클래스 안 클래스에 값을 전달하고 싶어요

Question

public class Calendar2 extends AppCompatActivity {
    private final OneDayDecorator oneDayDecorator = new OneDayDecorator();
    MaterialCalendarView materialCalendarView;
    static final int REQ_ADD_CONTACT=1;
    static String data;

    private FirebaseFirestore db;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_calendar);

        materialCalendarView = (MaterialCalendarView) findViewById(R.id.calendarView);
        ImageButton add_btn = (ImageButton) findViewById(R.id.add_btn);


        add_btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Toast.makeText(getApplicationContext(), "기록장 추가 버튼", Toast.LENGTH_SHORT).show();
                Intent intent = new Intent(Calendar2.this, AddDiary.class);
                startActivityForResult(intent,REQ_ADD_CONTACT);
            }
        });

        materialCalendarView.state().edit()
                .setFirstDayOfWeek(Calendar.SUNDAY)
                .setMinimumDate(CalendarDay.from(2017, 0, 1)) // 달력의 시작
                .setMaximumDate(CalendarDay.from(2030, 11, 31)) // 달력의 끝
                .setCalendarDisplayMode(CalendarMode.MONTHS)
                .commit();

        materialCalendarView.addDecorators(
                new SundayDecorator(),
                new SaturdayDecorator(),
                oneDayDecorator);


        final String[] result = {"2017,03,18", "2017,04,18", "2017,05,18", "2017,06,18"};


        materialCalendarView.setOnDateChangedListener(new OnDateSelectedListener() {
            @Override
            public void onDateSelected(@NonNull MaterialCalendarView widget, @NonNull CalendarDay date, boolean selected) {
                int Year = date.getYear();
                int Month = date.getMonth() + 1;
                int Day = date.getDay();

                Log.i("Year test", Year + "");
                Log.i("Month test", Month + "");
                Log.i("Day test", Day + "");

                String shot_Day = Year + "," + Month + "," + Day;

                Log.i("shot_Day test", shot_Day + "");
                materialCalendarView.clearSelection();

                Toast.makeText(getApplicationContext(), shot_Day, Toast.LENGTH_SHORT).show();
            }
        });

        db = FirebaseFirestore.getInstance();
        String dgKey = FirebaseAuth.getInstance().getCurrentUser().getUid()+"000";
        db.collection("DiaryGroupList").document(dgKey)
                .collection("diaryList").get()
                .addOnCompleteListener(new OnCompleteListener<QuerySnapshot>() {
                    @Override
                    public void onComplete(@NonNull Task<QuerySnapshot> task) {
                        if (task.isSuccessful()) {
                            for (QueryDocumentSnapshot document : task.getResult()) {
                                //Toast.makeText(Calendar2.this,document.getData().get("date").toString(),Toast.LENGTH_LONG).show();
                                data=document.getData().get("date").toString();
                                TextView textViewNo = (TextView) findViewById(R.id.textViewNo);
                                textViewNo.setText(data);

                                Intent intent = new Intent(Calendar2.this, ApiSimulator.class);
                                intent.putExtra("date", document.getData().get("date").toString());


                                }
                        }
                    }
                });

    }

    class ApiSimulator extends AsyncTask<Void, Void, List<CalendarDay>> {


        @Override
        protected List<CalendarDay> doInBackground(@NonNull Void... voids) {
            try {
                Thread.sleep(500);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }

            Calendar calendar = Calendar.getInstance();
            ArrayList<CalendarDay> dates = new ArrayList<>();
            /*특정날짜 달력에 점표시해주는곳*/
            /*월은 0이 1월 년,일은 그대로*/
            //string 문자열인 Time_Result 을 받아와서 ,를 기준으로짜르고 string을 int 로 변환

            calendar.set(year, month - 1, dayy);
            CalendarDay day = CalendarDay.from(calendar);

            Intent intent = getIntent();
            String date = intent.getStringExtra("date");
            Toast.makeText(Calendar2.this,date,Toast.LENGTH_LONG).show();


            //String ddddd = year + "," + month+ "," +dayy;
            //Toast.makeText(getApplicationContext(), ddddd, Toast.LENGTH_SHORT).show();
            dates.add(day);
            return dates;
        }

        @Override
        protected void onPostExecute(@NonNull List<CalendarDay> calendarDays) {
            super.onPostExecute(calendarDays);
            if (isFinishing()) {
                return;
            }
            materialCalendarView.addDecorator(new EventDecorator(Color.RED, calendarDays, Calendar2.this));
        }
    }
}

첫번째 Calendar2에는 잘 들어가는데 그 값을

ApiSimulator 로 date 값을 전달하고 싶습니다

Answer 1

 제가 질문을 이해한 거라면,

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        // 생략

        db.collection("DiaryGroupList").document(dgKey)
            .collection("diaryList").get()
            .addOnCompleteListener(new OnCompleteListener<QuerySnapshot>() {
                @Override
                public void onComplete(@NonNull Task<QuerySnapshot> task) {
                    if (task.isSuccessful()) {
                        List<String> dates = new ArrayList<>();  
                        for (QueryDocumentSnapshot document : task.getResult()) {
                            //Toast.makeText(Calendar2.this,document.getData().get("date").toString(),Toast.LENGTH_LONG).show();
                            data = document.getData().get("date").toString();
                            TextView textViewNo = (TextView) findViewById(R.id.textViewNo);
                            textViewNo.setText(data);

                            dates.add(data);
                            
                        }

                        if (data.size > 0) {
                            executeApiSumlator(data);
                        }
                    }
                }
            });

    }

    private void executeApiSumlator(dates: List<String>) {
        ApiSimulator ApiSimulator = new ApiSimulator(dates);
        ApiSimulator.execute();
    }

 

그냥 이렇게 하시면 되는 건 아닌가요? AsyncTask는 Intent를 통해 호출하실 수 없고 호출하실 필요도 없는데...