32.12 Flutter App Creation
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To begin a new app simply make up a name for the app and ask
flutter to create a folder of the same name. The
folder will contain an initial skeleton version of an app, ready to
build and run. Here we create an app called button:
The skeleton and fully functional dart program is found in
lib/main.dart. The file pubspec.yaml holds general information
about the app (name, description, publish_to, and version), the
development environment, dependencies (including dev_dependencies
required just for development), and Flutter configurations. The actual
versions of packages used is recorded in pubspec.lock. The locked
version can be useful to ensure we have a stable and known working
version of the package, in case package updates lead to failure
amongst the packages, rather than our application.
Templates can be chosen as well, with app as the default
template. Notice with --org to specify just the domain, not the app
name as well, since the final app identifier will be
com.mydomain.appname.
Flutter apps can run on any one of multiple platforms. To check what you can target on your computer run the devices command:
If you are on a Windows desktop then you will see the windows device
listed and you can build and run the app:
If your Android device is connected to the computer then you can build, install, and run the app on the device with run:
For a Linux desktop:
See Section 32.51 for further details on building and running on a Linux desktop. See Section ?? to learn how to distribute your app.
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