The AVD Manager in Android Studio doesn\'t show my device but adb devices
does show it. Am I missing something obvious here?
In my case the following steps helped to resolve the issue:
1) Ensure the package "Google USB Driver" is installed in Android SDK Manager
2) Download "ADB Driver Installer 2.0" from here
3) Run the tool downloaded and connect your smartphone; in my case it showed that the driver had been installed incorrectly and suggested to fix it
After those steps my Android Studio instantly recognised the device! Both MTP and PTP started to work.
Tested for Samsung (Android 4.1.2) and Xiaomi MI4W (Android 4.4.4)