private class ImageUploadRequest extends JsonObjectRequest {
        public ImageUploadRequest(int method, String url, Response.Listener<JSONObject> listener, Response.ErrorListener errorListener) {
            super(method, url, listener, errorListener);
        }

        @Override
        public Map<String, String> getParams() throws AuthFailureError {
            Map<String, String> params = new HashMap<>();
            params.put("cover[base64]", imageThumbnailBase64Str);
            params.put("cover[name]", null);
            params.put("ref_g", "Wap");
            params.put("ref_m", "Platform");
            params.put("ref_a", "register");
            params.put("access_token", Constants.ACCESS_TOKEN_UPLOAD_IMAGE);

            Log.v(TAG, params.toString());

            return params;
        }

        @Override
        public Map<String, String> getHeaders() throws AuthFailureError {
            Map<String,String> headers = new HashMap<String, String>();
            headers.put("Content-Type","application/x-www-form-urlencoded");
            headers.put("abc", "value");
            return headers;
        }

    }

        ImageUploadRequest request = new ImageUploadRequest(
                1,
                String.format("%s/index.php?g=Wap&m=Upload&a=server&token=%s&is_ngdata=1",
                        Constants.SERVER_URL, Constants.TOKEN),
                new Response.Listener<JSONObject>() {

                    @Override
                    public void onResponse(JSONObject response) {
                        // status: 0 失败，status: 1 成功
                        // error 错误消息
                        Log.v(TAG, response.toString());
                    }
                },
                new Response.ErrorListener() {

                    @Override
                    public void onErrorResponse(VolleyError volleyError) {

                    }
                });

        WeiPingTaiApplication.getInstance().getRequestQueue().add(request);