12人参与 • 2025-09-30 • Android
在项目开发中,难免会遇到使用当前时间,比如实现网络请求上传报文、预约、日历等功能。
在获取时间之前,首先要引入simpledateformat:
import java.text.simpledateformat;
实现代码:
simpledateformat formatter = new simpledateformat("yyyy年mm月dd日 hh:mm:ss"); date curdate = new date(system.currenttimemillis());//获取当前时间 string str = formatter.format(curdate);
str就是我们需要的时间,代码中(“yyyy年mm月dd日 hh:mm:ss”)这个时间的样式是可以根据我们的需求进行修改的,比如:20170901112253 ==> (“yyyymmddhhmmss”)
如果只想获取年月,代码如下:
simpledateformat formatter = new simpledateformat("yyyy-mm"); date curdate = new date(system.currenttimemillis());//获取当前时间 string str = formatter.format(curdate);
在获取之前,首先要引入contentresolver:
import android.content.contentresolver;
代码如下:
contentresolver cv = this.getcontentresolver(); string strtimeformat = android.provider.settings.system.getstring(cv, android.provider.settings.system.time_12_24); if(strtimeformat.equals("24")) { log.i("activity","24"); }
代码如下:
//字符串转时间戳 public static string gettime(string timestring){ string timestamp = null; simpledateformat sdf = new simpledateformat("yyyy年mm月dd日 hh:mm"); date d; try{ d = sdf.parse(timestring); long l = d.gettime(); timestamp = string.valueof(l); } catch(parseexception e){ e.printstacktrace(); } return timestamp; }
代码如下:
//时间戳转字符串 public static string getstrtime(string timestamp){ string timestring = null; simpledateformat sdf = new simpledateformat("yyyy年mm月dd日 hh:mm"); long l = long.valueof(timestamp); timestring = sdf.format(new date(l));//单位秒 return timestring; }
1.android中获取当前时间戳
android获取时间戳的四种方法如下:
long timecurrenttimemillis = system.currenttimemillis(); long timegettime =new date().gettime(); long timeseconds = system.currenttimemillis(); long timemillis = calendar.getinstance().gettimeinmillis(); log.d(tag, " 当前时间戳1--->:"+timecurrenttimemillis); log.d(tag, " 当前时间戳2--->:"+timegettime); log.d(tag, " 当前时间戳3--->:"+timeseconds); log.d(tag, " 当前时间戳4--->:"+timemillis);
2.android实现 时间戳与日期间的各种互换的时间工具类
完整代码如下:
package com.pts.peoplehui.utils; import java.text.simpledateformat; import java.util.calendar; import java.util.date; import java.util.locale; public class dateutils { public static string gettodaydatetime() { simpledateformat format = new simpledateformat(“yyyy-mm-dd hh:mm:ss”, locale.getdefault()); return format.format(new date()); } /** * 掉此方法输入所要转换的时间输入例如(”2014年06月14日16时09分00秒”)返回时间戳 * * @param time * @return */ public string data(string time) { simpledateformat sdr = new simpledateformat(“yyyy年mm月dd日hh时mm分ss秒”, locale.china); date date; string times = null; try { date = sdr.parse(time); long l = date.gettime(); string stf = string.valueof(l); times = stf.substring(0, 10); } catch (exception e) { e.printstacktrace(); } return times; } public static string gettodaydatetimes() { simpledateformat format = new simpledateformat(“mm月dd日”, locale.getdefault()); return format.format(new date()); } /** * 获取当前时间 * * @return */ public static string getcurrenttime_today() { simpledateformat sdf = new simpledateformat(“yyyy-mm-dd-hh-mm-ss”); return sdf.format(new java.util.date()); } /** * 调此方法输入所要转换的时间输入例如(”2014-06-14-16-09-00”)返回时间戳 * * @param time * @return */ public static string dataone(string time) { simpledateformat sdr = new simpledateformat(“yyyy-mm-dd-hh-mm-ss”, locale.china); date date; string times = null; try { date = sdr.parse(time); long l = date.gettime(); string stf = string.valueof(l); times = stf.substring(0, 10); } catch (exception e) { e.printstacktrace(); } return times; } public static string gettimestamp(string time, string type) { simpledateformat sdr = new simpledateformat(type, locale.china); date date; string times = null; try { date = sdr.parse(time); long l = date.gettime(); string stf = string.valueof(l); times = stf.substring(0, 10); } catch (exception e) { e.printstacktrace(); } return times; } /** * 调用此方法输入所要转换的时间戳输入例如(1402733340)输出(”2014年06月14日16时09分00秒”) * * @param time * @return */ public static string times(string time) { simpledateformat sdr = new simpledateformat(“yyyy年mm月dd日hh时mm分ss秒”); @suppresswarnings(“unused”) long lcc = long.valueof(time); int i = integer.parseint(time); string times = sdr.format(new date(i * 1000l)); return times; } /** * 调用此方法输入所要转换的时间戳输入例如(1402733340)输出(”2014-06-14 16:09:00”) * * @param time * @return */ public static string timedate(string time) { simpledateformat sdr = new simpledateformat(“yyyy-mm-dd hh:mm:ss”); @suppresswarnings(“unused”) long lcc = long.valueof(time); int i = integer.parseint(time); string times = sdr.format(new date(i * 1000l)); return times; } /** * 调用此方法输入所要转换的时间戳输入例如(1402733340)输出(”2014年06月14日16:09”) * * @param time * @return */ public static string timet(string time) { simpledateformat sdr = new simpledateformat(“yyyy年mm月dd日 hh:mm”); @suppresswarnings(“unused”) long lcc = long.valueof(time); int i = integer.parseint(time); string times = sdr.format(new date(i * 1000l)); return times; } /** * @param time斜杠分开 * @return */ public static string timeslash(string time) { simpledateformat sdr = new simpledateformat(“yyyy/mm/dd,hh:mm”); @suppresswarnings(“unused”) long lcc = long.valueof(time); int i = integer.parseint(time); string times = sdr.format(new date(i * 1000l)); return times; } /** * @param time斜杠分开 * @return */ public static string timeslashdata(string time) { simpledateformat sdr = new simpledateformat(“yyyy/mm/dd”); @suppresswarnings(“unused”) long lcc = long.valueof(time); // int i = integer.parseint(time); string times = sdr.format(new date(lcc * 1000l)); return times; } /** * @param time斜杠分开 * @return */ public static string timeminute(string time) { simpledateformat sdr = new simpledateformat(“hh:mm”); @suppresswarnings(“unused”) long lcc = long.valueof(time); int i = integer.parseint(time); string times = sdr.format(new date(i * 1000l)); return times; } public static string tim(string time) { simpledateformat sdr = new simpledateformat(“yyyymmdd hh:mm”); @suppresswarnings(“unused”) long lcc = long.valueof(time); int i = integer.parseint(time); string times = sdr.format(new date(i * 1000l)); return times; } public static string time(string time) { simpledateformat sdr = new simpledateformat(“yyyy-mm-dd hh:mm”); @suppresswarnings(“unused”) long lcc = long.valueof(time); int i = integer.parseint(time); string times = sdr.format(new date(i * 1000l)); return times; } // 调用此方法输入所要转换的时间戳例如(1402733340)输出(”2014年06月14日16时09分00秒”) public static string times(long timestamp) { simpledateformat sdr = new simpledateformat(“mm月dd日 # hh:mm”); return sdr.format(new date(timestamp)).replaceall(“#”, getweek(timestamp)); } private static string getweek(long timestamp) { int mydate = 0; string week = null; calendar cd = calendar.getinstance(); cd.settime(new date(timestamp)); mydate = cd.get(calendar.day_of_week); // 获取指定日期转换成星期几 if (mydate == 1) { week = ”周日”; } else if (mydate == 2) { week = ”周一”; } else if (mydate == 3) { week = ”周二”; } else if (mydate == 4) { week = ”周三”; } else if (mydate == 5) { week = ”周四”; } else if (mydate == 6) { week = ”周五”; } else if (mydate == 7) { week = ”周六”; } return week; } // 并用分割符把时间分成时间数组 /** * 调用此方法输入所要转换的时间戳输入例如(1402733340)输出(”2014-06-14-16-09-00”) * * @param time * @return */ public string timesone(string time) { simpledateformat sdr = new simpledateformat(“yyyy-mm-dd-hh-mm-ss”); @suppresswarnings(“unused”) long lcc = long.valueof(time); int i = integer.parseint(time); string times = sdr.format(new date(i * 1000l)); return times; } public static string timestwo(string time) { simpledateformat sdr = new simpledateformat(“yyyy-mm-dd”); @suppresswarnings(“unused”) long lcc = long.valueof(time); int i = integer.parseint(time); string times = sdr.format(new date(i * 1000l)); return times; } /** * 并用分割符把时间分成时间数组 * * @param time * @return */ public static string[] timestamp(string time) { simpledateformat sdr = new simpledateformat(“yyyy年mm月dd日hh时mm分ss秒”); @suppresswarnings(“unused”) long lcc = long.valueof(time); int i = integer.parseint(time); string times = sdr.format(new date(i * 1000l)); string[] fenge = times.split(”[年月日时分秒]”); return fenge; } /** * 根据传递的类型格式化时间 * * @param str * @param type * 例如:yy-mm-dd * @return */ public static string getdatetimebymillisecond(string str, string type) { date date = new date(long.valueof(str)); simpledateformat format = new simpledateformat(type); string time = format.format(date); return time; } /** * 分割符把时间分成时间数组 * * @param time * @return */ public string[] division(string time) { string[] fenge = time.split(”[年月日时分秒]”); return fenge; } /** * 输入时间戳变星期 * * @param time * @return */ public static string changeweek(string time) { simpledateformat sdr = new simpledateformat(“yyyy年mm月dd日hh时mm分ss秒”); long lcc = long.valueof(time); int i = integer.parseint(time); string times = sdr.format(new date(i * 1000l)); date date = null; int mydate = 0; string week = null; try { date = sdr.parse(times); calendar cd = calendar.getinstance(); cd.settime(date); mydate = cd.get(calendar.day_of_week); // 获取指定日期转换成星期几 } catch (exception e) { // todo auto-generated catch block e.printstacktrace(); } if (mydate == 1) { week = ”星期日”; } else if (mydate == 2) { week = ”星期一”; } else if (mydate == 3) { week = ”星期二”; } else if (mydate == 4) { week = ”星期三”; } else if (mydate == 5) { week = ”星期四”; } else if (mydate == 6) { week = ”星期五”; } else if (mydate == 7) { week = ”星期六”; } return week; } /** * 获取日期和星期 例如:2014-11-13 11:00 星期一 * * @param time * @param type * @return */ public static string getdateandweek(string time, string type) { return getdatetimebymillisecond(time + “000”, type) + “ ” + changeweekone(time); } /** * 输入时间戳变星期 * * @param time * @return */ public static string changeweekone(string time) { simpledateformat sdr = new simpledateformat(“yyyy-mm-dd-hh-mm-ss”); long lcc = long.valueof(time); int i = integer.parseint(time); string times = sdr.format(new date(i * 1000l)); date date = null; int mydate = 0; string week = null; try { date = sdr.parse(times); calendar cd = calendar.getinstance(); cd.settime(date); mydate = cd.get(calendar.day_of_week); // 获取指定日期转换成星期几 } catch (exception e) { // todo auto-generated catch block e.printstacktrace(); } if (mydate == 1) { week = ”星期日”; } else if (mydate == 2) { week = ”星期一”; } else if (mydate == 3) { week = ”星期二”; } else if (mydate == 4) { week = ”星期三”; } else if (mydate == 5) { week = ”星期四”; } else if (mydate == 6) { week = ”星期五”; } else if (mydate == 7) { week = ”星期六”; } return week; } /** * 获取当前时间 * * @return */ public static string getcurrenttime() { simpledateformat sdf = new simpledateformat(“yyyy-mm-dd hh:mm”); return sdf.format(new java.util.date()); } /** * 输入日期如(2014年06月14日16时09分00秒)返回(星期数) * * @param time * @return */ public string week(string time) { date date = null; simpledateformat sdr = new simpledateformat(“yyyy年mm月dd日hh时mm分ss秒”); int mydate = 0; string week = null; try { date = sdr.parse(time); calendar cd = calendar.getinstance(); cd.settime(date); mydate = cd.get(calendar.day_of_week); // 获取指定日期转换成星期几 } catch (exception e) { // todo auto-generated catch block e.printstacktrace(); } if (mydate == 1) { week = ”星期日”; } else if (mydate == 2) { week = ”星期一”; } else if (mydate == 3) { week = ”星期二”; } else if (mydate == 4) { week = ”星期三”; } else if (mydate == 5) { week = ”星期四”; } else if (mydate == 6) { week = ”星期五”; } else if (mydate == 7) { week = ”星期六”; } return week; } /** * 输入日期如(2014-06-14-16-09-00)返回(星期数) * * @param time * @return */ public string weekone(string time) { date date = null; simpledateformat sdr = new simpledateformat(“yyyy-mm-dd-hh-mm-ss”); int mydate = 0; string week = null; try { date = sdr.parse(time); calendar cd = calendar.getinstance(); cd.settime(date); mydate = cd.get(calendar.day_of_week); // 获取指定日期转换成星期几 } catch (exception e) { // todo auto-generated catch block e.printstacktrace(); } if (mydate == 1) { week = ”星期日”; } else if (mydate == 2) { week = ”星期一”; } else if (mydate == 3) { week = ”星期二”; } else if (mydate == 4) { week = ”星期三”; } else if (mydate == 5) { week = ”星期四”; } else if (mydate == 6) { week = ”星期五”; } else if (mydate == 7) { week = ”星期六”; } return week; } }
3.android获取时间戳,以及将时间戳转换为时间
代码如下:
package com.androidtimestampdemo; import java.text.simpledateformat; import java.util.calendar; import java.util.date; import java.util.locale; import android.app.activity; import android.os.bundle; import android.util.log; public class mainactivity extends activity { private long timecurrenttimemillis; private long timegettime; private long timeseconds; private long timemillis; @override protected void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.activity_main); init(); } private void init() { /** * 以下是获取现在的系统时间戳的几种方法,实际开发中可能需要服务端返回所需的时间戳 ; * 但是实际开发中服务端返回的时间戳可能是字符串等,需要转换为long等,可采用如下方法直接转换: * integer.parseint(string s) long.parselong(string s) * float.parsefloat(string s) double.parsedouble(string s) */ timecurrenttimemillis = system.currenttimemillis(); timegettime = new date().gettime(); timeseconds = system.currenttimemillis(); timemillis = calendar.getinstance().gettimeinmillis(); /** * 通过打印信息可以看到,这几种获取系统时间的时间戳几乎是一样的。 */ log.d("zhongyao", "timecurrenttimemillis" + timecurrenttimemillis + "@@@" + "timegettime" + timegettime + "@@@timeseconds" + timeseconds + "timemillis" + timemillis); /** * 时间戳转换成具体时间形式 */ simpledateformat sdf = new simpledateformat("yyyy年mm月dd日", locale.getdefault()); string time1 = sdf.format(timeseconds); string time2 = sdf.format(timegettime); log.d("zhongyao", timeseconds + " 现在的时间1->:" + time1); log.d("zhongyao", timegettime + " 现在的时间2-->:" + time2); simpledateformat sdftwo = new simpledateformat("yyyy年mm月dd日hh时mm分ss秒e", locale.getdefault()); string time11 = sdftwo.format(timeseconds); string time22 = sdftwo.format(timegettime); log.d("zhongyao", timeseconds + " 现在的时间11->:" + time11); log.d("zhongyao", timegettime + " 现在的时间22-->:" + time22); /** * 而最常用的: * 由于服务端返回的一般是unix时间戳,所以需要把unix时间戳timestamp转换成固定格式的字符串 */ string result = formatdata("yyyy-mm-dd", 1414994617); log.d("zhongyao", result); } public static string formatdata(string dataformat, long timestamp) { if (timestamp == 0) { return ""; } timestamp = timestamp * 1000; string result = ""; simpledateformat format = new simpledateformat(dataformat); result = format.format(new date(timestamp)); return result; } }
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