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What Are Widgets? Widgets are user interface components within a Flutter application. You may think that you write code that renders the widget on the screen but you dont. When you write the code for a widget, you don't write the code that directly renders it. You write the configuration for the rendering of the widget in the 'build' method of the widget. In that method you create and return a widget object that configures what you want rendered on the screen.  Flutter itself takes care of the rendering itself, as well as other things like change detection. Build Method...

Introduction In Dart, you don’t have to develop everything from scratch. There is a packaging system where developers can develop packages and publish them. Other people can then use these packages. Website When someone writes a package and it is published to the https://pub.dartlang.org/ site, developers can declare a dependency to that project and pull it into their project as a dependency. Then the user can add imports at the top the files to import code and use it. Note that Dart and Flutter packages follow semantic versioning rules. Core Packages Flutter comes with many packages by default. These are...

Introduction This is a very short chapter, but it contains valuable information that you will use all the time. When are running a Flutter app and you make code changes, you can tell your editor to reload them. That is the subject of this chapter. Hot Reloads In fact, one of the great things about Dart is its ability to hot reload code. The Official Documentation Says: Flutter’s hot reload feature helps you quickly and easily experiment, build UIs, add features, and fix bugs. Hot reload works by injecting updated source code files into the running Dart Virtual Machine (VM)....

Introduction You can create a Flutter project from your IDE or from the command line. The default project displays a counter. You can increment the counter by hitting the floating &quote;+&quote; button on the bottom right. Lets create this Flutter project and take a review of the folders and files that are created for you. Install Your Editor For me, its between Android Studio (heavy but comprehensive) and Visual Studio code (lighter weight). Flutter SDK Download the Flutter SDK and unzip it into a folder. Add that folder plus 'bin' to your path in your shell script. For example on...

Here is a list of the Flutter SDK commands: flutter --help Lists flutter commands. flutter analyze Analyze the project's Dart code. flutter attach Attach to a running application. flutter bash-completion Output command line shell completion setup scripts. flutter build Flutter build commands. flutter channel List or switch flutter channels. flutter clean Delete the build/ and .dart_tool/ directories. flutter config Configure Flutter settings. flutter create Create a new Flutter project. flutter devices List all connected devices. flutter doctor Show information about the installed tooling. flutter drive Runs Flutter Driver tests for the current project. flutter emulators List, launch and create emulators....