[英]Difference between two dates and TimeZone
String s1 = "00:00:00.221";
String s2 = "00:00:44.221";
Calendar c1 = Calendar.getInstance();
Calendar c2 = Calendar.getInstance();
Calendar c3 = Calendar.getInstance();
SimpleDateFormat myformat= new SimpleDateFormat("HH:mm:ss.SSS");
c1.setTime(myformat.parse(s1));
c2.setTime(myformat.parse(s2));
long mills= c2.getTimeInMillis() - c1.getTimeInMillis();
c3.setTimeInMillis(mills);
String g1 = String.valueOf(c3.get(Calendar.HOUR));
String g2 = String.valueOf(c3.get(Calendar.MINUTE));
String g3 = String.valueOf(c3.get(Calendar.SECOND));
String g4 = String.valueOf(c3.get(Calendar.MILLISECOND));
String res = g1 + ":" + g2 + ":" + g3 + "."+g4;
我希望res = "00:00:44.000"但res = "03:00:44.000"
為什么g1是3小時?
我認為它的時區。 但為什么? 怎么做才對?
try {
String s1 = "00:00:00.221";
String s2 = "00:00:44.221";
SimpleDateFormat myformat = new SimpleDateFormat("hh:mm:ss.SSS", Locale.getDefault());
Date date = myformat.parse(s1);
Date date1 = myformat.parse(s2);
long value = date1.getTime() - date.getTime();
Calendar calendar = Calendar.getInstance();
calendar.setTimeZone(TimeZone.getTimeZone("UTC"));
calendar.setTime(new Date(value));
String g1 = String.valueOf(calendar.get(Calendar.HOUR));
String g2 = String.valueOf(calendar.get(Calendar.MINUTE));
String g3 = String.valueOf(calendar.get(Calendar.SECOND));
String g4 = String.valueOf(calendar.get(Calendar.MILLISECOND));
String res = g1 + ":" + g2 + ":" + g3 + "." + g4;
Toast.makeText(this, res, Toast.LENGTH_SHORT).show();
} catch (Exception e) {
e.printStackTrace();
}
您可以將時區設置為 UTC 格式,
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