Android DateFormat

Format the time:

SimpleDateFormat sDateFormat = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
String date = sDateFormat.format(new java.util.Date());

For Detail ,consult http://developer.android.com/reference/android/text/format/DateFormat.html

java.text.DateFormat

java.text.format.DateFormat

For the month of September:
M -> 9
MM -> 09
MMM -> Sep
MMMM -> September

For 7 minutes past the hour:
m -> 7
mm -> 07
mmm -> 007
mmmm -> 0007

Examples for April 6, 1970 at 3:23am:
"MM/dd/yy h:mmaa" -> "04/06/70 3:23am"
"MMM dd, yyyy h:mmaa" -> "Apr 6, 1970 3:23am"
"MMMM dd, yyyy h:mmaa" -> "April 6, 1970 3:23am"
"E, MMMM dd, yyyy h:mmaa" -> "Mon, April 6, 1970 3:23am&
"EEEE, MMMM dd, yyyy h:mmaa" -> "Monday, April 6, 1970 3:23am"
"'Noteworthy day: 'M/d/yy" -> "Noteworthy day: 4/6/70"

SimpleDateFormat For detail,consult http://developer.android.com/reference/java/text/SimpleDateFormat.html

Symbol	Meaning	Presentation	Example
D	day in year	(Number)	189
E	day of week	(Text)	Tuesday
F	day of week in month	(Number)	2 (2nd Wed in July)
G	era designator	(Text)	AD
H	hour in day (0-23)	(Number)	0
K	hour in am/pm (0-11)	(Number)	0
L	stand-alone month	(Text/Number)	July / 07
M	month in year	(Text/Number)	July / 07
S	fractional seconds	(Number)	978
W	week in month	(Number)	2
Z	time zone (RFC 822)	(Timezone)	-0800
a	am/pm marker	(Text)	PM
c	stand-alone day of week	(Text/Number)	Tuesday / 2
d	day in month	(Number)	10
h	hour in am/pm (1-12)	(Number)	12
k	hour in day (1-24)	(Number)	24
m	minute in hour	(Number)	30
s	second in minute	(Number)	55
w	week in year	(Number)	27
y	year	(Number)	2010
z	time zone	(Timezone)	Pacific Standard Time
'	escape for text	(Delimiter)	'Date='
''	single quote	(Literal)	'o''clock'

The number of consecutive copies (the "count") of a pattern character further influences the format.

Text if the count is 4 or more, use the full form; otherwise use a short or abbreviated form if one exists. So

zzzz

might give

Pacific Standard Time

whereas

z

might give

PST

. Note that the count does not specify the exact width of the field.

Number the count is the minimum number of digits. Shorter values are zero-padded to this width, longer values overflow this width.
Years are handled specially:

yy

truncates to the last 2 digits, but any other number of consecutive

y

s does not truncate. So where

yyyy

or

y

might give

2010

,

yy

would give

10

.

Fractional seconds are also handled specially: they're zero-padded on the right.

Text/Number: if the count is 3 or more, use text; otherwise use a number. So

MM

might give

07

while

MMM

gives

July

.

The two pattern characters

L

and

c

are ICU-compatible extensions, not available in the RI. These are necessary for correct localization in languages such as Russian that distinguish between, say, "June" and "June 2010".

yyyy-MM-dd 1970-01-01
yyyy-MM-dd HH:mm 1969-12-3116:00
yyyy-MM-dd HH:mm 1970-01-0100:00
yyyy-MM-dd HH:mmZ 1969-12-3116:00-0800
yyyy-MM-dd HH:mmZ 1970-01-0100:00+0000
yyyy-MM-dd HH:mm:ss.SSSZ 1969-12-3116:00:00.000-0800
yyyy-MM-dd HH:mm:ss.SSSZ 1970-01-0100:00:00.000+0000
yyyy-MM-dd'T'HH:mm:ss.SSSZ 1969-12-31T16:00:00.000-0800
yyyy-MM-dd'T'HH:mm:ss.SSSZ 1970-01-01T00:00:00.000+0000