This article is a “draft” lesson of the upcoming series on Flutter mobile app development using Laravel API on the back-end. The prerequisite of this lesson is that you have already installed Android Studio and all the tools needed for Flutter, and you’re familiar with how to launch/run the application from there. In Android Studio, when you create a new Flutter project, it is created with the lib/main.dart file that contains the majority of the main features that you need to know for app development in Flutter.
So, your main application widget is likely to extend a Stateless widget, and inside you need to add a build() method, that will describe what’s inside that widget.
You can find the description for it in the official Flutter widget docs, but for now all you need to know is that it’s a widget from Material Design library (remember, the one that we included on the very first line).