com.android.ddmlib.AdbCommandRejectedException: device offline (Even when device is connected)

Question

After update of Android Studio to 2.1.2 I've been getting the following error too many times when i make a change.

com.android.ddmlib.AdbCommandRejectedException: device offline

Error while Installing APK

The problem is device was never connected and is not offline

If i unplug and re-plug the device it starts working fine again. This never happened in the previous version of AS.

Question: Is there a setting to be changed in AS for this to stop happening or it is a bug?

Answer 1

Invalidate your Studio cache, restart your device and pc will work. Sometimes the problem with port also, just try after changing the usb port of your pc also.

Answer 2

Re-enabling USB Debugging fixed the problem

Settings > Developer Options > Disable & Re-enable USB Debugging

Answer 3

You just need to restart ADB , no need to restart your PC or Phone

Try the below steps:

Go to the Android SDK platform-tools directory in the command prompt

Type adb kill-server
Then type adb start-server

Now try re-connecting ...

In my case I was debugging over wifi for a long time , then the ADB server needed to be refreshed to see the connected devices again

It Happened on Pixel device running Android 8.1.0 with Android Studio 3.0

Cheers!

Answer 4

Try Disabling and Re-Enabling * USB debugging. *

Under your developer option menu

This solved my issue.