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

Summry other (@Vouskopes, etc) answer here:

• My Phone: XiaoMi 9
  • Android: 10

use adb to check status of screen locked

method 1: (universal) use mDreamingLockscreen

• Command: adb shell dumpsys window | grep mDreamingLockscreen
• Output:
  • mShowingDream=false mDreamingLockscreen=true mDreamingSleepToken=null -> Screen Locked
    • no matter Screen is ON or OFF
  • mShowingDream=false mDreamingLockscreen=false mDreamingSleepToken=null -> Scrren Unlocked

method 2: use nfc (if android has NFC module)

• Command: adb shell dumpsys nfc | grep 'mScreenState='
• Output:
  • mScreenState=OFF_LOCKED -> Screen OFF and Locked
  • mScreenState=ON_LOCKED -> Screen ON and Locked
  • mScreenState=ON_UNLOCKED -> Screen ON and Unlocked