How to lock Android screen via ADB?

Question

Is there a way to lock the Android screen via the ADB?

I find ways to lock the display in an apk, but I want to lock the screen from the PC via ADB, to simulate a displ

Answer 1

Here's the whole thing in one single bash script which checks if the screen is actually on or not and then wakes up and unlocks the screen in one shot:

if [ "$(adb shell dumpsys power | grep mScreenOn= | grep -oE '(true|false)')" == false ] ; then
    echo "Screen is off. Turning on."
    adb shell input keyevent 26 # wakeup
    adb shell input keyevent 82 # unlock
    echo "OK, should be on now."
else 
    echo "Screen is already on."
fi