10

Just recently I noticed on my Nexus 7 that when I start some apps - and it's not just those allows to have superuser rights - I can briefly see a "red frame" all around the screen area of the app that goes away in a second or maybe a little less.

Does anyone know where this comes from and in particular what it means?

Note: as you probably guessed from the contents, my device is rooted. Also note that it's well possible that one of the installed apps is responsible for this, yet I don;t know which. But I'd like to know.

3
  • 1
    That sounds vaguely like the developer options -- check to see if you've got those enabled.
    – offby1
    Nov 17 '12 at 2:02
  • @offby1: spot on. Please write it as an answer and I will accept it. Although I cannot tell which exact option caused this, disabling the developer options altogether fixed it. Thanks. Nov 17 '12 at 2:06
  • 1
    Xposed framework did this on my device. Disabling strict mode in developer options didnt work. Disabling Xposed framework worked.
    – Bolli
    Jan 27 '19 at 11:43
12

This is caused by the strict mode setting under the developer options. It flashes a red border around the screen when anything does a long operation on the main thread.

4

Happened with me also. Uncheck the strict mode setting and then reboot the device. Dont forget to reboot.otherwise the settings' change wont apply.

4
  • 1
    It's unnecessary to reboot the device. I've toggled this setting many times. It takes effect immediately. Mar 1 '13 at 7:53
  • 1
    It may be neccessary. On my Fairphone with Android 4.2.2 it was only disabled after a reboot.
    – cxxl
    Jan 22 '14 at 17:59
  • 1
    A reboot was necessary on my Samsung Note Pro.
    – Nick
    Mar 23 '15 at 22:54
  • 1
    @scott severance : On my phone(MI4i), a reboot was necessary for the setting change to take effect.
    – anotherDev
    Dec 28 '16 at 13:22

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.