android - 如何在 Android (Kotlin) 中获取日期

Question

我是 Android 的初学者，我需要代码来获取今天的号码（从本地日期开始）。像这样：
Avar是Iday。今天是 10 月 8 日，所以Iday应该等于8.

标签： androiddatekotlindayofmonth

Answer 1

LocalDate#getDayOfMonth

import java.time.LocalDate;

public class Main {
    public static void main(String[] args) {
        // Today at the default time-zone (your JVM's time-zone)
        LocalDate date = LocalDate.now();

        // Day of month today
        int dayOfMonth = date.getDayOfMonth();

        // Display
        System.out.println("Today, the day of month is " + dayOfMonth);
    }
}

输出：

Today, the day of month is 8

如果您想在其他时区获取今天的日期，请使用LocalDate now(ZoneId zone)如下所示：

import java.time.LocalDate;
import java.time.ZoneId;

public class Main {
    public static void main(String[] args) {
        // Today at Melbourne
        LocalDate date = LocalDate.now(ZoneId.of("Australia/Melbourne"));

        // Day of month today
        int dayOfMonth = date.getDayOfMonth();

        // Display
        System.out.println("Today, the day of month is " + dayOfMonth);
    }
}

输出：

Today, the day of month is 9