指定した時刻ではなく、すぐにアラームが鳴るのはなぜですか?
Intent myIntent = new Intent(Notepad.this, MyAlarmService.class);
PendingIntent pendingIntent = PendingIntent.getService(Notepad.this, 0, myIntent, 0);
AlarmManager alarmManager = (AlarmManager)getSystemService(ALARM_SERVICE);
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(System.currentTimeMillis());
calendar.set(Calendar.YEAR, 2012);
calendar.set(Calendar.MONTH, 4);
calendar.set(Calendar.DAY_OF_MONTH, 5);
calendar.set(Calendar.HOUR_OF_DAY, 10);
calendar.set(Calendar.MINUTE, 30);
calendar.set(Calendar.SECOND, 4);
alarmManager.set(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), pendingIntent);
のみを使用するcalendar.add(Calendar.SECOND, 5);
と、5 秒後に作動します。
ニコラスの答えに基づくソリューション
Date dat = new Date();//initializes to now
Calendar cal_alarm = Calendar.getInstance();
Calendar cal_now = Calendar.getInstance();
cal_now.setTime(dat);
cal_alarm.setTime(dat);
cal_alarm.set(Calendar.HOUR_OF_DAY,Integer.valueOf(h));
cal_alarm.set(Calendar.MINUTE, Integer.valueOf(m));
cal_alarm.set(Calendar.SECOND,0);
if(cal_alarm.before(cal_now)){
cal_alarm.add(Calendar.DATE,1);
}