Android（Kotlin） - CookieHandler不适用于POST方法但使用GET工作

Question

我的应用程序中有两个POST方法。一个是LoginActivity，我在其中放置了CookieHandler（代码：CookieHandler.setDefault(CookieManager())）。在这个活动之后，我得到了一些GET方法并且cookie正在运行，但是当我想使用另一个POST方法时，我得到了AuthFailurEerror。这是我的代码：

LoginActivity：

// this line is in onCreate method
CookieHandler.setDefault(CookieManager())

private fun login2() {

        val req = object : StringRequest(Request.Method.POST,
                LOGIN_API_URL,
                Response.Listener { response ->
                    Toast.makeText(this, response, Toast.LENGTH_LONG).show()
                    val user = Intent(this, UserActivity::class.java)
                    startActivity(user)

                }, Response.ErrorListener { e ->

            Toast.makeText(this, e.toString(), Toast.LENGTH_LONG).show()
        }) {
            public override fun getParams(): Map<String, String> {
                val params = HashMap<String, String>()
                params.put("username", username.text.toString())
                params.put("password", passwd.text.toString())
                return params
            }

            override fun getBodyContentType(): String {
                return "application/x-www-form-urlencoded";
            }
        }
        req.retryPolicy = DefaultRetryPolicy(60000, DefaultRetryPolicy.DEFAULT_MAX_RETRIES, DefaultRetryPolicy.DEFAULT_BACKOFF_MULT)

        volleyRequest!!.add(req)

    }

SecondActivity

private fun aktualizacja2() {

            val req = object : StringRequest(Request.Method.POST,
                    UPDATE_URL,
                    Response.Listener { response ->
                        Toast.makeText(this, response.toString(), Toast.LENGTH_LONG).show()


                    }, Response.ErrorListener { e ->

                Toast.makeText(this, e.toString(), Toast.LENGTH_LONG).show()
            }) {
                public override fun getParams(): Map<String, String> {
                    val params = HashMap<String, String>()
                    params.put("librus_user", usernameEdit.text.toString())
                    params.put("librus_pswd", passwordEdit.text.toString())
                    return params
                }

                override fun getBodyContentType(): String {
                    return "application/x-www-form-urlencoded";
                }

            }
        }

非常感谢您的帮助！