Good or Bad: Declaring main method async in Dart / Flutter

Question

I declare one global variable in the entire app - SharedPreferences prefs, and initialize it in main method.

However, SharedPreferences

Answer 1

Good one from @jamesdlin .

A literal answer for your question

How does main method gets invoked and how it works in general in Dart / Flutter?

For Android apps, Dart entry point is invoked via DartExecutor. You can take a look at here: DartExecutor class

There is a brief document, how you can manually do what FlutterApplication does for you: wiki/Experimental:-Launch-Flutter-with-non-main-entrypoint

Classes you want to look for, if you want to dig deeper: FlutterApplication, FlutterActivity, FlutterMain .