How do I press power key on a bluetooth keyboard? How do I lock my Android device using the bluetooth keyboard?
How do I call up "Reboot, Airplane mode, etc." menu from keyboard?
Can I issue a forced poweroff from bluetooth keyboard, like when holding the power key?
Is your Android rooted? Has it got a button designed for that purpose? If your Android is rooted then you would have to manually install a app (Search google for something like 'Bluetooth Android Keyboard Power Options') and if your device is not rooted then it is nearly impossible to give a Shut Down command from even a app, though I could be wrong