Not able to connect adb after upgrate Android Studio to 3.4

Question

unable to connect to adb.check the event log for a possible issue, verify that localhost entry is pointing to 127.0.0.1 or:: 1 for ipv4 or ipv6

Answer 1

If you are using Genymotion, there is an update that fix the problem.

Genymotion 3.0.2 (April 18th, 2019)

Corrections

We have fixed an incompatibility with the adb tool bundled in the platform-tools 28.0.2 package of the Android SDK, which caused failures to start virtual devices.

This new version of adb changed the behavior of the “adb connect :” command by making the “port” part mandatory. This broke Genymotion Desktop in a few places where it did not pass the port. We have adjusted the way we call “adb connect” and also updated the version we ship with the product to match the one in platform-tools 28.0.2.