The AVD Manager in Android Studio doesn\'t show my device but adb devices
does show it. Am I missing something obvious here?
There are many reasons why Android Studio doesn't see mobile phone.
One of them is a problem with ADB Interface driver. You can check it in your Device Manager:
If you don't have ADB Interface driver, then use this guide to install it for Intel chipset: Installing the Android Debug Bridge (ADB) USB Driver on a Windows Computer.
If you have other, but not Intel, then try to search for the driver on manufacture's web-site.
For Xiaomi phones, turn off MIUI optimization in the very bottom of Developers mode menu.