AlarmUtils.java 文件源码

@RequiresApi(api = Build.VERSION_CODES.N)
public static void setAlarm(Context context,int hour, int minute, int second) {
    Calendar calendar = Calendar.getInstance();
    Calendar rightNow = Calendar.getInstance();
    calendar.set(Calendar.HOUR, hour);
    int timeOffset = hour - calendar.get(Calendar.HOUR);
    calendar.setTimeInMillis(System.currentTimeMillis());
    calendar.set(Calendar.HOUR, hour - timeOffset);
    calendar.set(Calendar.MINUTE, minute);
    calendar.set(Calendar.SECOND, second);

    Intent intent = new Intent(context, AlarmReceiver.class);
    pendingIntent = PendingIntent.getBroadcast(context, 0, intent, 0);
    alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);

    //set the alarm repeat one day
    alarmManager.setInexactRepeating(AlarmManager.RTC_WAKEUP,
            calendar.getTimeInMillis(), AlarmManager.INTERVAL_DAY, pendingIntent);
    Log.i("setting", String.valueOf(calendar.getTime()));
    Log.i("actual", String.valueOf(rightNow.getTime()));
}