UPDATE :
Read moreHow do I show preview in flutter?
Run the preview
Read moreHow do you inspect a flutter app?
To debug a layout issue, run the app in debug mode and open the inspector by clicking the Flutter Inspector tab on the DevTools toolbar . Note: You can still access the Flutter inspector directly from Android Studio/IntelliJ, but you might prefer the more spacious view when running it from DevTools in a browser.
Read moreHow do I get rid of Flutter inspector?
To remove the flutter debug banner, there are several possibilities : 1- The first one is to use the debugShowCheckModeBanner property in your MaterialApp widget . And then do a hot reload. 2-The second possibility is to hide debug mode banner in Flutter Inspector if you use Android Studio or IntelliJ IDEA .
Read moreHow do I enable Flutter inspector?
Launch DevTools from the toolbar/menu
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