使用Alarmmanager开始在特定时间的服务 [英] Using Alarmmanager to start a service at specific time

问题描述

我寻觅了很多地方，但无法找到如何启动服务一个干净的顺序解释（或者如果多数民众赞成不可能的，那么一个活动）使用AlarmManager ??在每天的特定时间

我要注册几个这样报警器和触发它们应该导致服务启动。我将有一小片code在服务，可以执行，我可以良好的完成服务......

 日历CAL = Calendar.getInstance（）;
日历cur_cal = Calendar.getInstance（）;
cur_cal.setTimeInMillis（System.currentTimeMillis的（））;
日期日期=新的日期（cur_cal.get（Calendar.YEAR），cur_cal.get（Calendar.MONTH），cur_cal.get（Calendar.DATE），16，45）;
cal.setTime（日期）;
意向意图=新的意图（ProfileList.this，ActivateOnTime.class）;
intent.putExtra（PROFILE_ID，2）;
PendingIntent pintent = PendingIntent.getService（ProfileList.this，0，意向，0）;
AlarmManager报警=（AlarmManager）getSystemService（Context.ALARM_SERVICE）;
警报。设置（AlarmManager.RTC_WAKEUP，cal.getTimeInMillis（），pintent）;
的System.out.println（设定的报警！）;
 

我想这code激活警报在4.45 ...但它不发射服务......我一定要保持运行的进程？ M I做错什么???

还有一件事，我的服务获取的情况下完美地执行我用下面的code：

 长firstTime = SystemClock.elapsedRealtime（）;
alarm.setRepeating（AlarmManager.ELAPSED_REALTIME_WAKEUP，firstTime，30 * 1000，pintent）;
 

解决方案

喜的朋友， 大量的研发基准，并与Pentium10的问题，关于同一主题后，我设法得到它的工作。虽然我仍然无法理解为什么我刚才提到的问题，约会的概念和日历（非的GregorianCalendar）对象无法正常工作。

 日历cur_cal =新的GregorianCalendar（）;
cur_cal.setTimeInMillis（System.currentTimeMillis的（））; //设置当前时间和日期本日历

日历CAL =新的GregorianCalendar（）;
cal.add（Calendar.DAY_OF_YEAR，cur_cal.get（Calendar.DAY_OF_YEAR））;
cal.set（Calendar.HOUR_OF_DAY，18）;
cal.set（Calendar.MINUTE，32）;
cal.set（Calendar.SECOND，cur_cal.get（Calendar.SECOND））;
cal.set（Calendar.MILLISECOND，cur_cal.get（Calendar.MILLISECOND））;
cal.set（Calendar.DATE，cur_cal.get（Calendar.DATE））;
cal.set（Calendar.MONTH，cur_cal.get（Calendar.MONTH））;
意向意图=新的意图（ProfileList.this，IntentBroadcastedReceiver.class）;
PendingIntent pintent = PendingIntent.getService（ProfileList.this，0，意向，0）;
AlarmManager报警=（AlarmManager）getSystemService（Context.ALARM_SERVICE）;
alarm.setRepeating（AlarmManager.RTC_WAKEUP，cal.getTimeInMillis（），30 * 1000，pintent）;
 

I have searched a lot of places but couldnt find a clean sequential explanation of how to start a service (or if thats not possible then an activity) at a specific time daily using the AlarmManager??

I want to register several such alarms and triggering them should result in a service to be started. I'll be having a small piece of code in the service which can then execute and i can finish the service for good....

Calendar cal = Calendar.getInstance();
Calendar cur_cal = Calendar.getInstance();
cur_cal.setTimeInMillis(System.currentTimeMillis());
Date date = new Date(cur_cal.get(Calendar.YEAR), cur_cal.get(Calendar.MONTH), cur_cal.get(Calendar.DATE), 16, 45);
cal.setTime(date);
Intent intent = new Intent(ProfileList.this, ActivateOnTime.class);
intent.putExtra("profile_id", 2);
PendingIntent pintent = PendingIntent.getService(ProfileList.this, 0, intent, 0);
AlarmManager alarm = (AlarmManager)getSystemService(Context.ALARM_SERVICE);
alarm.set(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), pintent);
System.out.println("The alarm set!!");

i tried this code to activate the alarm at 4.45... but its not firing the service... do i have to keep the process running?? M i doing anything wrong???

One more thing, my service gets perfectly executed in case i use the following code:

long firstTime = SystemClock.elapsedRealtime();
alarm.setRepeating(AlarmManager.ELAPSED_REALTIME_WAKEUP, firstTime, 30*1000,pintent);

解决方案

HI friends, After a lot of researching and with reference from "Pentium10"'s question on the same topic i managed to get it working. Though i still cant understand why the "date" concept and the Calendar(non GregorianCalendar) object which i have mentioned in the question are not working correctly.

Calendar cur_cal = new GregorianCalendar();
cur_cal.setTimeInMillis(System.currentTimeMillis());//set the current time and date for this calendar

Calendar cal = new GregorianCalendar();
cal.add(Calendar.DAY_OF_YEAR, cur_cal.get(Calendar.DAY_OF_YEAR));
cal.set(Calendar.HOUR_OF_DAY, 18);
cal.set(Calendar.MINUTE, 32);
cal.set(Calendar.SECOND, cur_cal.get(Calendar.SECOND));
cal.set(Calendar.MILLISECOND, cur_cal.get(Calendar.MILLISECOND));
cal.set(Calendar.DATE, cur_cal.get(Calendar.DATE));
cal.set(Calendar.MONTH, cur_cal.get(Calendar.MONTH));
Intent intent = new Intent(ProfileList.this, IntentBroadcastedReceiver.class);
PendingIntent pintent = PendingIntent.getService(ProfileList.this, 0, intent, 0);
AlarmManager alarm = (AlarmManager)getSystemService(Context.ALARM_SERVICE);
alarm.setRepeating(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(), 30*1000, pintent);

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