Event Log > scroll to
Android framework is detected > click
This should make the
Logcat visible with logs shown. Moreover,
Device File Exprorer should show up on the right panel.
Update April 2020: Cuong’s answer works better with Android Studio 3.6+
Flutter use Run tab to display logs in Android Studio. Switch from Logcat to Run and then you will see logs.
Go to Setting/Preferences -> Languages & Framework -> Flutter ->
Check or uncheck Replace the Run and Debug console with an experimental Flutter Loggin view