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I need to know in my script whether or not the device's screen is off. Is there any simple command to obtain such information using ADB?

tomrozb
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5 Answers5

14

dumpsys power | grep mScreenOn

Alex P.
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    Is this specific to some range of devices or Android specific? It works, but better is to grep for mScreenOn= (mScreenOn returns more than one entry in my case). – tomrozb Oct 26 '13 at 21:49
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    This command works on 4.2+ devices, use `dumpsys input_method | grep mScreenOn` for devices with a lower version. For more info see my answer to this post: http://stackoverflow.com/a/21419347/1345115 – Carlo B. Jan 29 '14 at 00:05
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    Just a note, dumpsys is a shell command, not an adb command. The cut and paste answer would be adb shell dumpsys power | grep mScreenOn – Bobbi Bennett Nov 14 '15 at 14:09
  • Doesn't work with me (Android 6). This only shows if the graphical data is on or off. If I connect with adb to the phone and turn the screen off, this still shows as the screen being on. – brunoais Jul 08 '20 at 19:55
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On 5.0 it looks like you have to grep the dumpsys power output for

Display Power: state=OFF

or

Display Power: state=ON
aschmied
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2

On Moto G5+, Moto X4, and Samsung Note 8 I'm seeing the following to work whereas dumpsys power did not (all devices are Marshmallow or later):

adb shell dumpsys deviceidle | grep mScreenOn

yields,

mScreenOn=false

when the screen is 'locked' whether blank or not, whereas,

adb shell dumpsys window | grep mScreenOn

yeilds,

mScreenOnEarly=false mScreenOnFully=false

only if the screen is not 'breathing' info such as the time.

Use dumpsys deviceidle to know if the screen needs to be unlocked to allow user interaction.

Pete Mueller
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2

This worked for me:

adb shell dumpsys display | grep mScreenState

Output:

mScreenState=OFF
Bryndox
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  • My Phone: XiaoMi 9
    • Android: 10

use adb to check screen status ON/OFF ?

method 1: use mHoldingDisplaySuspendBlocker

  • Command: adb shell dumpsys power | grep mHoldingDisplaySuspendBlocker
  • Output:
    • mHoldingDisplaySuspendBlocker=false -> Screen OFF
    • mHoldingDisplaySuspendBlocker=true -> Screen ON

method 2: use mWakefulness

  • Command: adb shell dumpsys power | grep mWakefulness=
  • Output:
    • mWakefulness=Dozing -> Screen OFF
    • mWakefulness=Awake -> Screen ON

method 3: use nfc (if android has NFC module)

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

method 4: use service call

  • Command: adb shell service call power 12
  • Output:
    • Result: Parcel(00000000 00000000 '........') -> 0 means Screen OFF
    • Result: Parcel(00000000 00000001 '........') -> 1 means Screen ON
crifan
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