问题
After upgrading Android Studio from 3.0 to 3.1, the Messages window seems to have disappeared, even though some build outputs (e.g. proguard) continue to refer to it. Where is it?
回答1:
After some poking around, I found this button on the left side of the Build window:
Clicking this button toggles the view between the new "Build" view and a text output version which resembles the old Messages view - although it isn't exactly the same.
I hope this helps!
UPDATE: In Android Studio 3.3 the button now looks like this:
回答2:
Can't find the button @yuval provided, but here it is to toggle to show it
回答3:
With Android Studio 3.3 Canary 8, go to "build":
And then on the left side click on this button :
And then you will see your build outputs. Enjoy
来源：https://stackoverflow.com/questions/49616379/where-is-the-messages-window-in-android-studio-3-1