Android获取当前时间的3中方法总结

今天听了一在线公开课，任务是做一个数字时钟，其中最关键的自然是获取当前的系统时间。做个简单的记录，如下：

1.

Time time = new Time("GMT+8");
time.setToNow(); //Sets the time of the given Time object to the current time. 将事件获取对象置为当前时间

System.out.println(time.hour);
System.out.println(time.minute);
System.out.println(time.second);

2.

private SimpleDateFormat sdf = new SimpleDateFormat("HH:mm:ss");
String str = sdf.format(new Date());

3.

Calendar calendar = Calendar.getInstance();

int hour = calendar.HOUR_OF_DAY;
int minute = calendar.MINUTE;
int second = calendar.SECOND;