java - Detecting a shake when Android is asleep and locked with service -

i want wake android device locked , asleep state single state.

what should use?

a wake lock keep service running , listening shake.

or possible same thing flags service?

will service receive if android device locked , asleep, if don't have wake lock?

update: wake lock ideal or unnecessary?

you can write service runs on background , listens event(shake)

as per flag can lock , unlock screen

//get window context   windowmanager wm = context.getsystemservice(context.window_service);       //unlock      //http://developer.android.com/reference/android/app/activity.html#getwindow()  window window = getwindow();       window.addflags(wm.layoutparams.flag_dismiss_keyguard);          //lock device     devicepolicymanager mdpm;    mdpm = (devicepolicymanager)getsystemservice(context.device_policy_service);