Android Volley gives me 400 error

2023-07-29 19:58:28

本文来自：http://*.com/questions/21739276/android-volley-gives-me-400-error

本人是根据文中的其中一方法：

I had the same problem and i removed from the header:

  headers.put("Content-Type", "application/json");

now it works great!

以下是全文

I'm trying to make a POST request to my API and it works in Postman (I get a valid JSON object), but not using Volley. With the following code:

String URL = "http://somename/token";

RequestQueue queue = Volley.newRequestQueue(StartActivity.this);

queue.add(new JsonObjectRequest(Method.POST, URL, null,

   new Listener<JSONObject>() {

       @Override

       public void onResponse(JSONObject response) {

           // handle response

           Log.i("StartActivity", response.toString());

       }

   }, new ErrorListener() {

       @Override

       public void onErrorResponse(VolleyError error) {

           // handle error

           Log.i("StartActivity", error.toString());

       }

   }) {

   @Override

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

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

       headers.put("username", "someUsername");

       headers.put("password", "somePassword");

       headers.put("Authorization", "Basic someCodeHere");

       return headers;

   }

   @Override

    protected Map<String,String> getParams(){

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

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

            return params;

        }

   });

I get the following error:

02-12 21:42:54.774: E/Volley(19215): [46574] BasicNetwork.performRequest: Unexpected response code 400 for http://somename/token/

I have seen a lot of examples and I don't really see what is going wrong here. Anyone any idea?

I updated the code with this method:

HashMap<String, String> createBasicAuthHeader(String username, String password) {

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

        String credentials = username + ":" + password;

        String base64EncodedCredentials =

                Base64.encodeToString(credentials.getBytes(), Base64.NO_WRAP);

        headerMap.put("Authorization", "Basic " + base64EncodedCredentials);

        return headerMap;

    }

and changed getHeaders() to:

@Override

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

       return createBasicAuthHeader("username", "password");

   }

Still getting the same error!

asked Feb 12 '14 at 20:50
Android Volley gives me 400 error
Loolooii
2,577104171
 
    
are you sure you're putting in the auth headers correctly? if you're using basic auth you should be base64 encoding the username:password I believe – panini Feb 12 '14 at 20:54
    
@panini I'm already setting the base64 code as "somecodehere". – Loolooii Feb 12 '14 at 21:16
    
@Loolooii I have the same problem, did you find a solution ? – Robby Smet May 19 '14 at 11:36
    
@just8laze I'm just using Android's AsyncTask. It's much simpler and it works perfect. See this thread: *.com/questions/9671546/asynctask-android-exampl‌​e – Loolooii May 19 '14 at 11:53
    
@Loolooii Yeah, I already have it working with AsyncTask and HttpPost. No idea why it doesn't work with Volley. Thanks for the response. – Robby Smet May 19 '14 at 11:56

9 Answers

I had the same problem and i removed from the header:

  headers.put("Content-Type", "application/json");

now it works great!

answered Nov 7 '15 at 15:02
 
user3136364
 
 
    
ahmagad this worked. – Bolling Oct 6 at 14:05
Android Volley gives me 400 errorAndroid Volley gives me 400 error

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

answered Feb 12 '14 at 20:58
Android Volley gives me 400 error
 
1  
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

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

  1. go to src/com/android/volley/toolbox/BasicNetwork.java
  2. Change the following lines
 if (statusCode < 200 || statusCode > 299) {

     throw new IOException();

 }

with

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

     throw new IOException();

 }

Hope this helps.

answered Apr 17 '15 at 8:47
Android Volley gives me 400 error
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
Android Volley gives me 400 error
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
Android Volley gives me 400 error
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.

answered Dec 17 '15 at 16:33
Android Volley gives me 400 error
Raul Pinto
822512
 

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

  1. GetHeader function should be as

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

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

        return param;
    
    }

  2. Add this new override function.

        @Override
    
    public String getBodyContentType() {
    
        return "application/json";
    
    }
answered Mar 17 at 21:28
Android Volley gives me 400 error
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
Android Volley gives me 400 error
Rohit
115
 
1  
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

Check if you are using correct SDK

For Android Studio / IntelliJIDEA:

File -> Project Structure -> Project -> Project SDK

Modules -> Check each modules "Module SDK"

Preferably, you should use "Google API (x.x)" instead of An
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