Android app cannot connect to internet when try to run automate testing using TestDroid

Android app cannot connect to internet when try to run automate testing
using TestDroid

I'm trying to record my activity in Android application using TestDroid
Recorder.
My app need internet to run. And it run perfectly before I use TestDroid
Recorder. But I don't know why my app cannot connect to internet when I
try to record it.
Someone said that I must setting "Internet permission in your manifest"
But I don't know how to do that? Can someone tell me what should I do?
Or why my app suddenly cannot connect to internet when I want to record it
using TestDroid? thanks