Just starting out with Android development; have a Nexus 5 bought in Japan, but with English version of android (presumably shouldn\'t matter). I installed Android Studio on
I face Same problem. In my case i solved this by following some steps.
click attached debugger to android process (It located In android tools inside run button)
if see adb not responding error dialog. then click restart of dialogue button.
Now you can see which device is connected. now close this window.
again press run button. Now you find your targeted device or emulator which is connected.
Hopefully it helps you.