We have installed flutter and set up an environment for both iOS and Android. Let
us now move ahead in the tutorial. But before that, we will run “flutter doctor”
command in the terminal to check whether everything is appropriately set up or
Doctor has found 2 issues in this category. Xcode is not updated here and there is
no external device connected to flutter as of now.
Starting with Flutter Basics:
When creating new flutter applications, there are some folders and files already
made. Let me give you a quick overview of what these folders and files do.
This file basically is responsible for generating the android part of the application. It
is a super important file. It is used to merge apps to flutter with the help of the
android studio. We do not work on this file a lot, only when we need to implement
something specifically to the android platform.
This file is also essential, especially for those who are developing cross platform
apps. This file is responsible for the iOS platform, and flutter uses Xcode to merge
that app to flutter.
This folder is responsible for everything in your flutter app. 99% of the work will be
done in this folder only. It contains the main. dart file, which is where our app’s
main code lines will be written. This is where we will make different files for
different work as well. This folder is the heart and soul of our flutter application.
The test folder is another crucial folder for our flutter applications. It will not be
used to create an app, but it will do something even more critical. It will be used
for testing the final output of applications.
Every flutter app will have this file by default. This file contains packages,
dependencies and other metadata that our app is using in the background. This
file is super important but, at the same time, super sensitive. It has some rules for
syntax, which needs to be followed precisely for error free app code (we will
discuss that later in detail).