Unable to attach debugger in Android Studio - localhost:8600 java.net.ConnectException

Question

I cannot attach the debugger in Android Studio while running debug on a phone.

I’m currently using a Samsung S4, running Android 4.4.4 (but have tried an S5, S6, S7, and

Answer 1

1.try cleaning project Build->clean project

2.do file->Invalidate/cache restart if above not helps you..

3.try to change the data cable you are using to connect your phone.

if nothing above helps, install Android wifi ADB plugin and try to do debug over wifi.