Current time

Les opérations autour de currentTimeMillis :

long currentTime = System.currentTimeMillis();
Log.d("AndroAuto_Mem_Heure ", currentTime + "");
//now add half an hour, 1 800 000 miliseconds = 30 minutes
long halfAnHourLater = currentTime + (30 * 60 * 1000); // 30 * 60 * 1000 //hh*mm*60*1000
Log.d("Heure +30' ", halfAnHourLater + "");

Pour récupérer l’heure et la date du jour :

/** Get the current date and time */
int nMin, nHeure, nDay, nMois, nAn;
Calendar cal = new GregorianCalendar();
nAn    = cal.get(Calendar.YEAR);
nMois  = cal.get(Calendar.MONTH)+1;
nDay   = cal.get(Calendar.DAY_OF_MONTH);
nHeure = cal.get(Calendar.HOUR_OF_DAY); //HOUR_OF_DAY
nMin   = cal.get(Calendar.MINUTE); //HOUR_OF_DAY
Log.d("Calendrier ",nHeure+":"+nMin+" "+nDay+"/"+nMois+"/"+nAn);

Et pour le mois :

As is clear by the many answers: the month starts with 0.

Here’s a tip: you should be using SimpleDateFormat to get the String-representation of the month:

Calendar rightNow = Calendar.getInstance();
java.text.SimpleDateFormat df1 = new java.text.SimpleDateFormat("MM");
java.text.SimpleDateFormat df2 = new java.text.SimpleDateFormat("MMM");
java.text.SimpleDateFormat df3 = new java.text.SimpleDateFormat("MMMM");
System.out.println(df1.format(rightNow.getTime()));
System.out.println(df2.format(rightNow.getTime()));
System.out.println(df3.format(rightNow.getTime()));

Output:

11
Nov
November

Note: the output may vary, it is Locale-specific.

Avec API>26 :

LocalDate.now()            // Returns a date-only `LocalDate` object for the current month of the JVM’s current default time zone.
         .getMonthValue()  // Returns 1-12 for January-December.

….

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