1. Date and Time Classes 1.1 The Date Class Epoch Reference Point The epoch in computing begins at January 1, 1970, 00:00:00 UTC. All timestamps are calculated relative to this point. Time Conversion 1 second equals 1000 milliseconds. Date Class Overview The Date class represents a specific moment i...
Android provides multiple approaches for retrieving system time, including Calendar, Date, and currentTimeMillis methods. Calendar Approach The Calendar method requires obtaining an instance through Calendar.getInstance(), setting the timezone (China uses GMT+8:00), and then using Calendar.get() to...
Using the Legacy Date Class The Date object represents a specific instent in time with millisecond precision. Note that many methods in this class are deprecated in favor of Calendar. getTime(): Returns the number of milliseconds since January 1, 1970, 00:00:00 GMT. getYear(): Returns the year minus...