Android 获取时间的几个简单接口-优快云博客

android 获取时间判断是上午的还是下午

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。

判断系统当前时间的制式：

boolean is24 = DateFormat.is24HourFormat(Context c);

获取时区

        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);
        }

Android 根据系统时间设置显示上下午时间

        String time="";
        String strTimeFormat = android.provider.Settings.System.getString(cv, android.provider.Settings.System.TIME_12_24);
        if (("24".equals(strTimeFormat))) { // 24小时
            SimpleDateFormat sd = new SimpleDateFormat("HH:mm");
            time = sd.format(new Date());
        } else { // 12小时
            SimpleDateFormat sd = new SimpleDateFormat("a hh:mm");
            time = sd.format(new Date());
        }

参考链接：

http://blog.youkuaiyun.com/fengfeng444333/article/details/39964611

http://www.linuxidc.com/Linux/2012-03/55559.htm

http://blog.sina.com.cn/s/blog_3e333c4a0101c067.html