book

Flutter Cookbook - Second Edition

Name: Flutter Cookbook - Second Edition
Author: Simone Alessandria
ISBN: 9781803245430

by Simone Alessandria

May 2023

Intermediate to advanced

712 pages

13h 42m

English

Packt Publishing

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Preface
Who this book is forWhat this book coversTo get the most out of this bookGet in touch
Getting Started with Flutter
Why Flutter?Technical requirementsInstalling Flutter: a high-level overviewInstalling the Flutter SDKHow to use Git to manage the Flutter SDKInstalling Git How to do it...Setting up the command line and saving path variablesmacOS command-line setupWindows command-line setupLinux command-line setupConfirming your environment is correct with Flutter DoctorConfiguring the iOS SDKDownloading XcodeCocoaPodsXcode command-line toolsHomebrewChecking in with the DoctorConfiguring the Android SDK setupInstalling Android StudioCreating an Android emulatorWhich IDE/editor should you choose?Android StudioVS CodeIntelliJ IDEAEmacsPicking the right channelSummary
Creating Your First Flutter App
How to create a Flutter appHow to do it...How to choose a platform language for your appWhere do you place your code?Hot reload—refresh your app without recompilingCreating a unit test Getting ready How to do it... How it works... See also Summary
Dart: A Language You Already Know
Technical requirementsDeclaring variables—var versus final versus constGetting readyHow to do it...How it works...There’s more...See alsoStrings and string interpolationGetting readyHow to do it...How it works...There’s more...See alsoHow to write functionsGetting readyHow to do it...How it works...How to use functions as variables with closuresGetting readyHow to do it...How it works...Using Switch Expressions, Records and PatternsGetting readyHow to do it...How it works…There’s more...Creating classes and using the class constructor shorthandGetting readyHow to do it...How it works...The building blocks of OOPSee alsoHow to group and manipulate data with collectionsGetting readyHow to do it...How it works...Subscript syntaxThere’s more...See alsoWriting less code with higher-order functionsGetting readyHow to do it...How it works...MappingSortingFilteringReducingFlatteningThere’s more...First-class functionsIterables and chaining higher-order functionsSee alsoHow to take advantage of the cascade operatorGetting readyHow to do it...How it works...See alsoUsing extensionsGetting readyHow to do it...How it works...Introducing Dart Null SafetyGetting readyHow to do it...How it works...See alsoUsing Null Safety in classesGetting readyHow to do it...How it works...See alsoSummary
Introduction to Widgets
Technical requirementsCreating immutable widgetsHow to do it...How it works...Using a ScaffoldGetting readyHow to do it...How it works...Using the Container widgetGetting readyHow to do it...How it works...Printing stylish text on the screenGetting readyHow to do it...How it works...There’s more...See alsoImporting fonts and images into your appGetting readyHow to do it...How it works...See alsoSummary
Mastering Layout and Taming the Widget Tree
Placing widgets one after anotherGetting readyHow to do it...How it works...Proportional spacing with the Flexible and Expanded widgetsGetting readyHow to do it...How it works...See alsoDrawing shapes with CustomPaintGetting readyHow to do it...How it works...There’s more...See alsoNesting complex widget treesGetting readyHow to do it...How it works...See alsoRefactoring widget trees to improve legibilityGetting readyHow to do it...How it works...See alsoApplying global themesGetting readyHow to do it...How it works...There’s more...See alsoSummary
Adding Interactivity and Navigation to Your App
Adding state to your appGetting readyHow to do it...How it works...There’s more...See alsoInteracting with buttonsGetting readyHow to do it...How it works...Making it scrollGetting readyHow to do it...How it works...There’s more...Handling large datasets with list buildersHow to do it...How it works...There’s more...Working with TextFieldsGetting readyHow to do it...How it works...See alsoNavigating to the next screenHow to do it...How it works...Showing dialogs on the screenGetting readyHow to do it...How it works...There’s more...Presenting bottom sheetsGetting readyHow to do it...How it works...See alsoSummary
Basic State Management
Technical requirementsModel-view separationGetting readyHow to do it...How it works...See alsoManaging the data layer with InheritedWidget and InheritedNotifierGetting readyHow to do it...How it works...See alsoMaking the app state visible across multiple screensGetting readyHow to do it...How it works...See alsoSummary
The Future is Now: Introduction to Asynchronous Programming
Technical requirementsUsing a FutureGetting readyHow to do it...How it works...See alsoUsing async/await to avoid callbacksGetting readyHow to do it...How it works...See alsoCompleting FuturesGetting readyHow to do it...How it works...There’s more...See alsoFiring multiple Futures at the same timeGetting readyHow to do it...How it works...Resolving errors in asynchronous codeGetting readyHow to do it...Dealing with errors using the then() callback:Dealing with errors using async/awaitHow it works...See alsoUsing Futures with StatefulWidgetsGetting readyHow to do it...How it works...There’s more...See alsoUsing the FutureBuilder to let Flutter manage your FuturesGetting readyHow to do it...How it works...There’s more...See alsoTurning navigation routes into asynchronous functionsGetting readyHow to do it...How it works...Getting the results from a dialog Getting readyHow to do it...How it works...See alsoSummary
Data Persistence and Communicating with the Internet
Technical requirementsConverting Dart models into JSONGetting readyHow to do it...How it works...Reading the JSON fileTransforming the JSON string into a list of Map objectsTransforming the Map objects into Pizza objectsThere’s more...See alsoHandling JSON schemas that are incompatible with your modelsGetting readyHow to do it...How it works...See alsoCatching common JSON errorsGetting readyHow to do it...How it works...See alsoSaving data simply with SharedPreferencesGetting readyHow to do it...How it works...See alsoAccessing the filesystem, part 1: path_providerGetting readyHow to do it...How it works...See alsoAccessing the filesystem, part 2: Working with directoriesGetting readyHow to do it...How it works...See alsoUsing secure storage to store dataGetting readyHow to do it...How it works...See alsoDesigning an HTTP client and getting dataGetting readyHow to do it...How it works...There’s more...See alsoPOST-ing dataGetting readyHow to do it...How it works...PUT-ting dataGetting readyHow to do it...How it works...DELETE-ing dataGetting readyHow to do it...How it works...

Advanced State Management with Streams
Technical requirementsHow to use Dart streams Getting readyHow to do it...How it works...There’s more...See alsoUsing stream controllers and sinks Getting readyHow to do it...How it works...There’s more...See alsoInjecting data transforms into streams Getting readyHow to do it...How it works...See alsoSubscribing to stream eventsGetting readyHow to do it...How it works...See alsoAllowing multiple stream subscriptionsGetting readyHow to do it...How it works...See alsoUsing StreamBuilder to create reactive user interfacesGetting readyHow to do it...How it works...See alsoUsing the BLoC pattern Getting readyHow to do it...How it works...See alsoSummary
Using Flutter Packages
Technical requirementsImporting packages and dependenciesGetting readyHow to do it...How it works...See alsoUsing dev dependencies Getting readyHow to do it...How it works...See alsoCreating your own package (part 1)Getting readyHow to do it...How it works...See alsoCreating your own package (part 2)Getting readyHow to do it...How it works...See alsoCreating your own package (part 3)Getting readyHow to do it...How it works...See alsoAdding Google Maps to your appGetting readyHow to do it...Adding Google Maps on AndroidAdding Google Maps on iOSHow it works...See alsoUsing location servicesGetting readyHow to do it...How it works...See alsoAdding markers to a mapGetting readyHow to do it...How it works...There’s more...Summary
Adding Animations to Your App
Creating basic container animationsGetting readyHow to do it...How it works...See alsoDesigning animations part 1 — Using the AnimationControllerGetting readyHow to do it...How it works...See alsoDesigning animations part 2 — Adding multiple animationsGetting readyHow to do it…How it works...Designing animations part 3 — Using curvesGetting readyHow to do it...How it works...See alsoOptimizing animationsGetting readyHow to do it...How it works...See alsoUsing Hero animationsGetting readyHow to do it...How it works...See alsoUsing premade animation transitionsGetting readyHow to do it...How it works...See alsoUsing the AnimatedList widgetGetting readyHow to do it...How it works...See alsoImplementing swiping with the Dismissible widgetGetting readyHow to do it...How it works...See alsoUsing the animations Flutter packageGetting readyHow to do it...How it works...See alsoSummary
Using Firebase
Configuring a Firebase appGetting readyHow to do it...Adding Firebase dependenciesHow it works...See alsoCreating a login screen Getting readyHow to do it...How it works...See alsoAdding Google Sign-inGetting readyHow to do it...How it works...See alsoCustomizing Sign inGetting readyHow to do it...How it works...Integrating Firebase AnalyticsGetting readyHow it works...How it works...See alsoUsing Firebase Cloud Firestore Getting readyHow to do it...How it works...See alsoSending push notifications with Firebase Cloud Messaging (FCM)Getting readyHow to do it...How it works...See alsoStoring files in the cloudGetting readyHow to do it...How it works...Summary
Firebase Machine Learning
Using the device’s cameraGetting readyHow to do it...How it works...See alsoRecognizing text from an imageGetting readyHow to do it...How it works...See alsoReading a barcodeGetting readyHow to do it...How it works...See alsoImage labelingGetting readyHow to do it...How it works...Building a face detector and detecting facial gesturesGetting readyHow to do it...How it works...See alsoIdentifying a languageGetting readyHow to do it...How it works...See alsoUsing TensorFlow LiteGetting readyHow to do it...How it works...See alsoSummary
Flutter Web and Desktop
Creating a responsive app leveraging Flutter WebGetting readyHow to do it...How it works...See also...Running your app on macOSGetting readyHow to do it...How it works...See also Running your app on WindowsGetting readyHow to do it...How it works...See also...Deploying a Flutter websiteGetting readyHow to do it...How it works...See also...Responding to mouse events in Flutter DesktopGetting readyHow to do it…How it works...See also Interacting with desktop menusGetting readyHow to do it...How it works...See also...Summary
Distributing Your Mobile App
Technical requirementsRegistering your iOS app on App Store ConnectGetting readyHow to do it...How it works...See alsoRegistering your Android app on Google PlayGetting readyHow to do it...How it works...See alsoInstalling and configuring fastlaneGetting readyHow to do it...Installing fastlane on WindowsInstalling fastlane on a MacConfiguring fastlane for AndroidInstalling fastlane for iOSSee alsoGenerating iOS code signing certificates and provisioning profilesGetting readyHow to do it...How it works...See alsoGenerating Android release certificatesGetting readyHow to do it...How it works...See alsoConfiguring your app metadataGetting readyHow to do it...Adding Android metadataAdding metadata for iOSHow it works...See alsoAdding icons to your appGetting readyHow to do it...How it works...See alsoPublishing a beta version of your app in the Google Play StoreGetting readyHow to do it...How it works...See alsoUsing TestFlight to publish a beta version of your iOS appGetting readyHow to do it...How it works...See alsoPublishing your app to the storesGetting readyHow to do it...Moving your app to production in the Play Store Moving your app to production in the App StoreHow it works...See alsoSummary
Other Books You May Enjoy
Index

Content preview from Flutter Cookbook - Second Edition

10 Advanced State Management with Streams

In Dart and Flutter, futures and streams are the main tools to deal with asynchronous programming.

While Future represents a single value that will be delivered at a later time in the future, Stream is a set (sequence) of values (0 or more) that can be delivered asynchronously, at any time. Basically, it is a flow of continuous data.

In order to get data from a stream, you subscribe (or listen) to it. Each time some data is emitted, you can receive and manipulate it as required by the logic of your app.

By default, each stream allows only a single subscription, but you will also see how to enable multiple subscriptions.

This chapter focuses on several use cases of streams in a Flutter app. You will ...

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ISBN: 9781803245430

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Soft Skills

Flutter Cookbook - Second Edition

by Simone Alessandria

10

Advanced State Management with Streams

Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.