I have to activate android's system key lock (the one you get when you press the power off/*hang up* button). See here:
I already browsed the docs but everything I found was PowerManager and KeyguardManager. Both seem not to be the solution :-(.
So, does everyone know how to achieve that from a android application? (If special permissions are required, that is no problem but changing the device's settings is not a solution...)
EDIT: Or does someone know that this is definitely not possible at all? Btw. craigs solution with sending keys does not work anymore (see comments).
(Target platform: Android 2.1, older versions would be cool but not necessary)