Android 獲取時間的幾個簡單接口

long time = System.currentTimeMillis();
final Calendar mCalendar = Calendar.getInstance();
mCalendar.setTimeInMillis(time);

int hour = mCalendar.get(Calendar.HOUR);
int apm = mCalendar.get(Calendar.AM_PM);
// apm=0 表示上午，apm=1表示下午。

boolean is24 = DateFormat.is24HourFormat(Context c);

    TimeZone tz = TimeZone.getDefault();
    String zone = t + getCurrentTimeZone(tz);

    private String getCurrentTimeZone(TimeZone timeZone) {
      return createGmtOffsetString(true, true, timeZone.getRawOffset());
    }


    private String createGmtOffsetString(boolean includeGmt,
        boolean includeMinuteSeparator, int offsetMillis) {
      int offsetMinutes = offsetMillis / 60000;
      char sign = '+';
      if (offsetMinutes < 0) {
        sign = '-';
        offsetMinutes = -offsetMinutes;
      }
      StringBuilder builder = new StringBuilder();
      builder.append(sign);
      appendNumber(builder, 2, offsetMinutes / 60);
      return builder.toString();
    }


    private void appendNumber(StringBuilder builder, int count, int value) {
      String string = Integer.toString(value);
      builder.append(string);
    }