안드로이드 커스텀 달력 만들기 - ArrayList<HashMap<String, String>> calList

안드로이드 달력 만들기 MainActivity.java 와 GridCellAdapter.java 파일에서 아래와 같이 ArrayList 제네릭으로 HashMap<String, String> 을 사용하는 방법이다.

ArrayList<Calendar_Item> calList = new ArrayList<>();

를

ArrayList<HashMap<String, String>> calList = new ArrayList<>();

로 변경하여 코딩하면 어떻게 처리해야 할까?

Calendar_Item 이 HashMap<String, String> 라는 것으로 변경된 것만 살펴보고 수정해주면 된다.

private Calendar_Item calendarItem(String year, String month, String day, int weekday, String color, String name, String key){         Calendar_Item item = new Calendar_Item();         item.setYear(year);         item.setMonth(month);         item.setDay(day);         item.setWeekday(weekday);         item.setColor(color);         item.setEvent(name);         item.setKey(key);         return item;     }     private void addCalendarItem(String year, String month, String day, int weekday, String color,String name, String key){         Calendar_Item item = calendarItem(year,month,day,weekday,color,name,key);         calList.add(item);     }     private int getIndexOfCalList(String search_key) {         for (int temp = 0; temp < calList.size(); temp++) {             String key = calList.get(temp).getKey();             if (key != null && key.equals(search_key)) {                 return temp;             }         }         return -1;     }

private HashMap<String, String> calendarItem(String year, String month, String day, int weekday, String color, String name, String key){         HashMap<String, String> map = new HashMap<String, String>();         map.put("year",year);         map.put("month",month);         map.put("day",day);         map.put("weekday", String.valueOf(weekday));         map.put("color",color);         map.put("event",name);         map.put("key",key);         return map;     }     private void addCalendarItem(String year, String month, String day, int weekday, String color,String name, String key){         HashMap<String, String> item = calendarItem(year,month,day,weekday,color,name,key);         calList.add(item);     }     private int getIndexOfCalList(String search_key) {         for (int temp = 0; temp < calList.size(); temp++) {             String key = calList.get(temp).get("key");             if (key != null && key.equals(search_key)) {                 return temp;             }         }         return -1;     }

GridCellAdapter 에서 변경해줄 것은 아래와 같다.

private final ArrayList<Calendar_Item> calList;     public GridCellAdapter(Context context, ArrayList<Calendar_Item> list) {         mContext = context;         calList = list;     }     public Calendar_Item getItem(int position) {         return calList.get(position);     }         String theday = calList.get(position).getDay();         int themonth = Integer.parseInt(calList.get(position).getMonth());         String theyear = calList.get(position).getYear();         String holiday = calList.get(position).getEvent();

private final ArrayList<HashMap<String, String>> calList;     public GridCellAdapter(Context context, ArrayList<HashMap<String, String>> list) {         mContext = context;         calList = list;     }     public HashMap<String, String> getItem(int position) {         return calList.get(position);     }         String theday = calList.get(position).get("day");         int themonth = Integer.parseInt(calList.get(position).get("month"));         String theyear = calList.get(position).get("year");         String holiday = calList.get(position).get("event");

ArrayList<HashMap<String, String>> 를 사용하면 아래와 같은 Calendar_Item Class 를 만들 필요가 없어 코드가 좀 더 간단해질 수 있다.

public class Calendar_Item {     private  String year; // 년     private  String month; // 월     private  String day; // 일     private  int weekday; // 요일     private  String color; // 색상     private String event;     private String key; // 월일 값을 key 로 사용     public Calendar_Item() {     }     public Calendar_Item(String year, String month, String day, int weekday, String color) {         this.year = year;         this.month = month;         this.day = day;         this.weekday = weekday;         this.color = color;     }     public String getYear() {         return year;     }     public void setYear(String year) {         this.year = year;     }     public String getMonth() {         return month;     }     public void setMonth(String month) {         this.month = month;     }     public String getDay() {         return day;     }     public void setDay(String day) {         this.day = day;     }     public int getWeekday() {         return weekday;     }     public void setWeekday(int weekday) {         this.weekday = weekday;     }     public String getColor() {         return color;     }     public void setColor(String color) {         this.color = color;     }     public String getEvent() {         return event;     }     public void setEvent(String event) {         this.event = event;     }     public String getKey() {         return key;     }     public void setKey(String key) {         this.key = key;     } }