How to increase the width of the code line in Android studio?

FOR MAC OS:

Android Studio -> Preferences -> Editor -> Code Style -> Dart -> Line length: int

I solved this issue by changing Settings -> Editor -> Code Style -> Dart -> Line length to 150

I'm not sure how to change the settings, maybe with an Android Studio plugin, but as described in the Dart docs you should avoid lines with more than 80 characters of code. Try to structure your code a bit then you have more overview instead of squeezing everything in one method, widget or whatever together

Link to Dart docs

Go to settings -> Editor -> Code Style -> Dart, you can change line length to what ever value you want, but based on Effective dart style, it's better to avoid lines longer than 80 characters. see this docs https://dart.dev/guides/language/effective-dart/style