I tried to develop app using Flutter(using Android studio IDE).Add flutter plugin & flutter SDK in studio and Everything is configured but emulator / real time device are not listed. Its shows error like "Unable to list devices: Unable to discover Android devices. Please run "flutter doctor" to diagnose potential issues"
configure flutter in terminal to detect Android SDK and Android Studio:
$ flutter config --android-sdk /path/to/android/sdk
$ flutter config --android-studio-dir /path/to/android/studio
then restart Android Studio/Intellij. source: https://github.com/flutter/flutter-intellij/issues/2113#issuecomment-383412308