How to simulate sleep mode on Android emulator

Question

Some users of my Android application report bugs when the mobile enters sleep/power saving mode.

I would like to test that issue on the Android Virtual Device. Is it

Answer 1

On emulator, go Settings/Security/Screen lock change from 'None' to 'Swipe'

Then, click 'power' button on right control bar to turn off screen, and press again to turn on screen. Now the lock screen will show up.