排球图书馆 - 由于请求缓慢导致应用程序崩溃

Question

由于请求缓慢，我的应用程序崩溃了。 我请求一个名为“结果”的json登录。

myRequest.AuthenticationRequest(username,password,getApplicationContext());

    final Handler handlerC = new Handler();
    handlerC.postDelayed(new Runnable() {
        @Override
        public void run() {

            String result = myRequest.getResult();
            if(result.equals("success"))
            {
                userInfoHolder.setSESSION(username);
                userInfoHolder.RequestUserInfo(getApplicationContext());
                userInfoHolder.RequestUserOtherInfo(getApplication());
                final Handler handlerC = new Handler();
                handlerC.postDelayed(new Runnable() {
                    @Override
                    public void run() {

                        finish();
                        Intent intent = new Intent(Home.this,User.class);
                        startActivity(intent);
                    }
                }, 500);
            }
            else
            {
                Toast.makeText(Home.this, ""+result, Toast.LENGTH_SHORT).show();
            }

        }
    }, 500);

 public void AuthenticationRequest(final String username, final String password,Context c)
{
    requestQueue = Volley.newRequestQueue(c);
    request = new StringRequest(Request.Method.POST, controllerLinks.getUrlLogin(), new Response.Listener<String>()
    {
        @Override
        public void onResponse(String response) {
            try {
                JSONObject jsonObject = new JSONObject(response);
                setResult(jsonObject.getString("result"));

            } catch (JSONException e) {
                e.printStackTrace();
            }
        }
    }, new Response.ErrorListener() {@Override public void onErrorResponse(VolleyError error) {}}){ @Override
        protected Map<String, String> getParams() throws AuthFailureError {
            HashMap<String,String> hashMap = new HashMap<String, String>(){
                {
                    put("login","clicked");
                    put("username",username);
                    put("password",password);
                }
            };
            return hashMap;
        }
    };

    requestQueue.add(request);
}

我试图通过使用postDelayed解决我的问题，但我认为有更好的方法来处理问题，我只是不知道该怎么做，请帮忙。

01-11 13:46:34.606 3697-3697/com.example.a1412.alzhaid E/AndroidRuntime: FATAL EXCEPTION: main
                                                                     Process: com.example.a1412.alzhaid, PID: 3697
                                                                     java.lang.NullPointerException: Attempt to invoke virtual method 'boolean java.lang.String.equals(java.lang.Object)' on a null object reference
                                                                         at com.example.a1412.alzhaid.Home$5.run(Home.java:252)
                                                                         at android.os.Handler.handleCallback(Handler.java:751)
                                                                         at android.os.Handler.dispatchMessage(Handler.java:95)
                                                                         at android.os.Looper.loop(Looper.java:154)
                                                                         at android.app.ActivityThread.main(ActivityThread.java:6077)
                                                                         at java.lang.reflect.Method.invoke(Native Method)
                                                                         at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:865)
                                                                         at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:755)