Android Question How come service can pause?

[dreamworld]

I got a strange error.
I started a service and let a timer to connect server from time to time. Before each connection, a notification would show. However, when the screen was off, the timer paused and no notifications any more. When the screen was on, the timer started to work again, pushing notifications.
This is really strange.
As far as I know, service can not pause, hence timers in a service will not pause too.

 

[dreamworld]

The timer did not raise tick event, when screen was off.
It was in a service, not an activity.
When screen was on, it resumed raising tick event. The screen was still locked.

 

[Erel]

When the device is sleeping the CPU is paused. This means that the whole process is paused. You can use PhoneWakeState to prevent it from sleeping.

 

[dreamworld]

but I can listen to music and radio when the screen is off. And I can receive sms.

 

[Erel]

The screen can be off and the device might still not sleep. If your timer stops immediately when the screen is off then there is a problem in your code.