Android ADB devices unauthorized

Question

Configuration    Windows 8 1 ADB version  1 0 32 Smartphone  Oneplus One   Problem  I installed the Samsung drivers as it is said to do  When I run the ADB devices command  it said unauthorized   Already tried    I ve done everything that d been said on this post  https   stackoverflow com a 25546300 1848376  But the problem is that I don t get a prompt on the phone to tell me I must accept the connection  When I run the command adb shell  here is the answer   error  device unauthorized  This adbd s  ADB VENDOR KEYS is not set  try  adb kill-server  if that seems wrong  Otherwise check for a confirmation dialog on your device     I did  adb kill-server   but it didn t change anything  Why

User · Answer

Delete existing adbkeys   OR  Rename adbkeys  Best practise is to rename the keys because it provides backup   cd    Android  mv adbkey adbkey2  mv adbkey pub adbkey pub2  Next stop  amp  start the server  cd   Android Sdk platform-tools  Locate the device   Android Sdk platform-tools    adb devices   Android Sdk platform-tools    adb kill-server   Android Sdk platform-tools    adb start-server  Then  stop the emulator Open AVD manager  click on the down arrow  then click on wipe data   Restart the emulator  Then everything works fine

User · Answer

I suppose you have enabled On-device Developer Options in your smartphone  If not you can take a look at the steps provided by Android  http   developer android com tools device html developer-device-options

User · Answer

All you need is to authorize debug mode  1  make sure your Device is connected to your PC   2  Allow authorized for debug mode via Android-Studio by going to   Run -  Attach debugger to Android process  than you will see the pop up window for allow debug mode in your Device  press OK  done  i hope it help to someone

User · Answer

Thankgod xda developers exist   http   forum xda-developers com verizon-lg-g3 help unable-to-access-adb-t2830087  Just had to delete adbkey file in C Users  Name  android adbkey pub was missing   Restart after this and both files are there   If this does not work    - Try Revoke USB DEBUGGING Authorization  - Enable USB debugging again

User · Answer

for anyone encountering this later this may also help   I encountered this exact issue trying to use adb from a user command prompt and the answers above did not help  but the problem went away with an  adb kill-server  when running in an administrator command prompt

User · Answer

in Developer options     Enable USB debugging       Give a authorization       if there is no a Developer option menu  you have to click 3 times build number of Phone State menu to be developer  you can sse a developer option menu

User · Answer

Try deleting the adbkey file from C  android folder   and then run the commands as  mentioned above i e       adb kill-server  adb start-server and adb devices

User · Answer

This worked for me   rm    android adbkey pub  sudo   adb kill-server  sudo   adb start-server  sudo   adb -s emulator-5554 install   apk to install apk  I m not sure if is a good idea run adb with sudo privileges but it was the only way I get it works  Regards

User · Answer

Ensure that you have accepted the pressed the  ok  button when it is asking it is showing the fingerprint of the device after connecting through usb to your PC

User · Answer

None of the methods listed on this page worked for me  specifically    I had an issue where the Settings app would crash when selecting Revoke USB debugging authorizations I was running LineageOS 14 x86 64 I was using ADB over network The  data misc adb contained no adb keys file Removing my local    android adbkey did not help either I had root access from the local terminal I was not getting any confirmation dialog   adb  error  failed to get feature set  device unauthorized  This adb server s  ADB VENDOR KEYS is not set Try  adb kill-server  if that seems wrong  Otherwise check for a confirmation dialog on your device  - waiting for device -   In the end  I found a very useful post here that suggested to manually put the contents of    android adbkey pub inside the  data misc adb adb keys file   They suggested one of these two methods    From another working device  copy the adb keys file into your computer       On the other Android device cp  data misc adb adb keys  sdcard     From your computer adb pull  sdcard adb keys     Then put the working adb keys file into the problematic Android device s sdcard  using Web or MTP  named as adb keys  then copy the file into the correct path     On the problematic device cp  sdcard adb keys  data misc adb adb keys  The other method is to simply copy your machine s adbkey pub from the    android  directory  and put it into the problematic Android device s sdcard  using Web or MTP  named as adb keys  then copy the file into the correct path     On the problematic device cp  sdcard adbkey pub  data misc adb adb keys    Note  there s a similar answer on SO that goes into further details for this method     Since I was running a web server on my computer  and I had curl installed on Android  I su ed from the terminal and ran the following on my Android device   cd  data misc adb curl 192 168 1 35 8080 adbkey pub  gt  adb keys   Killed the adb daemon  using adb kill-server  and BAM  The adb shell worked fine  like it should have been from the beginning   Hopefully  the method described here works for you as it did for me

User · Answer

Try this uncheck the  verify apps via USB  in developer options and then turn on and off the  USB Debugging   It works with me

User · Answer

First Remove the adbkey and adbkey pub from the  android directory in your Home directory  Make  android directory in your home with 710 permissions    chmod 710  android  and ownership as  chown -R  lt user gt   lt user gt   android   Ex     chmod 710  android    chown -R ashan ashan  android   Go to developer options in your mobile and tap option Revoke USB debugging authorizations Turn off all USB Debugging and Developer Options in the device and disconnect the device from your machine  Connect the device again and at first turn on the Developer Options  Then Turn on the USB debugging   At this point in your mobile  you will get a prompt for asking permission from you  Note  you must check the checkbox always accept from this      option and click ok  Now in you machine  start the adb server  adb start-server  Hopefully when you issue the command  adb devices now  you will see your device ready authorized

User · Answer

For FIRE STICK 4K it actually says in the dialog  Otherwise check for a confirmation dialog on your device Indeed on the TV in the other room there was a confirmation dialog  Doh

User · Answer

In sequence       adb kill-server    in your DEVICE SETUP  go to developer-options end disable usb-debugging press REVOKE USB debugging authorizations  click OK enable usb-debugging  adb start-server

User · Answer

Your app is being detected as some harmful program  Turn off  Verify apps over USB  option  It s in the same view as  USB debugging

User · Answer

I had the same problem after reinstalled my android studio  Here s what I did to make my adb work again   -path to C  Users User AppData Local Android sdk platform-tools -Shift r click and start command from here instead

User · Answer

This worked for me 1- Go to    android  and remove    adbkey    2- Disconnect USB connection 3- adb kill-server 4- Revoke USB debugging authorizations  in developer option  5- Reconnect the device to the Ma 6- adb devices

User · Answer

I got this as root when as a non-root user I was getting permissions errors trying to connect to custom recovery  Philz   so I killed adb server  copied the  android subdirectory of my user account into  root  chowned -R to root root  and restarted adb server  I m in

User · Answer

In Android studio  Run menu  gt  Run shows OFFLINE     for the connected device   Below is the procedure followed to solve it     Read the below note first  Delete the    android adbkey  or  rename to    android adbkey2  this is even better incase you want it back for some reason  Note  I happened to do this step  but it didn t solve the problem  after doing all the below steps it worked  so unsure if this step is required  Run locate platform-tools adb Note  use the path that comes from here in below commands Kill adb server  sudo   Android Sdk platform-tools adb kill-server You will get a Allow accept   message popup on your device  Accept it  This is important  which solves the problem  Start adb server  sudo   Android Sdk platform-tools adb start-server In Android studio  do Run menu  gt  Run again It will show something like Samsung      your phone manufacture name   Also installs the apk on device correctly this time without error    Hope that helps

User · Answer

I removed the following files from the    android folder    adbkey adbkey pub   I disabled and enabled ADB within device and now it works

User · Answer

I had this problem and it wasnt solved by the deleting of any keys  at least deleting them didnt fix it  maybe had an effect after i did fix it though   I actually had a discrepancy between my sdk-tools version and my Android Studio version  After updating my tools it still didnt work  but after updating AS  to 1 4  everything worked fine again   Always update both sdk-tools and AS version together

User · Answer

Try Revoke USB DEBUGGING Authorization  Enable USB debugging again    It worked

User · Answer

I was hit by this problem  too  I m using my custom build of AOSP on Nexus 5X  I ve added a single line in build core main mk   diff --git a core main mk b core main mk index a6f829ab6  555657539 100644 --- a core main mk     b core main mk    -362 6  362 8    else    enable target debugging    ADDITIONAL DEFAULT PROPERTIES    ro debuggable 0  endif    enable target debugging   ADDITIONAL DEFAULT PROPERTIES    ro adb secure 1       eng      ifeq    TARGET BUILD VARIANT  eng    Now adb shell works fine  Those materials are useful  Chinese articles   http   www voidcn com blog kc58236582 article p-6335996 html  http   blog csdn net fanmengke im article details 28389439

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