Android Alarm

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1> 用户添加闹钟后，是什么时候开始检查的？怎么检查的？

When:Trigger the check in 5s from now.

//接受者

CalendarProvider2

case REMINDERS:

{

id = mDbHelper.remindersInsert(values);

// Trigger the check in 5s from now
long triggerAtTime = SystemClock.elapsedRealtime() + ALARM_CHECK_DELAY_MILLIS;
set(AlarmManager.ELAPSED_REALTIME_WAKEUP, triggerAtTime, pending);

Intent intent = new Intent(ACTION_CHECK_NEXT_ALARM);

// ..................

mAlarmManager.set(type, triggerAtTime, operation); //设置闹钟，给定触发时间。

}

//接受者
CalendarProviderBroadcastReceiver {

onReceive {

//com.android.providers.calendar.intent.CalendarProvider2

context.startService(CalendarProviderIntentService);

}

//处理者

CalendarProviderIntentService {

onHandleIntent ->CalendarAlarmManager.runScheduleNextAlarm

->CalendarAlarmManager.scheduleNextAlarmLocked

-> CalendarContract.CalendarAlerts.scheduleAlarm(mContext, mAlarmManager, alarmTime);

-> scheduleNextAlarmCheck(nextAlarmTime + DateUtils.MINUTE_IN_MILLIS);

}

请求者。

CalendarAlarmManager

{

-> Intent intent = new Intent(CalendarReceiver.SCHEDULE);

}

//接受者

CalendarReceiver {

onReceive {

//com.android.providers.calendar.SCHEDULE_ALARM

//处理者

ExecutorService.submit-> cr.update(CalendarAlarmManager.SCHEDULE_ALARM_URI, null /* values */, null /* where */, null /* selectionArgs */);

}

2>闹钟是什么时候开始唤醒的？怎么唤醒的？

a->action android:name="android.intent.action.BOOT_COMPLETED"

->AlertReceiver

->context.startService(AlertService);

b)->AlertService ->processMessage->InitAlarmsService->onHandleIntent->

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