我需要一周中的名字,但是依赖于实际的日期和日期。例如,我需要今天的名字,然后明天的名字,日期的名称+2天等我制作这个代码但不能正常工作。那么有什么更好的方法可以让我在android中获得一天的名字?
public String getDay3Name() {
Calendar calendar = Calendar.getInstance();
calendar.setTime(new Date());
String[] days = new String[] { "SUNDAY","SUNDAY","SUNDAY", "MONDAY", "TUESDAY", "WEDNESDAY", "THURSDAY", "FRIDAY", "SATURDAY" };
String day = days[calendar.get(Calendar.DAY_OF_WEEK)+1];
return day;
}
public String getDay4Name() {
Calendar calendar = Calendar.getInstance();
calendar.setTime(new Date());
String[] days = new String[] { "SUNDAY","SUNDAY","SUNDAY", "MONDAY", "TUESDAY", "WEDNESDAY", "THURSDAY", "FRIDAY", "SATURDAY" };
String day = days[calendar.get(Calendar.DAY_OF_WEEK)+2];
return day;
}
答案 0 :(得分:2)
您可以直接使用
calendar.getDisplayName(Calendar.DAY_OF_WEEK, Calendar.LONG, Locale.US);
使用
设置日历calendar.setTime();
您可以使用 -
在日历中设置日期calendar.set(int year, int month, int day);
希望有所帮助
答案 1 :(得分:2)
import java.util.Calendar;
import java.util.Locale;
public class CalSample {
private static final int TODAY = 0;
private static final int TOMORROW = 1;
private static final int DAY_AFTER_TOMORROW = 2;
private static final int THREE_DAYS_FROM_TODAY = 3;
private static final int FOUR_DAYS_FROM_TODAY = 4;
private static final int FIVE_DAYS_FROM_TODAY = 5;
private static final int SIX_DAYS_FROM_TODAY = 6;
public static void main(String args[]){
CalSample calSample = new CalSample();
calSample.getNameOfDayOfWeek(TODAY);
calSample.getNameOfDayOfWeek(TOMORROW);
calSample.getNameOfDayOfWeek(DAY_AFTER_TOMORROW);
calSample.getNameOfDayOfWeek(THREE_DAYS_FROM_TODAY);
calSample.getNameOfDayOfWeek(FOUR_DAYS_FROM_TODAY);
calSample.getNameOfDayOfWeek(SIX_DAYS_FROM_TODAY);
}
public String getNameOfDayOfWeek(int noOfDaysFromToday){
Calendar calendar = Calendar.getInstance();
calendar.add(Calendar.DAY_OF_YEAR, noOfDaysFromToday);
String name = calendar.getDisplayName(Calendar.DAY_OF_WEEK, Calendar.LONG, Locale.ENGLISH);
System.out.println("Day Of Week:- " + name);
return name;
}
}
答案 2 :(得分:1)
首先,您在从String数组中获取日期名称方面做得很好,但如果从资源(strings.xml)获取它们以便将来支持多语言,那么它会更好。
其次,你应该知道从calendar.get(Calendar.DAY_OF_WEEK)
得到什么样的结果;方法:
Calendar.SUNDAY = (1)
Calendar.MONDAY = (2)
Calendar.TUESDAY = (3)
Calendar.WEDNESDAY = (4)
Calendar.THURSDAY = (5)
Calendar.FRIDAY = (6)
Calendar.SATURDAY = (7)
最后,你的日期名称数组是错误的;
new String[] { "SUNDAY","SUNDAY","SUNDAY", "MONDAY", "TUESDAY", "WEDNESDAY", "THURSDAY", "FRIDAY", "SATURDAY" };
应该是;
new String[] {"SUNDAY", "MONDAY", "TUESDAY", "WEDNESDAY", "THURSDAY", "FRIDAY", "SATURDAY" };
你可以尝试下面的方法,它们只是对你的方法进行了一些修改。
/**
*
* @param next
* @return
*
* send next 0 if you want to get current day name
*/
public String getDayName(int next) {
int dayIndex = getCurrentDayIndex() - 1;
dayIndex += next;
dayIndex = dayIndex % 7;
String[] days = new String[] {"SUNDAY", "MONDAY", "TUESDAY", "WEDNESDAY", "THURSDAY", "FRIDAY", "SATURDAY" };
String day = days[dayIndex];
return day;
}
/**
*
* @return 1,2,3,4,5,6 or 7
*/
public int getCurrentDayIndex() {
Calendar calendar = Calendar.getInstance();
calendar.setTime(new Date());
int dayIndex = calendar.get(Calendar.DAY_OF_WEEK);
return dayIndex;
}