How to get current date and time in Android?

Question

There are many questions like this on StackOverflow but no one has the answer I need. I have seen these 3 questions:

Get Value Of Day Month form Date Object in Android?
How to get month and day in android?
Get current time and date on Android

From these 3 questions I have learnt that to get date and time, we need to use Calendar. I have visited its documentation page but that is too hard to understand.

Now my question is I want to get current day i.e 12, current month i.e November, current year i.e 2014 and hour, minute, not seconds and AM or PM.

I only know till here:

Calendar c = Calendar.getInstance();

Now what should I do next?

Answer 1

You can customize the format you want using

DateFormat df = new SimpleDateFormat("dd MM yyyy, HH:mm");
String date = df.format(Calendar.getInstance().getTime());

Answer 2

    Calendar calander = Calendar.getInstance(); 
    cDay = calander.get(Calendar.DAY_OF_MONTH);
    cMonth = calander.get(Calendar.MONTH) + 1;
    cYear = calander.get(Calendar.YEAR);
    selectedMonth = "" + cMonth;
    selectedYear = "" + cYear;
    cHour = calander.get(Calendar.HOUR);
    cMinute = calander.get(Calendar.MINUTE);
    cSecond = calander.get(Calendar.SECOND);

Answer 3

Use SimpleDateFormat to get date and time in desired format :

Calendar c = Calendar.getInstance();
SimpleDateFormat sdf = new SimpleDateFormat("dd,MMMM,YYYY hh,mm,a");
String strDate = sdf.format(c.getTime());

Answer 4

    Calendar localCalendar = Calendar.getInstance(TimeZone.getDefault());
    Date currentTime = localCalendar.getTime();
    int currentDay = localCalendar.get(Calendar.DATE);
    int currentMonth = localCalendar.get(Calendar.MONTH) + 1;
    int currentYear = localCalendar.get(Calendar.YEAR);
    int currentDayOfWeek = localCalendar.get(Calendar.DAY_OF_WEEK);
    int currentDayOfMonth = localCalendar.get(Calendar.DAY_OF_MONTH);
    int CurrentDayOfYear = localCalendar.get(Calendar.DAY_OF_YEAR);

    System.out.println("Current Date and time details in local timezone");
    System.out.println("Current Date: " + currentTime);
    System.out.println("Current Day: " + currentDay);
    System.out.println("Current Month: " + currentMonth);
    System.out.println("Current Year: " + currentYear);
    System.out.println("Current Day of Week: " + currentDayOfWeek);
    System.out.println("Current Day of Month: " + currentDayOfMonth);
    System.out.println("Current Day of Year: " + CurrentDayOfYear);

Answer 5

tl;dr

I want to get current day i.e 12, current month i.e November, current year i.e 2014 and hour, minute, not seconds and AM or PM.

ZonedDateTime
.now( 
    ZoneId.of( "Pacific/Auckland" )    // Or "Asia/India", "Africa/Tunis", etc.
)
.format(
    DateTimeFormatter
    .ofPattern(
        "dd MMMM uuuu HH:mm" 
    )
    .withLocale( 
        Locale.CANADA_FRENCH           // Or `Locale.US`, or `new Locale( "en" , "IN" )` for English language with India culture.
    )
)

See this code run live at IdeOne.com.

28 septembre 2019 08:48

java.time

From these 3 questions I have learnt that to get date and time, we need to use Calendar.

Nope.

The Calendar class is terrible, along with Date & SimpleDateFormat and such. These classes were all supplanted years ago by the modern java.time classes defined in JSR 310.

Now my question is I want to get current day i.e 12, current month i.e November, current year i.e 2014 and hour, minute, not seconds and AM or PM.

Determining a date and time-of-day requires a time zone. For any given moment, the date varies around the globe by zone. For example, a few minutes after midnight in Paris France is a new day while still “yesterday” in Montréal Québec.

If no time zone is specified, the JVM implicitly applies its current default time zone. That default may change at any moment during runtime(!), so your results may vary. Better to specify your desired/expected time zone explicitly as an argument. If you want to depend on the JVM’s current default time zone, make your intention clear by calling ZoneId.systemDefault(). If critical, confirm the zone with your user.

Specify a proper time zone name in the format of Continent/Region, such as America/Montreal, Africa/Casablanca, or Pacific/Auckland. Never use the 2-4 letter abbreviation such as EST or IST as they are not true time zones, not standardized, and not even unique(!).

ZoneId z = ZoneId.of( "Asia/Kolkata" ) ;  

Capture the current moment as seen in the wall-clock time used by the people of a certain region (a time zone).

ZonedDateTime zdt = ZonedDateTime.now( z ) ;

If you do not care about the seconds or fractional-second, truncate.

ZonedDateTime zdt = ZonedDateTime.now( z ).truncatedTo( ChronoUnit.MINUTES ) ;

Generate a string in standard ISO 8601 format, wisely extended to append the name of the time zone in square brackets.

String output = zdt.toString() ;

2019-09-28T01:42+05:30[Asia/Kolkata]

Generate a string, automatically localized.

Locale locale = new Locale( "en" , "IN" ) ;  // English language, India culture.
DateTimeFormatter f = DateTimeFormatter.ofLocalizedDateTime( FormatStyle.LONG ).withLocale( locale ) ;
String output2 = zdt.format( f ) ;

28 September 2019 at 1:42:00 AM IST

See this code run live at IdeOne.com.

---

---

About java.time

The java.time framework is built into Java 8 and later. These classes supplant the troublesome old legacy date-time classes such as java.util.Date, Calendar, & SimpleDateFormat.

To learn more, see the Oracle Tutorial. And search Stack Overflow for many examples and explanations. Specification is JSR 310.

The Joda-Time project, now in maintenance mode, advises migration to the java.time classes.

You may exchange java.time objects directly with your database. Use a JDBC driver compliant with JDBC 4.2 or later. No need for strings, no need for java.sql.* classes.

Where to obtain the java.time classes?

• Java SE 8, Java SE 9, Java SE 10, Java SE 11, and later - Part of the standard Java API with a bundled implementation.
  • Java 9 adds some minor features and fixes.
• Java SE 6 and Java SE 7
  • Most of the java.time functionality is back-ported to Java 6 & 7 in ThreeTen-Backport.
• Android
  • Later versions of Android bundle implementations of the java.time classes.
  • For earlier Android (<26), the ThreeTenABP project adapts ThreeTen-Backport (mentioned above). See How to use ThreeTenABP….

Answer 6

public class XYZ extends Activity {

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    //setContentView(R.layout.main);

    Calendar c = Calendar.getInstance();
    System.out.println("Current time => "+c.getTime());

    SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    String formattedDate = df.format(c.getTime());
    // formattedDate have current date/time
    Toast.makeText(this, formattedDate, Toast.LENGTH_SHORT).show();


  // Now we display formattedDate value in TextView
    TextView txtView = new TextView(this);
    txtView.setText("Current Date and Time : "+formattedDate);
    txtView.setGravity(Gravity.CENTER);
    txtView.setTextSize(20);
    setContentView(txtView);
  }

 }


Calendar calander = Calendar.getInstance(); 
cDay = calander.get(Calendar.DAY_OF_MONTH);
cMonth = calander.get(Calendar.MONTH) + 1;
cYear = calander.get(Calendar.YEAR);
selectedMonth = "" + cMonth;
selectedYear = "" + cYear;
cHour = calander.get(Calendar.HOUR);
cMinute = calander.get(Calendar.MINUTE);
cSecond = calander.get(Calendar.SECOND);