// 取得目前日期 Date date = new Date(); DateFormat dateFormat = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss"); String currentDatetime = dateFormat.format(date); // 日期-1 Calendar day = Calendar.getInstance(); day.add(Calendar.DATE,-1); SimpleDateFormat sdf = new SimpleDateFormat( "yyyy-MM-dd "); System.out.println("yesterday =" + sdf.format(day.getTime())); // String 轉日期 String currentDate = "2012-12-13"; Date date = sdf.parse(currentDate); // 解析 Calendar calendar = Calendar.getInstance(); // 呼叫Calendar calendar.setTime(date); // 設定指定時間 int year=calendar.get(Calendar.YEAR); // 取得年月日 int month=calendar.get(Calendar.MONTH); int day=calendar.get(Calendar.DAY_OF_MONTH); String _year = Integer.toString(year); // 轉字串 String _month = Integer.toString(monthOfYear + 1); String _day = Integer.toString(dayOfMonth); String date = _year + "-" + _month + "-" + _day;
彈出日期選擇
void dateView(){ SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd"); try { //設定日期格式 Date date = sdf.parse(currentDate); Calendar calendar = Calendar.getInstance();//取得目前時間 calendar.setTime(date);//或是設定指定時間 int year=calendar.get(Calendar.YEAR); int month=calendar.get(Calendar.MONTH); int day=calendar.get(Calendar.DAY_OF_MONTH); new DatePickerDialog(this, new DatePickerDialog.OnDateSetListener() { @Override public void onDateSet(DatePicker view, int year,int monthOfYear, int dayOfMonth) { // 設置日曆 String _year = Integer.toString(year); String _month = Integer.toString(monthOfYear + 1); String _day = Integer.toString(dayOfMonth); String date = _year + "-" + _month + "-" + _day; currentDate = date; editDate.setText(date); } }, year, month, day).show(); } catch (ParseException e) { // TODO Auto-generated catch block e.printStackTrace(); } }