我设置了AlarmManagr有重复时间。这里是我的方法,通过它,我将它设置:
I have set an AlarmManagr with a repeat time. Here is my method by which I am setting it:
public void setAlarmManager(Context context, Intent intent) {
PendingIntent pendingIntent;
pendingIntent = PendingIntent.getService(context, 0, intent, 0);
AlarmManager alarmManager =
(AlarmManager)context.getSystemService(context.ALARM_SERVICE);
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(System.currentTimeMillis());
calendar.add(Calendar.SECOND, 10);
alarmManager.setRepeating(AlarmManager.RTC_WAKEUP,
calendar.getTimeInMillis(),
40000, pendingIntent);
}
这工作正常,只是当我的设备进入睡眠模式的报警停止工作,直到我手动唤醒我的设备。唤醒设备后,AlarmManager重新开始工作。
This works fine except when my device goes into sleep mode the the alarm stops working until I awake my device manually. After waking the device the AlarmManager start working again.
如何保持管理器下运行,即使在睡眠模式?
How to keep the manager running even in sleep mode?
这是因为你的 PendingIntent
正在调用一个服务,而不是一个 BroadcastReceiver的
,这意味着该设备可以回去睡觉甚至创建了服务之前。如果你移动到一个广播接收器也应该保持清醒,直到的onReceive完成后的BroadcastReceiver,这意味着你将有时间得到wakelock,开始你的服务。即使你移动到一个的BroadcastReceiver
你将要收购wakelock,直到你完成你的处理,如果它要采取超过10秒(这是一个极限的BroadcastReceiver
)。
It is because your PendingIntent
is calling to a service and not to a BroadcastReceiver
which means the device can go back to sleep before your service is even created. If you move to a broadcast receiver it "should" stay awake until the onReceive is complete of the BroadcastReceiver which means you will have time to get a wakelock and start your service. Even if you move to a BroadcastReceiver
you will want to acquire a wakelock until you have completed your processing if it's going to take more than 10 seconds (which is the limit of a BroadcastReceiver
).
这是取自AlarmManager的Android的文件第2款:
This is taken from paragraph 2 of the android documentation of AlarmManager:
......如果你的报警接收机名为 Context.startService()
,有可能手机会睡的请求的服务推出之前,为prevent这一点,你的BroadcastReceiver和服务将需要实现一个单独的唤醒锁定策略,以确保该手机将继续运行,直到服务变得可用。
"... If your alarm receiver called Context.startService()
, it is possible that the phone will sleep before the requested service is launched. To prevent this, your BroadcastReceiver and Service will need to implement a separate wake lock policy to ensure that the phone continues running until the service becomes available."