使用 alarm manager 如何设置闹钟

我试着在星期一的时候设置一个闹铃，但是没起作用，如何在周一设置一个闹铃，并且只响一次呢？

if (chk_wednesday.isChecked()) {
                        weekday = 7 - calNow.get(Calendar.DAY_OF_WEEK);
                        calSet.add(Calendar.DATE, weekday);
                        forday(weekday);
                        }


public void forday(int week) {

                days = calNow.get(Calendar.DAY_OF_MONTH);
                month = calNow.get(Calendar.MONTH);
                year = calNow.get(Calendar.YEAR);

        calSet.set(Calendar.DAY_OF_WEEK, week);
        calSet.set(Calendar.HOUR_OF_DAY, hour);
        calSet.set(Calendar.MINUTE, minuts);
        calSet.set(Calendar.SECOND, 0);
        calSet.set(Calendar.MILLISECOND, 0);

        calSet.set(Calendar.DAY_OF_MONTH, days);
        calSet.set(Calendar.MONTH, month);
        calSet.set(Calendar.YEAR, year);

        if (calSet.compareTo(calNow) <= 0) {
            // Today Set time passed, count to tomorrow
            calSet.add(Calendar.DATE, 1);
        }
        Log.i("time1", "" + calSet.getTimeInMillis());
        alarmManager.set(AlarmManager.RTC_WAKEUP, calSet.getTimeInMillis(),
                pendingIntent);
    }

第二的的提示音要打开日历，菜单，设置，把提示音改掉就行