Log.w("Volley Error", error.getMessage());

            }

        };

        StringRequest fileRequest = new StringRequest(Request.Method.POST, requestURL, jsonListerner,errorListener){

            @Override

            protected Map<String, String> getParams() throws AuthFailureError {

                Map<String,String> params = new HashMap<String, String>();

                params.put("token", account.getToken());

                return params;

            }

            @Override

            public Map<String, String> getHeaders() throws AuthFailureError {

                HashMap<String, String> headers = new HashMap<String, String>();

                // do not add anything here

                return headers;

            }

        };

        requestManager.add(fileRequest);

In the code Snippet above I used Post Method:

My answer is base on my experience and so take note:

1.) When using POST method use "StringRequest" instead of "JsonObjectRequest"

2.) inside getHeaders Override the value with an Empty HashMap

 example snippet:

        @Override

        protected Map<String, String> getParams() throws AuthFailureError {

            Map<String,String> params = new HashMap<String, String>();

            params.put("token", account.getToken());

            return params;

        }

        @Override

        public Map<String, String> getHeaders() throws AuthFailureError {

            HashMap<String, String> headers = new HashMap<String, String>();

            // do not add anything here

            return headers;

        }

And everything works in my case.

answered Jan 6 '15 at 9:31

neferpitou

6691917

In Android 2.3 there is a problem using Base64.encodeToString() as it introduces a new line in HTTP header. See my response to this question here in SO.

Short answer: Don't use Base64.encodeToString() but put the already encoded String there.

edited Dec 17 '15 at 16:39

answered Dec 17 '15 at 16:33

Raul Pinto

822512

400 error is because Content-Type is set wrong. Please do the following.

GetHeader function should be as

    @Override

    public Map<String, String> getHeaders() throws AuthFailureError {

        Map<String, String> param = new HashMap<String, String>();

        return param;

    }

Add this new override function.

    @Override

    public String getBodyContentType() {

        return "application/json";

    }

answered Mar 17 at 21:28

Kashi

361

There can be multiple reasons for this error. One ofcouse as said by others is, maybe you are missing or have improperly set 'Content-type' header. If you are properly implemented that, other possible reason is that you are sending params directly from your url. There may be a case when params is a string with some white spaces in it. These white spaces cause problem in GET requests through volley. You need to find another way around it. Thats all.

answered Apr 11 at 11:49

Rohit

115

This does not provide an answer to the question. Once you have sufficient reputation you will be able to comment on any post; instead, provide answers that don't require clarification from the asker. - From Review– silwar Apr 11 at 12:43

This answer worked for me. That is why I posted it here. – Rohit Apr 11 at 15:46