将setwhen_option添加到通知中？

Question

您希望在一段时间后收到通知。 所以我尝试设置setwhen_option。 但是时间不适用。 这是我的代码。 如何解决？

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    Button button = (Button) findViewById(R.id.button);
    button.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            NotificationManager notificationManager = (NotificationManager) MainActivity.this.getSystemService(MainActivity.this.NOTIFICATION_SERVICE);
            Intent intent1 = new Intent(MainActivity.this, MainActivity.class); 
            PendingIntent pendingNotificationIntent = PendingIntent.getActivity(MainActivity.this, 0, intent1, PendingIntent.FLAG_UPDATE_CURRENT);
            Notification.Builder builder = new Notification.Builder(MainActivity.this);

            builder.setWhen(new Date().getTime()+5000);
            builder.setShowWhen(true);
            builder.setSmallIcon(R.drawable.ic_launcher_background);
            builder.setTicker("abc");
            builder.setNumber(1);
            builder.setContentTitle("title");
            builder.setContentText("text");
            builder.setDefaults(Notification.DEFAULT_SOUND | Notification.DEFAULT_VIBRATE);
            builder.setContentIntent(pendingNotificationIntent);
            builder.setAutoCancel(true);
            builder.setOngoing(true);