java - 不能使方法无效

Question

当我尝试在类中创建 userLogin 方法时，如果 success == "true"，我想设置一个字符串值，但是当我创建方法 onResponse 和 onErrorListener void 时，它会给出错误:

'onErrorResponse('VolleyError') in Anonymous class derived from com.android.volley.Response.ErrorListener' clashes with 'onErrorResponse(VolleyError)' in 'com.android.volley.Response.ErrorListener'; attempting to use incompatible return type'

我的代码:

 private void userLogin() {
            RequestQueue requestQueue = MySingleton.getInstance().getrequestqueue();
            StringRequest stringRequest = new StringRequest(Request.Method.POST, LOGIN_URL,
                    new Response.Listener<String>() {
                        @Override
                        public void onResponse(String response) throws JSONException {
                            checkLogin(response);
                            if(success.equals("true")){
                                Login.testt = "signed in!";
                            }
                            else {
                                Login.testt = "error!";
                            }
                        }
                    },
                    new Response.ErrorListener() {
                        @Override
                        public void onErrorResponse(VolleyError error) {
                            Login.testt = "error!";
                        }
                    }) {
                @Override
                protected Map<String, String> getParams() throws AuthFailureError {
                    Map<String, String> map = new HashMap<String, String>();
                    map.put(EMAIL, email);
                    map.put(PASSWORD, password);
                    return map;
                }
            };
            requestQueue.add(stringRequest);
        }

如何将这些方法用作 void？

Answer 1

无法编辑覆盖方法。顾名思义，它们只能被覆盖