Android Studio recognizes physical Device as Null?

Question

I\'ve been developing an Android Application for Android (SDK min version 14) and I have testing it normally with tablets such as Samsung Galaxy 2 and Nex

Answer 1

For ubuntu machine select the transfer option and device will detected in android studio as well as for debugging. Generally device is at charging state for windows but for ubuntu this is how it works.

Also many a times device is not detected , do the same thing again.