calendar 获取系统时间

article/2025/10/3 13:41:15

文章目录

- - - 1、简介
    - 2、文件结构
    - 3、功能代码
    - 4、log 打印

1、简介

使用calendar 来获取系统时间，或者设定的时区时间

2、文件结构

在这里插入图片描述

3、功能代码

package com.example.tssh.mytimetest;import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.text.format.DateFormat;import java.util.Calendar;
import java.util.Locale;
import java.util.TimeZone;public class MainActivity extends AppCompatActivity {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);getUSTimeZone();    //获取美国时区时间getCurrentTimeZone();   //获取手机系统时区getCurrentLanguage();  //获取 手机系统语言getCurrentTime(); //获取当前手机时间}private void getUSTimeZone() {Calendar calendarUS = Calendar.getInstance();calendarUS.setTimeZone(TimeZone.getTimeZone("UT-6:00"));  //北美的时区int  hourUs   =  calendarUS.get(Calendar.HOUR_OF_DAY);int minuteUs = calendarUS.get(Calendar.MINUTE);System.out.println("获取美国时区时间： "  + hourUs + "时" + minuteUs + " 分");}//获取当前系统时间private void getCurrentTime() {Calendar calendar = Calendar.getInstance();int year ;int  month;int  day;int hour ;int minute;int second;boolean is24Time = DateFormat.is24HourFormat(this);//判断系统是不是 24 小时制year = calendar.get(Calendar.YEAR);month = calendar.get(Calendar.MONTH) + 1;day = calendar.get(Calendar.DAY_OF_MONTH);if (is24Time) {hour   =  calendar.get(Calendar.HOUR_OF_DAY);}else {hour   =  calendar.get(Calendar.HOUR);}minute = calendar.get(Calendar.MINUTE);second = calendar.get(Calendar.SECOND);System.out.println("获取的系统时间： " +"year: " + year + "\n" +"month: " + month + "\n"  +"day: " + day + "\n"   +"hour: " + hour + "\n"   +"minute: " + minute + "\n" +"second: " + second + "\n");}/*** 获取当前时区* @return*/public  String getCurrentTimeZone() {TimeZone tz = TimeZone.getDefault();String strTz = tz.getDisplayName(false, TimeZone.SHORT);System.out.println("系统时区：" + strTz);return strTz;}/*** 获取当前系统语言格式* @return*/public  String getCurrentLanguage(){Locale locale = getResources().getConfiguration().locale;String language=locale.getLanguage();String country = locale.getCountry();String lc=language+"_"+country;System.out.println("系统语言：" + lc);return lc;}
}