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

If you have Mi Device than you need to enable this two option after enabling Developer Mode.

1. USB Debugging (Enable = True)
2. Install via USB (Enable = True)

See this screenshot.