Android 获取时间实例代码

 import java.text.DateFormat; import java.text.ParseException; import java.text.SimpleDateFormat; import java.util.Calendar; import java.util.Date; /** * Created by Administrator on 2017/5/8. */ public class GetTime { public static void main(String[] args) { Date date = new Date(); System.out.println(date);//Mon May 08 14:27:44 CST 2017 System.out.println(new SimpleDateFormat("yyyy-MM-dd hh:mm:ss").format(date));//2017-05-08 02:27:44 long millis = System.currentTimeMillis(); System.out.println(millis);//1494224864479 System.out.println(new SimpleDateFormat("yyyy-MM-dd hh:mm:ss").format(millis));//2017-05-08 02:27:44 //yyyy-MM-dd  E  hh:mm:ss.sss //年-月-日   星期  时:分:秒.毫秒 System.out.println(new SimpleDateFormat("yyyy-MM-dd E hh:mm:ss.sss").format(date));//2017-05-08 星期一 02:27:44.044 System.out.println(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.sss").format(date));//2017-05-08 14:27:44.044 System.out.println(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(date));//2017-05-08 14:27:44 System.out.println(new SimpleDateFormat("yyyy-MM-dd HH:mm").format(date));//2017-05-08 14:27 System.out.println(new SimpleDateFormat().format(date));//17-5-8 下午2:27 :默认 compareDataToNow("2017-05-03 12:45:00"); try { Date date1 = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").parse("2017-05-03 12:45:00"); compareToNowDate(date1); } catch (ParseException e) { e.printStackTrace(); } getWeek(); getTime1(); getTime2(); } static void getTime1() { long time = System.currentTimeMillis(); //long now = android.os.SystemClock.uptimeMillis(); SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); Date d1 = new Date(time); String t1 = format.format(d1); System.out.println("SimpleDateFormat时间===" + t1);//2017-05-08 12:44:10 SimpleDateFormat f4 = new SimpleDateFormat("今天是" + "yyyy年MM月dd日 E kk点mm分"); System.out.println("f4======" + f4.format(new Date()));//今天是2017年05月08日 星期一 14点15分 SimpleDateFormat f3 = new SimpleDateFormat("今天是" + "hh小时mm分钟"); System.out.println("f3======" + f3.format(new Date()));//今天是02小时15分钟 SimpleDateFormat f2 = new SimpleDateFormat("今天是" + "kk点mm分钟"); System.out.println("f2======" + f2.format(new Date()));//今天是14点17分钟 } static void getTime2() { Calendar calendar = Calendar.getInstance(); String created = calendar.get(Calendar.YEAR) + "年" + (calendar.get(Calendar.MONTH) + 1) + "月"//从0计算 + calendar.get(Calendar.DAY_OF_MONTH) + "日" + calendar.get(Calendar.HOUR_OF_DAY) + "时" + calendar.get(Calendar.MINUTE) + "分" + calendar.get(Calendar.SECOND) + "s"; System.out.println("Calendar时间====" + created);//时间：2017年5月8日12时33分24s } static void getWeek() { Calendar calendar = Calendar.getInstance(); int day = calendar.get(Calendar.DAY_OF_WEEK); String today = null; if (day == 2) { today = "Monday"; } else if (day == 3) { today = "Tuesday"; } else if (day == 4) { today = "Wednesday"; } else if (day == 5) { today = "Thursday"; } else if (day == 6) { today = "Friday"; } else if (day == 7) { today = "Saturday"; } else if (day == 1) { today = "Sunday"; } System.out.println("Today is:- " + today);//Today is:- Monday } //计算日期之间相隔几天： static long compareDataToNow(String date) { SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); Date passDate, nowDate; long diff = -100l, days = -100l; try { passDate = sdf.parse(date); String nowStr = sdf.format(new Date()); nowDate = sdf.parse(nowStr); diff = passDate.getTime() - nowDate.getTime();//long型的毫秒数 days = diff / (1000 * 60 * 60 * 24); System.out.println("相隔：" + days + "天" + " nowDate.getTime()=====" + nowDate.getTime());//-5天 } catch (ParseException e) { e.printStackTrace(); } return diff; } //计算日期之间相隔几天： static long compareToNowDate(Date date) { long diff = -100l, days = -100l; Date nowDate = new Date(); diff = date.getTime() - nowDate.getTime();//long型的毫秒数 days = diff / (1000 * 60 * 60 * 24); System.out.println("相隔：" + days + "天" + " nowDate.getTime()=====" + nowDate.getTime());//-5天 return diff; } }