Is there a way to check if Android device screen is locked via adb?

Question

I know that PowerManager and/or KeyguardManager can help me check if a device screen is locked/unlocked. Is there a way to check this via adb?

Answer 1

This works only when device has NFC:

# returns one of: mScreenState=OFF|ON_LOCKED|ON_UNLOCKED
adb shell dumpsys nfc | grep 'mScreenState='

OFF - Screen off

ON_LOCKED - Screen displays locked screen

ON_UNLOCKED - device unlocked