在xda-developers上，mligor提供了两种解决方法（主要看是否需要LCD一直亮着）。
链接地址如下：http://forum.xda-developers.com/archive/index.php/t-379366.html
I have tried and using GPSID works great.
basically to keep GPS signal alive there are two possibilities (depends what you need):
1) in case that you want to keep LCD ON
- inform OS that you need always D0 state for GPD0: (SetPowerRequirement)
- inform OS that your application needs Unattended mode (PowerPolicyNotify)
- register for PowerState notifications (RequestPowerNotifications)
- call SystemIdleTimerReset() often enough that LCD will not go OFF and/or device to go to sleep.
in this case when user Press Power button, your will get notification that device is going in Unattended mode, and you have to keep device alive with SystemIdleTimerReset() and to prevent never going in Sleep mode.
in this case user will be able to "switch off" device, but your application will continue running. You can also optimize application that in Unattended mode, nothing is updated on the screen, and less CPU to use (to save a bit battery)
2) in case that you do not want to keep LCD On all the time
- inform OS that you need always D0 state for GPD0: (SetPowerRequirement)
- inform OS that your application needs Unattended mode (PowerPolicyNotify)
- register for PowerState notifications (RequestPowerNotifications)
- but DO NOT call SystemIdleTimerReset() unless device is in Unattended mode
when user press Power button or device automatically switch off LCD after timeout, you will get notification about it and THEN call SystemIdleTimerReset to keep device alive. When device is again in ON mode, SystemIdleTimerReset should not be called.
This will ensure your application to work transparent, and it is perfect for some kind of GPS logger etc...
由于我手头没有GPS设备，所以没法测试，希望楼主可以试试看。
施炯
