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- 我沒有在我的代碼中使用任何列表視圖，我用適配器類來製作自定義日曆。 以前，它工作的很好。但是，因爲我需要實現從數據庫檢索任何特殊日期的背景圖像，我寫了代碼，但現在getView（）方法自動調用多次。
- 如果有人知道如何阻止它，請給我建議任何解決方案...
- 謝謝。
-
private static final int FIRST_DAY_OF_WEEK = Calendar.MONDAY; private final Calendar calendar; public final CalendarItem today; private final CalendarItem selected; private final LayoutInflater inflater; //added public static CalendarItem eventDate; //added private CalendarItem[] days; Context context; private List<Events> eventList; private String dateRetrived; private String dataRetrived; private int d; private int day1; private String dayS; private String intMonth; private String year; private List<Events> eventList1; private String dateRetrived1; private String dataRetrived1; private Date date1; private List<Events> dateListInDb; private String dateOfEvent; public CalendarAdapter(Context context, Calendar monthCalendar) { calendar = monthCalendar; today = new CalendarItem(monthCalendar); selected = new CalendarItem(monthCalendar); eventDate = new CalendarItem(monthCalendar); calendar.set(Calendar.DAY_OF_MONTH, 1); inflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE); this.context = context; } public int getCount() { return days.length; } public Object getItem(int position) { return days[position]; } public long getItemId(int position) { final CalendarItem item = days[position]; if (item != null) { return days[position].id; } return -1; } @SuppressLint("SimpleDateFormat") @SuppressWarnings("static-access") public View getView(int position, View view, ViewGroup parent) { if (view == null) { view = inflater.inflate(R.layout.calender_item, null); } Toast.makeText(context, "view starts ", Toast.LENGTH_SHORT).show(); final TextView dayView = (TextView)view.findViewById(R.id.date); final CalendarItem currentItem = days[position]; method(); Toast.makeText(context, "out ", Toast.LENGTH_SHORT).show(); //for now any date... event dates will be taken from DB.. if (currentItem == null) { dayView.setClickable(false); dayView.setFocusable(false); view.setBackgroundDrawable(null); dayView.setText(null); } else { if(currentItem.equals(today)) { view.setBackgroundResource(R.drawable.today_background); } else if (currentItem.equals(selected)) { view.setBackgroundResource(R.drawable.selected_background); // Toast.makeText(context, "tapped",Toast.LENGTH_LONG).show(); } else { view.setBackgroundResource(R.drawable.calnormalmdpi1); } dayView.setText(currentItem.text); } return view; } private void method() { DatabaseManager db = new DatabaseManager(context); DateFormat formatter = new SimpleDateFormat("yyyy-MM-dd"); dateListInDb = db.getAllDates(); Iterator<Events> iter = dateListInDb.iterator(); for (int j = 0 ; j < dateListInDb.size() ; j++) { Toast.makeText(context, "loop starts " + j, Toast.LENGTH_SHORT).show(); Events dateOfEvent = iter.next(); String dateOfEventSingle = dateOfEvent.getDateOfEvent(); try { date1 = formatter.parse(dateOfEventSingle); dayS = (String) android.text.format.DateFormat.format("dd", date1); intMonth = (String) android.text.format.DateFormat.format("MM", date1); //06 year = (String) android.text.format.DateFormat.format("yyyy", date1); eventDate = new CalendarItem(Integer.parseInt(year), Integer.parseInt(intMonth)-1,Integer.parseInt(dayS)); } catch (ParseException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } Toast.makeText(context, "loop ends " + j, Toast.LENGTH_SHORT).show(); //i = false; } } public final void setSelected(int year, int month, int day) { selected.year = year; selected.month = month; selected.day = day; notifyDataSetChanged(); } public final void refreshDays() { final int year = calendar.get(Calendar.YEAR); final int month = calendar.get(Calendar.MONTH); Toast.makeText(context, "Date : " + month, Toast.LENGTH_SHORT).show(); final int firstDayOfMonth = calendar.get(Calendar.DAY_OF_WEEK); final int lastDayOfMonth = calendar.getActualMaximum(Calendar.DAY_OF_MONTH); final int blankies; final CalendarItem[] days; if (firstDayOfMonth == FIRST_DAY_OF_WEEK) { blankies = 0; } else if (firstDayOfMonth < FIRST_DAY_OF_WEEK) { blankies = Calendar.SATURDAY - (FIRST_DAY_OF_WEEK - 1); } else { blankies = firstDayOfMonth - FIRST_DAY_OF_WEEK; } days = new CalendarItem[lastDayOfMonth + blankies]; for (int day = 1, position = blankies; position < days.length; position++) { days[position] = new CalendarItem(year, month, day++);//added dates } this.days = days; notifyDataSetChanged(); } public static class CalendarItem { public int year; public int month; public int day; public String text; public long id; public CalendarItem(Calendar calendar) { this(calendar.get(Calendar.YEAR), calendar.get(Calendar.MONTH), calendar.get(Calendar.DAY_OF_MONTH)); } public CalendarItem(int year, int month, int day) { this.year = year; this.month = month; this.day = day; this.text = String.valueOf(day); this.id = Long.valueOf(year + "" + month + "" + day); } @Override public boolean equals(Object o) { if (o != null && o instanceof CalendarItem) { final CalendarItem item = (CalendarItem)o; return item.year == year && item.month == month && item.day == day; } return false; } } }
方法返回'View'，因此它被調用適配器小部件中的每一行。你所能做的就是實現一些緩存機制，它將保存每一行的子部件，以避免性能下降和內存泄漏（如果你正在使用圖像）。 – Sajmon
getView方法將被稱爲days.length times – SKT
@SKT：當我將count數設爲1時，仍然是多次調用 – user2890202