How to fix: Androids ADB devices are offline or empty list
The Problem is that adb devices shows an empty list or shows devices that are offline.
There are two checklists that will – or might be – help to fix the problem.
- Checklist Your Device:
(a.) Make sure that your USB debugging option is activated in the Developer options.
(b.) Make sure the usb cable that you use is not defective.
(c.) (optionally) go to [ Settings -> Storage -> Menu -> USB computer connection] (path can be different on your device) and deactivate MTP and PTP.
(d.) restart your phone.
- Checklist Your PC / MAC:
(a.) make sure your adb is up to date. (type: adb version and check in the internet if its the newest version) if not download the newest android sdk.
(b.) type: adb kill-server (wait a sec) adb start-server
(c.) (MAC only) if you connect the device and a “Connection BlaBla Window” pops up try this command: sudo kextunload /System/Library/Extensions/EasyTetherUSBEthernet.kext
(d.) type: adb devices
- (Optional) If you use Eclipse:
(a.) Help –> Check for Updates (best you update all)
(b.) Open the Android SDK Manager and update all