Android Studio doesn't recognize my device

Question

Here is the problem. I want to run my Android Studio apps on my device (Samsung Galaxy Ace 2). But nothing works for me. Tell me what I\'ve missed:

1) USB debugging

Answer 1

I had the same problem. So here is what i did

1. reinstalled the device driver
2. changed the USB computer connection from MTP to Mass storage(UMS)

And it worked.