英文:
Change Date to Local time zone of the device in Java
问题
我从数据库中获取到一个 Date 类型的值。这是一个示例：Wed Jul 29 13:03:00 GMT +03:00 2020。我有以下方法将其转换为字符串：
public static final String VIEW_DATE_FORMAT = "dd MMM yyyy HH:mm";
public static String dateToString(Date date){
DateFormat dateFormat = new SimpleDateFormat(General.VIEW_DATE_FORMAT , Locale.getDefault());
if(date == null)
return "";
return dateFormat.format(date);
}
我的问题是如何将日期转换为安装应用程序的设备的本地时区？我希望日期变成 Wed Jul 29 2020 16:03:00，但实际上得到的是 Wed Jul 29 2020 13:03:00。
英文:
I'm getting a value of type Date from the Database. Here is an example Wed Jul 29 13:03:00 GMT +03:00 2020
and I have the following method to convert it to string
public static final String VIEW_DATE_FORMAT = "dd MMM yyyy HH:mm";
public static String dateToString(Date date){
DateFormat dateFormat = new SimpleDateFormat(General.VIEW_DATE_FORMAT , Locale.getDefault());
if(date == null)
return "";
return dateFormat.format(date);
}
My Question is how to convert the date to the Local time zone of the device the app is installed on ?
I want the date to become Wed Jul 29 2020 16:03:00 but I'm getting Wed Jul 29 2020 13:03:00 instead
答案1
得分: 1
如果您使用至少API级别26，则应使用ZonedDateTime类，然后可以将其转换为LocalDateTime。
要将Date对象转换为ZonedDateTime，请参考Java8 java.util.Date转换为java.time.ZonedDateTime。
要将ZonedDateTime转换为LocalDateTime，请参考在时区中将ZonedDateTime转换为LocalDateTime。
英文:
If you are using at least API level 26 then you should use class ZonedDateTime which you can then convert to a LocalDateTime.
To convert a Date object to ZonedDateTime, refer to Java8 java.util.Date conversion to java.time.ZonedDateTime
To convert ZonedDateTime to LocalDateTime, refer to Convert ZonedDateTime to LocalDateTime at time zone
答案2
得分: 0
public String local_time(String date)
{
Time time = new Time();
try {
date = date.replace("GMT +", "GMT+");
time.set(new SimpleDateFormat("E MMM dd HH:mm:ss Z yyyy").parse(date).getTime());
} catch (ParseException e) {
e.printStackTrace();
}
String timeString = time.format("%a %b %d %H:%M:%S %Z %Y");
/* changing time zone */
time.switchTimezone(Time.getCurrentTimezone());
timeString = time.format("%a %b %d %H:%M:%S %Z %Y");
return timeString;
}
// Call it like:
// String loc_time = local_time("Wed Jul 29 13:03:00 GMT +03:00 2020");
Remember to import android.text.format.Time:
import android.text.format.Time;
英文:
public String local_time(String date)
{
Time time = new Time();
try {
date= date.replace("GMT +","GMT+");
time.set(new SimpleDateFormat("E MMM dd HH:mm:ss Z yyyy").parse(date).getTime());
} catch (ParseException e) {
e.printStackTrace();
}
String timeString = time.format("%a %b %d %H:%M:%S %Z %Y");
// Log.e("Time string ",""+timeString);
/* changing time zone */
time.switchTimezone(Time.getCurrentTimezone());
// Log.e("Time zone ",""+Time.getCurrentTimezone());
timeString = time.format("%a %b %d %H:%M:%S %Z %Y");
// Log.e("New time ",""+timeString);
return timeString;
}
call it like String loc_time=local_time("Wed Jul 29 13:03:00 GMT +03:00 2020");
remember to import android.text.format.Time : import android.text.format.Time;
通过集体智慧和协作来改善编程学习和解决问题的方式。致力于成为全球开发者共同参与的知识库，让每个人都能够通过互相帮助和分享经验来进步。
评论