android - 每天在特定时间设置重复闹钟

Question

我尝试使用警报管理器在每天的特定时间运行警报。 我正在使用这段代码

Intent intent = new Intent(AlarmSettings.this, AlarmService.class);
                        intent.putExtra("i", i);
PendingIntent mAlarmSender = PendingIntent.getService(AlarmSettings.this, Id, intent, 0);

AlarmManager am = (AlarmManager)getSystemService(ALARM_SERVICE);

am.setRepeating(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(),Calendar.getInstance().getTimeInMillis()+(24*60*60*1000), mAlarmSender);}

问题出在 如果 cal.getTimeInMillis() 的值是过去的，警报会立即运行，我不知道为什么，当 cal.getTimeInMillis() 的值是 future 的时候，它会在它的时间正确运行。

我需要让它在每天的特定时间运行。

Answer 1

// every day at 9 am
Calendar calendar = Calendar.getInstance();

// if it's after or equal 9 am schedule for next day
if (Calendar.getInstance().get(Calendar.HOUR_OF_DAY) >= 9) {
    calendar.add(Calendar.DAY_OF_YEAR, 1); // add, not set!
}
calendar.set(Calendar.HOUR_OF_DAY, 9);
calendar.set(Calendar.MINUTE, 0);
calendar.set(Calendar.SECOND, 0);

AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);

alarmManager.setInexactRepeating(AlarmManager.RTC, calendar.getTimeInMillis(),
            AlarmManager.INTERVAL_DAY, pi);

// alarmManager.setRepeating(AlarmManager.RTC, calendar.getTimeInMillis(),
// AlarmManager.INTERVAL_DAY, pi);