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I noticed that my phone silently enables bluetooth when screen turns off. When phones remains inactive for few minutes and I click unlock button I can see bluetooth indicator showing up for around 1-2 seconds, then it disappears and Bluetooth is disabled. I have suspicions that some app enables bluetooth programatically when screen is off.

Can I revoke bluetooth permissions from all apps? (eg. using adb) Or at least check recent bluetooth activity events?

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Run the following commands:

adb shell
for package in $(pm list packages -3 | cut -f2 -d":"); do pm revoke $package android.permission.BLUETOOTH; pm revoke $package android.permission.BLUETOOTH_ADMIN; done

That will list every installed third party application then revoke both permissions android.permission.BLUETOOTH and android.permission.BLUETOOTH_ADMIN.

If you need to apply this to all installed and enabled applications, use -e instead of -3.

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You can go to System settings⋙Apps, then click on the 3-dots ⋮ icon at the right-top corner of the title bar. Then, click on Reset app preferences, then click on OK.

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  • There's no explicit Bluetooth permission in Android permissions settings - how could this operation help?
    – Lapsio
    Apr 14 '19 at 20:51
  • Yes, that is true, but the operation can revoke all permissions from all apps. You can give it a try.
    – Puspam
    Apr 15 '19 at 5:53

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