有时候折线图横轴会显示 某个时间段的年月日
private List<String> getTwoDaysDay(String startDate, String endDate) {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
List<String> dateList = new ArrayList<String>();
try{
Date dateOne = sdf.parse(startDate);
Date dateTwo = sdf.parse(endDate);
Calendar calendar = Calendar.getInstance();
calendar.setTime(dateOne);
dateList.add(startDate);
while(calendar.getTime().before(dateTwo)){ //倒序时间,顺序after改before其他相应的改动。
calendar.add(Calendar.DAY_OF_MONTH, 1);
dateList.add(sdf.format(calendar.getTime()));
}
} catch(Exception e){
e.printStackTrace();
}
return dateList;
}
说明:参数值是 时间段的时间戳 毫秒值
获取折线图横轴 某一天的具体整数时间值
private List<String> getDay(Date startDate,Date endDate){
SimpleDateFormat formatter = new SimpleDateFormat( "HH:00");
String time1 = formatter.format(startDate);
String time2 = formatter.format(endDate);
Calendar instance = Calendar.getInstance();
instance.setTime(startDate);
List<String> dateList = new ArrayList<>();
dateList.add(time1);
while(instance.getTime().before(endDate)){
instance.add(Calendar.HOUR_OF_DAY,1);
dateList.add(formatter.format(instance.getTime()));
}
return dateList;
}
说明:参数值是 格式类型为 "yyyy-MM-dd HH:mm:ss SSS" 的date类型 可以用SimpleDateFormat 进行处理
大概的处理时间
Long endTime = ... (时间戳)
String formatEnd = simpleDateFormat1.format(endTime);
Date end = simpleDateFormat1.parse(formatEnd);