Android Volley PUT request

Question

i'm new to Volley and Android in general. Below is code snippet (Android using Volley) which i'm trying to execute, however it's the server returns a 400. Using another REST Client works perfectly. It's a request to the server using PUT method.

 @Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_login);
    sendRequest();
}

private void sendRequest() {
    RequestQueue queue = Volley.newRequestQueue(this);

    final JSONObject jsonObject = new JSONObject();
    try {
        jsonObject.put("password", "ttttt");
        jsonObject.put("username", "tester3");
        jsonObject.put("token", "blah");
    } catch (JSONException e) {
        // handle exception
    }


    JsonObjectRequest putRequest = new JsonObjectRequest(Request.Method.PUT, url, jsonObject,
            new Response.Listener<JSONObject>()
            {
                @Override
                public void onResponse(JSONObject response) {
                    // response
                    Log.d("Response", response.toString());
                }
            },
            new Response.ErrorListener()
            {
                @Override
                public void onErrorResponse(VolleyError error) {
                    // error
                    Log.d("Error.Response", error.toString());
                }
            }
    ) {

        @Override
        public Map<String, String> getHeaders()
        {
            Map<String, String> headers = new HashMap<String, String>();
            headers.put("Content-Type", "application/json");
            headers.put("Accept", "application/json");
            return headers;
        }

        @Override
        public byte[] getBody() {

            try {
                Log.i("json", jsonObject.toString());
                return jsonObject.toString().getBytes("UTF-8");
            } catch (UnsupportedEncodingException e) {
                e.printStackTrace();
            }
            return null;
        }
    };

    queue.add(putRequest);
}

When i execute this code i always get a 400 Bad request back and i can't figure out why. Using another client like Postman, it works as expected. Here is the postman request:

Raw Request:
{ "token": "blah", "password": "ttttt", "username": "tester3" }

Headers: Content-Type: application/json

I can't see anything wrong with the request i'm hoping someone can point out what i'm doing wrong?

Answer 1

Sometimes , adding header "Content-Type", "application/json" in getHeaders() will not work its better to also override getBodyContentType() and return the header here.

So along with ,

public Map<String, String> getHeaders()
    {
        Map<String, String> headers = new HashMap<String, String>();
        headers.put("Content-Type", "application/json"); 
        return headers;
    }

also add,

    @Override
    public String getBodyContentType() {
        return "application/json";
    }

This worked for me while using POST.