Android Logcat is empty when debug with device in android studio

Question

When I try to debug using android device in android studio Logcat shows nothing. But when I use emulator LogCat shows all the messages. How should view the Logcat messages w

Answer 1

In Android Studio 2.x I used to have to restart to get it working but often switching back and forth between the applications works or running

adb kill-server; 
adb start-server;

to restart adb fixes many things as well.