android wifi permission

I don't understand why i need to add WAKE_LOCK permission to the applicat开发者_StackOverflow社区ion manifest when I toggle wifi with setWifiEnabled... Any idea ?

Just a guess, but I'd imagine it's because wifi is pretty power hungry, and wake locks are Android's mechanism to help the system manage when apps are using power. From http://pdk.android.com/online-pdk/guide/power_management.html:

A locked wakelock, depending on its type, prevents the system from entering suspend or other low-power states.